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DIY Cruising Catamaran: Complete Building Guide

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A brand-new cruising catamaran can set you back a hefty amount of money. However, a DIY cruising catamaran provides a more affordable way to own your own boat. While building a large boat can be an extremely challenging and time-consuming experience, nothing beats the pleasure of bringing your own boat to life. 

To build a DIY cruising catamaran, buy good design plans, determine your budget and find a working space. Next, choose your hull material, buy supplies and start building the mast beam. Build and sheathe the hull, install bulkheads, the interior, and finally, launch the catamaran boat.

In this article, you will find a complete guide to building your own catamaran. You will also find detailed information on why you may want to consider building your catamaran and approximately how much this project would cost. Finally, we will explore the advantages and disadvantages of building a catamaran from scratch.

Why You Might Want To Build Your Own Catamaran

Most people might think that purchasing a used boat to repair and fix it up would be cheaper than a DIY cruising catamaran. But while building your own catamaran could be an enormous undertaking, it also comes with many advantages over buying something used. 

Other than the unique opportunity to create beautiful memories and experiences while cruising, sailing, and exploring beautiful coastlines, there are a number of benefits that come along with the DIY approach.  

Knowing Your Boat

Building your own catamaran provides you with intimate knowledge of your boat. You will know every corner, including where to find every bolt, wire, bulkhead, rib, hose, and support as you installed them yourself. This knowledge will enhance your confidence while at sea since you will have entrusted your life to a boat whose history you are aware of and deeply connected to.

Pride of Ownership

The satisfaction you get from crafting something with your own hands is immense. As a result, the knowledge that you built your boat from scratch will fill you with absolute pride and an immense sense of achievement. Furthermore, as an owner-builder, you get to keep and enjoy the boat for as many years as you wish.

Substantial Cost Savings

Building your catamaran will work out cheaper than buying a new or even gently used boat. Though you will likely require some additional labor since doing some things will require an extra pair of hands, if you are particularly good at DIY, you will save a significant amount of money on labor costs as a whole. 

Freedom To Create Your Own Designs

If you decide to buy a catamaran boat, it might not be easy to find one that meets your unique needs. However, instead of choosing from production boats that bear traditional and outdated designs, you can come up with an ultra-modern design or style for your catamaran. You also get to pick your layout, size, and equipment based on your taste and budget.

Great Learning Experience

Building your own boat will help you pick up numerous skills that will come in handy later when sailing your boat. As much as you might still require an expert to help you with specialized skills like carpentry or wiring, your new skills will serve you well. This will also be beneficial when it comes to your boat’s maintenance and fixing things for yourself. 

What To Look For in Catamaran Boat Designs

When deciding on the type of catamaran boat to build, you may want to choose a design that’s simple and easy to build. This is because doing so will allow you to spend a shorter time building the boat. 

You also need to have a set of requirements to guide you in choosing your design or what you might call an ideal cruising catamaran wish list. This is essential because, ultimately, you want to build a boat that offers outstanding qualities such as:

• Delivers good speed
• Affordable to own and operate
• Agile, strong, and easy to maintain
• Has a high resistance to capsizing
• Great for sailing and cruising
• Delivers a comfortable and easy motion underway
• Good handling ability and high performance under sail
• User-friendly embarking and disembarking
• Provides ample living and accommodation space 
• Presents a reasonable resale value

It’s worth noting that, in general, catamaran boats tend to offer a fair resale value mainly because of scarcity and the high price accorded to production models. So, if you build a well-constructed catamaran, you are bound to get a return that’s much higher than the cost of materials upon resale.

It’s also good to consider whether the design you settle on is from an established designer. This is significant because documentation of the building process is just as valuable when it comes to selling the boat.

How Much Would It Cost To Build Your Own Catamaran?

The cost of building your cruising catamaran will depend heavily on the size of the boat you plan to build and the skills you bring to the table. To give you an idea of probable costs, a professionally built 40 foot (12.1 m) long cruising catamaran could go for up to $300,000. 

Though building it yourself will undoubtedly be cheaper, most DIY boatbuilders tend to underestimate the expected costs. Your final costs should cover not only the cost of material and equipment but also the labor and time it would take to come up with the final product. 

If you were to build a 40-foot (12.1-meter) catamaran, your cost of materials would range between 20-30% of the total cost. Therefore, for $300,000 total, the boat’s materials would range between $60,000 and $90,000. The hull tends to range between 15-35% of the total build. Again, this depends on the finish and furniture.

But before you even start working on the DIY project, you will need to figure out where to do the work. If your home has ample space, then you can opt for a backyard building. But if you live in a small apartment, then you might want to consider renting a small garage at first and then move on to a boatyard later. This is one of the significant costs involved in building your multi-haul.  

What You Will Need

To get a clearer picture of how much the entire project would cost, let’s have a look at what else you will need to purchase.

• Good design plans
• Working space
• Ground tackle
• Matting and roving
• Equipment such as the engine, windows, rudders, deck fittings, mast, and rigging

In addition to the above, you also need to install plumbing and electricals. You may also want to consider going electric rather than using diesel. Not only will this drastically reduce your maintenance costs, but you get to use the regenerated power for all of your housing needs while sailing. 

Some catamaran boat designs help you save costs by advocating the use of less expensive corpus materials. Most of the material goes directly into making the boat, which means there is hardly any wastage on vacuum bagging . With this method, there are few molds and temporal building forms and fewer fillers to grind off as waste. All these factors reduce the time and cost it takes to build your catamaran boat.

That said, building a boat of any kind is a huge financial undertaking. As such, you still need to have the financial ability to keep building; otherwise, your project will stall or take much longer than anticipated. Instead of enjoying yourself and making memories cruising to faraway lands, you might end up spending all your time building a seemingly never-ending boat.

To reiterate, this project is more of a labor of love, given that it involves a tremendous amount of manual work. Calculating an hourly rate on the time spent building the boat and adding this cost to that of materials may make it seem a very pricey exercise. However, it is vital to understand that your time matters, and every hour you spend working for “free” should be included. 

With that in mind, you need to ensure that you are fully devoted to the boat construction project and are sure you want to do it before you begin. Stopping halfway because it seems like too much work would be incredibly costly.

How To Build a Catamaran

When it comes to building a cruising catamaran, you have 3 main options:

• You can buy an old boat and refurbish it.
• Purchase a bare hull plus deck molding for a home-boat building.
• Start from scratch and build everything, including the hull, on your own. 

As mentioned above, renovating an existing boat may end up being more costly than starting from scratch. To build a catamaran boat from scratch, follow the below step-by-step guide.

Prepare the Essentials

Before you jump into such a large project, there are several important aspects to consider:

• Buy your plans from an established catamaran designer. You can also get inexpensive, easy-to-build catamaran designs online.
• Get access to a large working space or build a shed . Depending on your climate, you may need to opt for climate control to avoid an excess of moisture in humid areas. 
• Decide on your choice of hull material. This could be fiberglass, aluminum, steel, wood, or ferroconcrete. 
• Start working on a bill of materials estimate. Include everything that you think you need to get a better idea of the initial costs.

Build the Mast Beam

Using wood and epoxy, cut and glue together the pieces of wood that will form the mast beam. Most of the work at this stage can occur in a garage since it involves building small parts. Still, the work could take up to 4 months, so be prepared to put in long hours.

Build the Boat Hull

Now, it’s time to build the boat’s hull. A catamaran comprises two hulls which are connected with a deck. Below is a short video showing how to build a hull mold:

This work requires a larger facility, so you might need to move out of the garage and into a boatyard. If you don’t have access to a larger workshop, consider building a shed where you can work as you do the construction. Make sure there’s enough room to fit the boat and also allow you to work comfortably. To cover the shed, you can use opaque white tarps. 

Sheathe the Hull

Get all the materials you require for this stage in the construction, such as lots of resin, fiberglass, and foam for use in the hull cores. You’ll also require matting and glass roving to sheath the hull . 

Sheathing helps to make the hull impervious to water and other marine borers. But first, you need to prepare the hull using a rotary sander. To make it as smooth as possible, use light, sweeping strokes. This is a very dusty task so be prepared to wear a facemask and safety goggles. 

Install the Bulkheads

Next is installing the plywood bulkheads . You might need to call in friends to help turn the hulls or use a crane. In this step, you will need to laminate the hull sides on the molded hull panels and bond them above the bulkheads. Ensure the bulkheads are snug and sealed in place.

Construct the Interior Structure

Over the next couple of months, the boat work will involve joining the hulls together with the beams that you had made back in the garage. Then, install the cuddy cabin, decks , and the cockpit . Soon the boat will start to take the shape of a catamaran.

Next, proceed to construct the major structural components such as stairs, hatches, mini-keels, and the interior. Then comes the work of fairing the boat, which is quite labor-intensive. 

Finally, it’s time to apply primer on the catamaran boat and start the paintwork. Before painting the boat, you will need to do additional sanding to finish off the two layers of primer as well as fill all the pinholes. Since it’s a large boat, the catamaran has lots of surface area; thus, the sanding could get extremely exhausting—mentally and physically—at this point.

The painting can take a while, too. The hulls are the easiest to paint, but the topsides, non-skid, as well as masking and prepping could seem never-ending. 

The final stretch involves working on the center bridge deck cabin and other final touches like installing the engines, electricals, and plumbing. This is also the time to fix the rudders, rigging, mast, windows, and deck fittings.

Launch Your Cruising Catamaran

After many months or years of hard work, your cruising catamaran is finally ready to test the waters. After lowering the boat into the water, check carefully in case there are leaks. If none, you can set up the sails and take your catamaran out for your first cruise. 

Below is a short video that takes you through the entire boat-building process:

If you don’t have deep pockets, don’t despair. It’s also possible to build an inexpensive catamaran boat, as shown in this post from the coastal passage .

The Pros of Building a Catamaran

Though it will be a costly endeavor, there are so many things to look forward to should you decide to build your own catamaran:

• It can be lots of fun.
• You get to have a new boat.
• It’s an excellent hobby for DIY enthusiasts.
• The effort is rewarding.
• It offers a great learning experience.
• You get the exact kind of boat you want.
• You can alter building plans and tailor the boat to suit your specific needs.
• It might be cheaper than buying a new boat.

The Cons of Building a Catamaran

Though there are a number of positive aspects to a DIY build, it is just as important to keep in mind that it won’t always be easy:

• Maintenance costs can be quite high.
• It’s both mentally and physically exhausting.
• It might require some technical know-how.
• It can take many months or even years to complete.
• It requires a lot of commitment to finish the DIY project.
• It might be challenging as well as expensive to get insurance.  
• You will spend almost all your free time building the boat. 

DIY Cruising Catamaran Tips and Tricks

If you are new to boat building, it would be a good idea to build a small boat first. This would give you a good indication as to whether you’d enjoy tackling a more extensive project like building a catamaran. Again, if you are the handy type, fixing your own electronics could also save you a significant amount of money. 

Here are more tips and tricks to get the most out of your DIY cruising catamaran:

• Lower your costs. Bring down your costs even further by sourcing for parts and supplies at marine surplus outlets, Craigslist, eBay, or wholesale suppliers. 
• Enhance your resale value. Most home-built boats are not easy to sell since they tend to be too customized. To enhance your resale value, it’s advisable to work with a standard design from a well-established naval architect.
• Follow the design instructions. Make sure to follow the designer’s instructions regarding the type of materials and tools to use during the build to avoid making costly mistakes.
• Maintain your original budget. Avoid any additional customizations once you have started building the boat. Using good plans and sticking to them ensures that your budget doesn’t spiral out of control.

Final Thoughts

Building a catamaran is about more than saving money. It’s fun, exciting, fulfilling, and can be a great learning experience. While it might take many months of back-breaking work, comparative shopping and sourcing for materials will help you save a lot of money. Still, at the end of it all, you’ll have a beautiful catamaran boat, all ready for your first cruising adventure.

However, if you have neither the time nor the energy to build your own catamaran from scratch, refurbishing an existing hull might prove faster and easier. It also works out much cheaper than buying a new boat.

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

One thought on “ DIY Cruising Catamaran: Complete Building Guide ”

Hello, I am a French Quebecer who is original, imaginative, creative and who finds that all boats and catamarans have a huge flaw and a very big lack of logic. I would have a brand new concept…. I am sending this message to any catamaran creator – designer to make those who have the opportunity and the intelligence to want to know about my innovative idea which will finally upset the market much richer. An idea that will totally change the concept of sailing, navigation and save so much worry!! All I would ask for is a small percentage of each sale of the new product. To be able to make me produce one when I have enough!! It is certain that like that, you just want to tell me: come on Mr. Lessard give us your idea but do not take your word to help me in return! But, if you are the kind of man to have only one word and maybe have a proof of your good faith if the realization of the project would make it… I will be very happy!! Giving it to everyone wouldn’t bother me either…. all I would like is to be able to find flax fiber (too expensive carbon) to be able to try to make my catamaran myself. Because not rich! Have a nice day and looking forward to having a message!!

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Open Source 13-15m Catamaran Plans

Discussion in ' Projects & Proposals ' started by archie1492 , Jan 3, 2018 .

archie1492 Junior Member

Dear all, I want to create a detailed building information model for a 13 - 15 meter catamaran that is capable of being CNC cut and assembled. I need some help finding plans I can use as a basis of design. Specifically, I need the hull profile information. Section cuts through the hull will give me the ideal contours for a boat of this size. Can someone help? After weeks of searching, I still cannot find these online. For now, this is merely an exercise in my 3d modeling capability. I'd like to share my drawing work with the forum if I can get some assistance to start off. There are future possibilities I am also considering. I'm an experienced Architect & construction designer with a strong background in computer aided design. Once I've modeled the boat in 3d, I would like to flatten the various parts and create plans for the individual boat parts to be CNC cut. I would like to build a small scale model first (1:2o or perhaps 1:10) with the ultimate goal of building the boat full scale.  

TANSL Senior Member

This is a very simple catamaran which, if you are interested, I can give you a lot of information. It is not a spectacular boat but it can help you in your first steps with boats. LOA = 16 m, Lbp = 14.6 m  

Thanks I really appreciate it. The hull lines for the motor cat you've provided are not quite what i'm looking for. I'm specifically looking for the hull lines for a 14m catamaran sail boat. I guess there is some standard for these contours especially the area below the waterline. Check the attached document as well if anyone is interested in this.  

Attached Files:

catdimension.pdf

I'm sorry, you never specified that it was a sailing catamaran. I thought that to carry out your purposes, " For now, this is merely an exercise in my 3d modeling capability ", any model was valid. Apparently, you have different purposes than, in addition to, to practice with 3D models. The better you clarify what you are really looking for, the better someone can help you.  

Hi all, Here's an example of what kind of information I need to get started. Optimising Hull Lines for Performance https://www.graingerdesigns.net/the-lab/optimising-hull-lines-for-performance/ The boat shown here is a 8.5m cat sailboat. I'm looking for something a bit larger in the 14m range. Also, the images only show one of the hull profiles. I'd like profile lines for the entire boat. I will post some other images I've found online showing profile lines for smaller boats. I still cannot find any 14m hull lines. Can anyone help?  

grainger_1488019480.jpg

Grainger_1488019410.jpg, grainger_1488019333.jpg, grainger_1488019265.jpg, grainger_1488019219.jpg.

Here are some other hull lines I've found online. Hope this is useful to anyone else looking for this information. Thanks!  

Evergreen Lines small.jpg

Hull-lines.jpg, shark-20.jpg.

You could take any of those boats and scaleb the lines to get the desired length. Since it is only a 3D modeling exercise, you do not have to worry about anything else. You could even make a mix of 2 or 3 of those models to get the one you are looking for.  

Thanks Tansl, I'd like to make the boat drawings accurate for the 14m size. Perhaps one day I will develop this into something worth building full scale. The more accurate I can draw the boat, the more I will learn about the boat design.  

Maybe it does not look like it but I would like to help you. If you do not find what you want on the Internet I could draw a lines plan, strictly following your instructions, which would help you to make the 3D model. Or, if you find something similar on the internet I can adapt it to your needs and fill in the information that you indicate you need for your work. I insist that starting from the shapes of a 10 m boat you can get the shapes of a boat of 14 m, with total accuracy.  

Dolfiman Senior Member

archie1492 said: ↑ I'd like to make the boat drawings accurate for the 14m size. Perhaps one day I will develop this into something worth building full scale. The more accurate I can draw the boat, the more I will learn about the boat design. Click to expand...

Cata 14m with Gene-Hull UE Catamaran 2.3_2018 01 15.ods

Gene-Hull Catamaran 2.3 User Guide_2018 01 16.pdf

Hull for cata 14m with Gene-Hull UE Catamaran 2.3_2018 01 16.pdf

Dolfiman, thanks so much! This is exactly what I was looking for. It's very interesting and probably a bit over my head at this point. I think this should work for modeling the basic hull shape. For the bridge deck and all of the stuff above the hull I can model this with a bit more creativity. Although, I'd like to learn more about understanding the center of gravity for the boat and the proper location of the mast. Are there any rules of thumb about this? Thanks again!  

archie1492 said: ↑ I think this should work for modeling the basic hull shape. Click to expand...

Cata 14m V2 with Gene-Hull UE Catamaran 2.3_2018 01 15.ods

In complement to illustrate this first approach, my good friend Alain did some 3D views here attached of the hull V2 version with Multisurf (using fit for purpose ouput data in section 5. of the above file). To inspire you , some other examples of cata, more sport/day sailer oriented than the Saona 47 : - R/P 45 (Reichel-Pugh) : multihull http://reichel-pugh.com/tag/multihull/ - Dazcat 1295 : in this video, from 1:45 the launch, you can see the hulls from various angles https://www.youtube.com/watch?v=0BZF4Udda5E - SIG 45 (VPLP design) : from 1:20 you can see the winward hull fully lifted ​  

dean 1962 New Member

archie1492 said: ↑ Dear all, I want to create a detailed building information model for a 13 - 15 meter catamaran that is capable of being CNC cut and assembled. I need some help finding plans I can use as a basis of design. Specifically, I need the hull profile information. Section cuts through the hull will give me the ideal contours for a boat of this size. Can someone help? After weeks of searching, I still cannot find these online. For now, this is merely an exercise in my 3d modeling capability. I'd like to share my drawing work with the forum if I can get some assistance to start off. There are future possibilities I am also considering. I'm an experienced Architect & construction designer with a strong background in computer aided design. Once I've modeled the boat in 3d, I would like to flatten the various parts and create plans for the individual boat parts to be CNC cut. I would like to build a small scale model first (1:2o or perhaps 1:10) with the ultimate goal of building the boat full scale. Click to expand...

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Archie, I have been looking to do the same thing. Where are you at on the project? Very interested in hearing all about it. Thanks.  

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Woods Designs specialise in the design of sailing catamarans for both home and professional builders. However we also have a small range of dinghies, trimarans and power catamarans. Scroll down to see the full list, divided into lengths and boat types. Read More...

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The range of designs comprise a wide variety of open deck and bridgedeck boats. These boats have added load carrying and increased seakindliness compared to smaller designs so are more suited for offshore sailing.

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In September 2010 we were very pleased to announce the launch of our first powercat design, the trailable Skoota 20. It was a very successful boat which we cruised for two seasons in British Columbia. Seven more powercat designs are now available. In addition to the Skoota 20 there is a centre cockpit, trailable Skoota 24. Next, the Skoota 28 is a transportable coastal cruiser, and was the Woods Designs floating office/cruising home for 7 happy and successful years.

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to my website. Here you’ll find photos, stories and information on building boats large and small, with tips and tricks I’ve picked up along the way. I built this website originally to accompany my YouTube channel . The blog section has information on various topics.

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Building your own boat and sailing off over the horizon, is a dream that lives inside many. Well at least that’s the impression I get from the many people I met while building Tokyo Express (TE) and the feedback now f rom the videos on YouTube.  After years of dreaming, at 39 years of age I finally turned that dream into reality with the launching of Tokyo Express. This website is about my journey.

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Even the mast I bought as a kit. I had more time than money so I built everything I could. There were no exotic materials used and yet I ended up with a robust, lightweight and extremely competitive boat that was lighter than a typical production boat.

If I hadn’t been designing and redesigning many parts of the boat, learning for the first time how to do things and building a shed, the boat would have been finished a lot quicker.

On the Tokyo Express page

page you will find an overview of the steps I took building TE. If you are thinking of starting a similar project, this is a good place to start. It was a lot of work, but it was also the most rewarding project I have undertaken. It was well worth the sweat and tears. Please look around. Email me if you have questions…

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• Catamaran vs Monohull

by Tim Weston | Mar 11, 2019 | Building , Cruising

Catamaran vs Monohull If you are thinking of building or buying a yacht, you have a significant choice to make, before you even start looking at individual boats. Do you want one hull or two? Deciding between a catamaran and a monohull is a big decision and one worth...

• Going fast – in small boats – hull speed.

by Tim Weston | Sep 30, 2018 | Building , Plans

Going fast - in small boats (with a small motor) This article looks at how to go fast, in a boat with a small motor. Plodding along at snail’s pace can get a little boring. No matter how relaxed I am and how much time I have nothing puts a smile on my face quicker...

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Plans and Kits for Catamarans and Proas and other Multihulls

Check out my page on Advantages and disadvantages of multihulls

If you're planning a boatbuilding project you might like to check my boatbuilding resources. These are articles from my website and some outside links and build diaries.

Multihull plans in no particular order

Email me if a link is broken or if I've missed a boat. I try to keep my links good but things change quickly on the web.

I try to include most plans that I run across. I only exclude the ones that seem to be dubious, some are plagiarized or some just seem to be of terrible quality, or a website that includes pop-ups or other nasty things, that I don't dare include them. I have not personally checked all plans. Before building, do your homework.

• Bruce Roberts has aluminium and fiberglass boat plans for large Catamarans
• Schionning Designs has plans and kits for Cats, Trimarans and a keelboat.
• From Wooden Boat Magazine plans for a 20 ft Trimaran. Also a Sailing Outrigger Canoe
• Kurt Hughes has both large and small Catamarans and Trimaran plans.
• Sailing Catamarans has beach cats.
• Woods Designs has small and large boat plans
• K-Designs has Little Tri sailing trimeran dinghy and others.
• Dudley Dix Yacht Design has a large cruising catamaran
• Svenson's Free Boat PLans has an old Mechanix Illustrated Hobby Kat plans along with many other boat plans
• Duckworks Magazine has a whole section of small sailing multihulls.
• James Wharram Designs offers plans and will build also.
• Tornado Building Plans free from The Beachcats.com
• Hartley Boats has a few designs for sailing cats.
• Applegate Boatworks has plans for Blue Joseph, a proa
• Glen L Offers plans for La Chatte, sailing Cat.
• Scarab Folding Trimaran Dinghy.
• Selway Fisher has a design for simple Catamarans.
• Slider Cat Ray Aldridge design from Duckworks
• Gary Dierking is well known in the Proa community.
• Chesapeake Light Craft has many designs, well thought out plans and kits. This is Junior outrigger.
• Also from CLC 2 large proas Madness, and Mbuli
• Novacat 17 Plans and build photo IN German, get mr. Google to translate.
• From Svenson's popular mechanix plans Cats Paw free plans
• Fyne Boat Kits has several multihull designs. He also offers add-on outrigger for canoes and kayaks.
• Instructable for a Polytarp Crab Claw sail for a proa
• A one day proa project Maybe not quite perfect but worth looking at. Here's another instructable sailing outrigger canoe
• Angus Rowboats has a sailing conversion plan with outriggers.

Too Much Choice

There are a great number of large cruising catamaran and other multihull plans out there. I think one of the reason is that building a large catamaran is easier than building a cruising size keelboat. Many designers feel confident that the home builder has a good chance of success in putting together quite a competent multihull.

I have not included all the large multihull plans and kits I have found, nor have I included many of the home made single effort catamarans that are out there.

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I try to be accurate and check my information, but mistakes happen. ALSO keep in mind that not all boat plans are well designed. Old Banks Dories are particularly tricky because they were notoriously unsteady until they had some weight in them. Check the boat forums, many people have built dories. I have not built these boats and I can't recommend or proscribe any.

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Projects: Constructing a 40ft catamaran with WEST SYSTEM epoxy

Work doesn’t necessarily slow down after retirement, as engineer Martin Ellison proved when he left his teaching post at the age of 59 and set about building his first boat. What started as some prompting from his wife to find a meaningful project evolved into the idea of building a 40ft catamaran. Martin tells epoxycraft how it all came about.

I have always loved being on or near the water and wanted to have a boat of my own. As someone who has renovated a few houses in the past, I wasn’t daunted by the idea of building a wooden boat from a set of plans, although I’m not sure it was the scale of project my wife had in mind!

I chose to build a catamaran because I wanted the space and stability; preferring a power cat, I searched online for some designs and went for the Skoota 36 ( Woods Designs ). This is a relatively simple timber and plywood design sheathed in fibreglass, although I have slightly modified the design to increase the length to 40ft so that I could enlarge the accommodation space in the hulls.

When I began in earnest in September 2014 I didn’t even have a boat shed, so that was the first project. It was ready for action by March 2015 and I have been steadily working on the boat for the past nine months.

I’ve used WEST SYSTEM  epoxy all over… and found its strength and versatility to be ideal.

For the build I’ve used WEST SYSTEM® epoxy all over – jointing, filleting, waterproofing and sheathing and have found its strength and versatility to be ideal for this project.

I’ve mainly used WEST SYSTEM 105 Epoxy Resin® with WEST SYSTEM 205 Fast Hardener® . In addition, I’ve combined the epoxy mix with WEST SYSTEM 403 Microfibres and WEST SYSTEM 409 Microsphere Blend® to ensure all the gaps have been thoroughly filled. When it came to sheathing, I used 300g and 600g Episize™ Biaxial Fabric and 300g woven WEST SYSTEM 787 Aramid Fabric® to provide extra protection below the waterline.

The boat build so far has taken just over 1100 hours. It’s a big boat and there’s a lot of work – mainly woodwork – involved in completing each stage. I’m enjoying it though, it’s very rewarding and most of the build has gone pretty smoothly.

As luck would have it there is another Skoota 36 being built in Canada which is about one year ahead of me and the owner has very kindly shared his build photos, which has been a great help. People say it looks very difficult but in practice it isn’t – it’s simply a case of following the plans and having the confidence to get on with it.

There’s still a bit of a way to go but I’m really looking forward to turning over so we can finalise the internal layout and then getting her in the water and cruising in her.

Our thanks to Martin Ellison for sharing his story. We wish him well and will be following him closely as he completes his build.

If you would like more information about this project you can follow the build on https://my-new-cat.weebly.com

Back to projects

Lochaber Coastal Rowing Club and the St Ayles Skiff Project

Life Aboard Speranza

A Journey into the Boat Industry

MIKE WALLER 

Yacht design, multihull boat plans by mike waller yacht designer.

TC670 TRAILER CAT This is an all plywood, trailerable, of the beach sailing cat designed for sheltered and semi-sheltered waters. The cabin has a double berth, a galley, small table area and W.C.

TC750 CATAMARAN This all plywood cat is a larger and more able development of the 670, and being wider, is capable of more extensive adventuring.

W880 CATAMARAN This true ocean going little cat sleeps 4 and is built in strip plank cedar and glass composite, and plywood. Sleeps 4, and has a seperate WC / shower area.

W1100 CATAMARAN This Ocean cruising vessel is in all plywood, and is capable of extensive ocean voyaging. Sleeps 5 in three seperate cabins, with seperate W.C / shower area.

W1160 CATAMARAN This ocean crusing family cat is built from strip plank cedar and glass composite. She sleeps 5 in 3 cabins and has a seperate WC / shower area.

W1200 CATAMARAN This ocean cruising family cat is a plywood version of the 1160, with rounded, strip planked hull bottoms and the rest of the boat in plywood. The transom is slightly extended to provide a wider boarding step.

W1350 CATAMARAN This is a family cruiser in cedar/foam/glass composite, intended for world cruising for a couple or small family

W1480 CATAMARAN This is a true, proven, live aboard world cruiser for a family of up to 6 in four cabins. The vessel is strongly constructed in strip plank cedar and glass composite, and plywood. She will take you anywhere.

CS25 CATAMARAN This little demountable cat has two seperate hulls, each with two berths. She is all plywood.

CS35 CATAMARAN This cat has two seperate hulls with V shaped truncated sections, each has a double berth. She is all plywood and has a center cockpit which can be built in to form a shelter cuddy.

CC31 CATAMARAN This full bridge deck cat is in multi-chine plywood, and has two huge double berths, a dinette and seperate WC / shower area

CC40 CATAMARAN This ocean voyaging cat is in multi-chine plywood, and has two seperate hulls, a center cockpit with cuddy, and unbelievable accomodation for a vessel of this type and size

• Basic Kayaking Knowledge , Learn

15 Free Boat Plans You Can Build This Week (with PDFs)

Boatbuilding is one of the most ancient forms of craftsmanship still alive today. As long as our ancestors have had a curiosity about exploring open waters, they have been practicing and honing their boatbuilding skills.

To be honest, however, building a boat is no small task. It will require a lot of work and patience to ultimately create a finished product that you are happy with and that is actually seaworthy.

Of course, we have also included a few free boat plans. You can keep in your back pocket for the next time you are asked to build a cardboard boat as part of a contest or lakefront teambuilding adventure.

We hope that these resources help you in your journey to build your own boat!

Photo by SeventyFour via Shutterstock

Free Boat Plans

Why build your own boat, 1. the wanigan, 2. the mouse, 3. the slipper, 4. the handy andy, 5. the junior, 6. the jolly roger, 7. the cork, 8. the hobby kat, 9. the tern, 10. the falcon, 11. the white duck, 12. the sea midge, 13. the zephyr, 14. the gypsy, 15. the crazy cardboard boat, 15 free boat plans you can build this week (with pdfs) – final thoughts, share on pinterest.

• The Wanigan
• The Slipper

The Handy Andy

• The Jolly Roger
• The Hobby Kat

The White Duck

• The Sea Midge

The Crazy Cardboard Boat

Photo by Halsey via Shutterstock

There are a lot of reasons why you should explore building your own boat versus buying a pre-made model. Here is a quick breakdown of the most obvious benefits:

• You will know the ins and outs of your finished boat better than anyone
• It can be a great project to work on with your teenage or even adult children
• You will gain valuable skills molding and shaping wood and other materials
• You can design your boat for your specific needs
• You don’t have to trust the sometimes-questionable manufacturing of mass-produced boats
• You can create a boat that functions as your second home on the water
• You can save money if you source materials mindfully

Of course, most first-time boatbuilders still experience some level of trial-and-error. With patience and perseverance, however, you can craft a one-of-a-kind vessel that has no equal anywhere in the world.

Free Boat Plans You Can Build This Week (with PDFs)

PC Duckworks Boat Builders Supply

The Wanigan boat began as a garvey design, which is one of the older boat plans known to the Americas. Traditionally, these boats were built as work scows and were very popular among American summer camps.

The design itself is very simple, but these boats can carry heavy loads. It can also handle a trolling motor being mounted to the stern so you can cover more ground if you want to use it as a fishing boat.

The creator of this boat plan became aware of some of the downsides of the garvey design, such as the heavier weight that made it less efficient than some other designs. So he combined elements of dory and wanigan designs to create a hybrid.

The main changes include an enlarged beam, tilted lathes to provide a stiffer hull, and knocking off the top strakes to reduce the boat’s overall weight.

The Wanigan text

These additional The Wanigan drawings   may also prove useful for your build process!

The Mouse is one of the most compact and nimble boat plans we have found for this list. It is an easy build and also a great boat for two kids or a single teenage paddler.

The original builder began with a one-sheet boat design in an effort to create the lightest and most affordable boat possible. This means it is only suited for calm waters and should not be used in high winds or wavy conditions.

That said, it was built in roughly 12 to 24 hours of work time and doesn’t require a full workshop to construct. The main material that is required for building this boat is quarter-inch plywood. But the builder recommends using one-inch by half-inch pine or something a little sturdier.

The plywood and pine components are held together using a method called ”˜stitch and glue’. This method requires choosing one of the best glues for kayak outfitting , which are typically made of epoxy and glass tape rather than something cheaper like polyurethane.

The Mouse Instructions

Also, here are a few extra useful The Mouse Notes for builders

The Slipper is the first of many sailboat plans on our list and it is faster, easier, and cheaper to build than most. It also features a deeper cockpit than many other sailboat designs, which makes it safer for intermediate sailors.

This sailboat plan features dual steering stations so that you can sail from inside or outside of the helm. It also includes a centerboard trunk that hardly intrudes into the cabin at all. So that, it is easier to work around while you are in the cockpit.

The exterior hull and cabin of this sailboat feature a modified dory design using two sheets of plywood ripped to three feet wide before being joined together. The resulting hull is a modified V-shape that reduces drag.

The centerboard of this boat can also be winched up to the level of the top of the cabin or lowered down to alter the draft. This allows you to customize the boat design for a stiffer and more weather-worthy vessel if you need it.

The Slipper was also intentionally designed with an aft cabin that naturally helps to keep the bow pointed into the wind whether you are underway or the boat is anchored in the port.

The Building Slipper

PC DIY Wood Boat

The Handy Andy is a great little 10-foot portable rowboat for hunting, camping, fishing, and other recreational uses. It is actually the only folding boat design on our list, which makes it best for folks that need the most portable boat plan possible.

This boat features a 42-inch beam and a depth of about 15 inches at the mid-section. It also weighs roughly 80 pounds when assembled and can handle up to three average-sized human passengers.

The design boasts a flat bottom with canvas-bound edges and the primary material used for construction is ⅜-inch marine-grade plywood. Despite its lightweight nature, this rowboat can handle trolling motors or even outboard motors with a maximum of five horsepower.

Once finished, the hull can be folded or unfolded in less than a minute’s time.

This design makes it one of the only boats on this list that can be stored in a truck bed or easily carried by two people to be launched at more remote locations.

If you are looking for an all-purpose dinghy that can handle almost any use you might imagine, look no further than The Junior free boat plan. It can carry three or four average-sized adults and is much easier to row than a traditional dinghy.

It is also durable enough to be equipped with a small outboard motor. You could even set it up with sailing equipment if you want to use it as a sailing vessel. As we said, this is truly an all-around boat design!

This boat plan requires constructing three frames that will provide the majority of the load-bearing support. The builder recommends using ¾-inch framing with ⅜-inch plywood as the exterior material for this boat build.

Resin glue and flathead screws are also required to hold this boat together. But there is a full list of materials included in the plans we have linked to below. Sticking to that plan should also give you enough leftover materials to construct two six-foot oars for rowing this boat until you install a trolling motor or outboard motor down the line!

Channel your inner Captain Morgan when you are following these plans to build your very own Jolly Roger boat. This flat bottom boat design is designed for pond fishing . It can also be a useful yacht dinghy for getting from your dock to a larger vessel anchored offshore.

The plan follows conventional dinghy construction methods but also includes a few modifications that will save you time and energy. The wide design is super stable for boaters of all ages.

The keel, frame, chines, and risers are all cut from ¾-inch oak, ash, or any other trusted hardwood you can get your hands on. For the smaller components, the builder recommends using cedar, cypress, fir, or white or yellow pine.

Because this boat plan is also sturdy enough to handle a small motor, it includes important points for protecting the wooden hull from spark plug damage.

Be careful to follow these guidelines to build the safest boat possible if you imagine installing a motor down the line.

The Jollyroger

The Cork is another simple rowboat design. This one trends away from the flat bottom plans that we have included thus far. Instead, it features a deeper, V-shaped hull that makes it better suited to more efficient rowing and easier maneuverability.

It can be rowed easily from either seating position and is durable enough to handle up to three average-sized adult passengers. The ends of the boat are identical, which allows for multi-directional rowing.

The list of materials required for this boat plan should cost you between $30 and $50, depending on your location and hardware costs there. The resulting build is lightweight enough for two people to be carried and also to be transported on top of a vehicle .

Inside the boat, the builders use aluminum tubing to secure the struts that hold the seats. This material choice keeps the overall weight of the boat down while still adding the necessary rigidity across the beam of the boat.

The Hobie Cat is one of the most iconic and recognizable small sailing vessels ever made. This Hobby Kat plan is your answer to building your own iconic sailboat without spending thousands of dollars.

Your finished boat will be able to handle speeds of up to 20 miles per hour. It will be a super fun vessel for windy days on the lake or bay. The builder was able to construct the hulls, decking, and rudder for this boat while spending little more than $200.

From there, they purchased and installed the mast, boom, sail, and rigging, which brought the total amount spent to roughly $650 (still much less than a name-brand Hobie!). Without the mast and sail, this boat weighs roughly 165 pounds and is constructed using primarily 3/16-inch marine plywood.

You can also elect to build your own mast, boom, and sail if you have the time and skills to do so.

Those elements are not included in this boat plan, but they do offer some recommendations for where to buy these components!

The HobbyKat

Named after the common seabird found around the world, the Tern is a lightweight and nimble sailboat with a 72 square foot base design. She is made for inland sailing and planes very well in moderate breezes.

The hull design also provides minimal water resistance and the small floor plan makes this boat easier for intermediate sailors to handle. Even though it offers a small footprint, this boat is sturdy enough to handle up to four adult passengers.

One of the best things about this boat plan is that it can be built almost entirely by using only common hand tools.

Of course, you can speed things up if you have power tools and you are skilled enough to use them correctly.

The Tern boat plan includes a 20-foot mast, but you can shorten that length if you desire. The plan includes a complete list of materials and step-by-step instructions on how to plane and assemble each element.

As you might expect from its name alone, the Falcon is an incredibly speedy sailboat for its size. It boasts a 14-foot centerboard and can handle two to four passengers, depending on its size and weight.

In tests of the original build, the creators claim that this boat out-distanced many Snipe and Comet sailing vessels as well as pacing evenly alongside longer 18-foot sailboats. When finished, your boat will have a six-foot beam and a total weight of roughly 475 pounds.

For the main framing components, they recommend using white oak and plywood will be the main material used in the hull construction. The hull features a V-shaped that was inspired by larger schooners.

The Falcon is best suited to sailing on bays, lakes, and wide rivers. It is also a boat plan with just under 120 square feet of deck space and it is a great build for amateur craftsmen and sailors.

The White Duck is a flat-bottomed rowboat with a total length of 13’6” and a four-foot beam. The cockpit is approximately 15 inches deep all the way around and this boat can handle up to five passengers while maintaining buoyancy and stability.

When fully constructed, it will weigh roughly 200 pounds, but the final weight will depend on the type of lumber you choose for your build. This boat plan features plywood planking over solid wooden frames.

The White Duck is built with a pointed bow that cuts nicely through the water. The flat stern of this boat design will make it easy to attach a small outboard motor with a maximum of six horsepower.

As you might expect from its name, this rowboat is a great option for duck hunting trips. That being said, it is a highly versatile craft that can also be used for pond fishing or casual rowing on your nearby lake.

The Sea Midge is one of the smallest rowboats on our list and it is ideally suited for one average-sized rower or two small paddlers. It is only about 8 feet in length and offers a 52-inch beam at its widest point.

The Midge’s small dimensions make her ideal for navigating narrower creeks and streams. With an approximate weight of 62 pounds, she is easy to maneuver on the water and can also be much more easily transported than some of the larger boat plans on our list

The Seamidge

The Zephyr is a compact and speedy dinghy sailboat that measures roughly 14 feet long and approximately five feet across. This boat style was originally developed for safely crossing the English Channel. This means it can stand up well in rough waters.

When finished, it is also light enough to be transported on a small trailer or on top of a larger vehicle.

The boat plan calls for using hemlock or fir for the framing and oak or Douglas fir for the keel and chines.

The Gypsy is a small cruising sailboat that is meant to be equipped with an outboard motor for powered locomotion. The original design resulted in an incredibly seaworthy vessel that logged more than 6,000 nautical miles in her lifetime.

It includes a comfortable cabin that makes it well-suited for multi-day sailing adventures. This boat plan includes improvements on the original design that will help you build an extremely durable and long-lasting sailboat.

The Gypsy boat design will help you construct a vessel that can handle a motor up to 25 horsepower so that you can enjoy cruising speeds of up to nine miles per hour.

While it may require a bit more of an investment in time and money, it will also help you produce one of the best boats you can build with a free boat plan!

PC Saint Dominic Catholic School

Finally, let’s talk about a crazy cardboard boat plan that you can build in less than a day. This is a great boat plan to bookmark for your next teambuilding project so that you can earn bragging rights with your coworkers.

The plan calls for using 1.5 sheets of cardboard. But you can use the remaining half sheet to build your own boat paddle if you want to get creative.

Triple-thick cardboard is best for this boat plan. But you can always double up thinner sheets if that is all you can find.

These plans include an easy-to-follow diagram for marking, cutting, and folding the cardboard sheets to create the hull of your boat. From there, it calls for using contact cement and construction adhesive to seal the edges and corners.

If you are looking to save a little money on this build you could also use duct tape and then wrap the entire design in plastic sheeting to provide waterproof qualities.

Overall, this build is one of the cheapest and easiest on our list. It is also a great project for hot summer camp days on the lake or river!

Photo by Alexandra Soloviova via Shutterstock

We hope that you now have a couple of free boat plans to inspire you to begin your own construction project.

Don’t hesitate to check out YouTube for some useful boat-building videos when you are getting into the nitty-gritty of these build processes!

Enjoyed 15 Free Boat Plans You Can Build This Week (with PDFs)? Share it with your friends so they too can follow the Kayakhelp journey.

Peter Salisbury

Pete is the Owner of KayakHelp.com. Born and raised in Cleveland, Ohio, he grew up kayaking, fishing, sailing, and partaking in outdoor adventures around the Great Lakes. When he’s not out on the water, you can find him skiing in the mountains, reading his favorite books, and spending time with his family.

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Wanigan (Free plans)

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BY WESTON FARMER

As old as boating in America is the garvey design It's no wonder. These shoal-draft work horses  combine super-simplicity with rugged carrying ability

These plans are free to  download .

This utility garvey was designed to fill a need for a simple work scow anyone can build to use in a summer camp. You can haul rocks with her, fish out of her, beach her easily. The garvey is a gussied-up scow. The name is a local one, in use on the Jersey marsh reaches, where the water is thin, money sometimes thinner, and where the scow type of hull has for generations blossomed forth as the “garvey”—plebeian, often homely, always plain, but what a work horse!

But even in this simple design there were some problems. I knew she’d have to be trailable, whereas the true garvey is heavy. She’d have to be fine-lined enough to move with from 3 to 7 hp kickers, and she’d have to have the carrying power of a north woods wanigan—a lumberjack’s store boat—to lug the camping stuff Joe Doakes would.

How to meet these conflicting requirements may not loom large now, but. they did at first.   I was sitting on a cedar stump in my yard after supper, when the answer came to me. There, before me, bottom up on the muskeg, was a boat I have loved for 46 years—  Badger , about which I wrote and the design for which I presented in the 1956 boatbuilding annual.

Badger had the feel I wanted this new garvey to have. Here was a boat sized by some ancient master in the old Toppan Dory shops. I’d cruised her into every pothole from Duluth to Rossport, and loved her. Notwithstanding some purely dory traits, such as crankiness until loaded, she has given more pleasure to several owners than any other boat I can recall offhand.

Right there in the cool shadows of the forest I flopped her right side up, stood in her, and my feet felt all the old quirks she had. So I took a Swede saw, knocked off her top strakes for firewood—they were punky and she had to go sometime— and stuck laths in the muskeg to give enlarged beam to the floor area between chines, tilted the lath to proper angles for stiffening the hull up under burden, and, transferring the resulting measurements to my notebook, sketched the profile and deck plan of the boat presented in the plans.

She’s thus part dory, part garvey. and part north woods wanigan. Tbe combination of work-horse pedigrees back of her should produce a fine boat. To download Wanigan free plans click   HERE .

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