The
Plywood epoxy boat
Stich and Glue
Construction guide



Woodenboat supplier

Stages of construction of the boat using marine plywood and epoxy resin. (stich and glue)

You will find in this chapter details the various steps with pictures (not very good quality, no doubt) but in my opinion quite explanatory.

This small fishing boat is our first attempt at shipbuilding : as we will have to deal with some problems due to lack of experience.

But the knowledge of these errors will be useful in the true beginner will be able to avoid the pitfalls that we fell ...

All steps ...

How to draw the boat plans on marine plywood panels ?

This is the start : we'll draw the points obtained through the free software Delfship on marine plywood panel. It will be necessary to join two sheets of marine plywood (3.10 m long) to get a total length of 6 m.

Once the points are drawn, we have to connect them by drawing nice curves ..


 

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How to cut marine plywood panels according to the boat plan ?

The curves are plotted on 6 mm and 9 mm marine plywood panels.
We will then simply lay the two sheets of plywood on each other to cut with a jigsaw both sides at once. This is the faster it ensures to have two identical panel.

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Marine plywood panels assembly - paste with epoxy resin

We now need to assemble the two pieces of marine plywood  that make up each plank. The old technique was to "scarf" the boards. This is a rather long and now useless.

With fiberglass and epoxy resin, it is much easier to paste them together.

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How to assemble marine plywood boat by sewing - stitch and glue

Here now time to  the funniest operation in your project to build a boat. The stitch and construction technique is sewn glued to assemble the panels together with small clamps made ​​of plastic.
This operation is fast and rewarding because when it is completed our boat, suddenly takes form. It's really something magical!
Now let's see  the most fun and rewarding operation in the project to build wooden boat.

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Stitching the plywood panel with epoxy resin

Nous devons maintenant assembler les deux morceaux qui composent chaque bordé. La technique ancienne consistait à « scarfer » les planches.
C’est une opération assez longue et désormais inutile. Avec la fibre de verre et la résine époxy, il est bien plus simple de les coller directement bord a bord.

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Stratification of fiberglass reinforced epoxy on marine plywood panels

The epoxy putty joint is dry and whe have to sand it : rough edges will be a source of bubbles when it is stratified.

This step is very important because this is when the final strength and rigidity of the boat will be taken

 

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9 mm Marine plywood front and rear decks installation

To easily set front and rear axles we are preparing small cleats that we stick with Iroko's epoxy putty in the right places.
Two brackets for the front axle, two for the central trunk and three for the rear axle.

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Cutting and fitting gunwale of the boat in exotic wood - Iroko

The strakes are edging in an old sheet of iroko can a twisted. Our strake is constructed in two pieces, a strake placed outside, another inside.

Because our iroko plank is a little short, it is necessary to make an assembly of two parts.
Each strake is drilled to receive stainless steel screws 4 mm in diameter (but of 5mm shall have been more appropriate)

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Plywood sanding of underneath and sides of the woodenboat

The boat is then returned to the other side, and a first sanding can be done.

Sanding the bottom (the junction between the two pieces forming the bottom) and especially the "rails", that is to say outside the junction between the bottom and sides.

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Strengthening the transom for the electric motor and rudder

Our transom is designed to receive the helm - in fact a simple oarlock with an oar as a rudder - and an electric motor
It is made of
9mm marine plywood

To strengthen  the transorn, we chose to double by adding a 9mm marine plywood from the outside
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Construction of the plywood daggerboard

We want to equip our boat with a sail. We must plan a drift. Although drift "sword" - type Optimist - seems easier to achieve, we still opted for a pivot drift  We here in Lacanau Ocean, there is no harbour  to dock and we are forced to beach and in the wave zone.

The  Lake of Lacanau, in is  most quiet parts, is not accessible to other boats;-) So the minimum draft is a must have.

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Fiberglass and Epoxy resin stratification of the inside of the hull

After having sanded the inside of the boat, we will impregnated with epoxy resin.
It is difficult to make a glass like a surfboard.

 

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Installation of polystyrene foam for beer coolers and unsinkable purpose

To ensure that the wooden boat is unsinkable we chose to link business with pleasure. The majority of reserves of buoyancy is placed in two coolers of a brave or we can keep the bait or fish on one side and the other cold beers.

The buoyancy  reserve are cut to size in extruded polystyrene (styrofoam Dow). This foam has a density of 40 kg/m3 is quite rigid.

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Stratification of the woodenboat - epoxy, fiberglass and marine plywood

 the back-panel features : marine plywood and small piece of  iroko wood. Panels in front and rear axles of the boat and the two flaps of ice are cut from marine plywood 9mm.

 There are laminated with a layer of fiberglass. The side of marine plywood is protected by a small rod which is firmly glued  with epoxy

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Laying of the towing system on the bow of the fishing boat

The towing eye is essential for safety is required by regulation and common sense.

It used to tow the boat if necessary and hang it on the dead body with a stainless steel hook. It must be securely attached to the hull and must have a high resistance to picking. The ring and stem filletée stainless steel measuring 15 cm long and 10 mm in diameter.

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Stratification of the marine plywood outer hull with fiberglass and epoxy

Stratification glass / epoxy from the outside of the hull provides several benefits :
Improved impact resistance, greater rigidity of the bottom edges and marine plywood, wood Total protection, UV resistance, Super nice general appearance (glazing)

 

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Stitch and glue construction method picture
marine plywood epoxy resin : free boat plan