The Stitch and glue method of boat construction is faster and lighter than traditional wooden boat building methods. The development of epoxy resins and quality marine plywood has revolutionized wooden boat building for the self builder. There are only a few simple techniques which need mastering, plus some very basic woodworking knowledge.
Basically, stitch and glue boats are constructed by gluing panels of plywood together using epoxy resin and fiberglass. Stitching planks together in not a new method of boat building, it has been used for centuries, what makes it so suitable for the home builder is the use of epoxy. While there will be variations between different stitch and glue boat designs, the basics are the same.
Affiliate links. If you are building a kit boat the panels will be either pre-cut or at least marked out, otherwise you should at least be working from a proper plan. The planks are sewn together by drilling small holes along the edges of adjoining panels, then using short lengths of copper wire as the stitches.
The wire is threaded through the holes and twisted to pull and hold the panels tightly together until they are glued. A wire twister tool can be used to speed up the stitching process. Many stitch and glue builders are finding these ties to be very convenient and faster to tighten.
But it is much easier to fine adjust with copper wire and get sufficient pressure where there are tight bends. The reason that stitch and glue is faster and simpler than traditional methods is that it eliminates the need for chine logs, complicated forms, and tricky clamping. These not only glue the plywood panels but also cove out the inside corner where the panels meet.
Fillets are very easy to apply and add to the strength as well as enhancing the boat's appearance. Whatever you use the point is to produce a mixture that won't sag or run and will be easy to smooth and will sand easily when cured. Ideally the mixture should be the consistency of smooth peanut butter. Radius one edge of the spreader to suit the fillet, a 2 inch radius will do for most seams in a small boat.
Once the thickened epoxy is mixed to the ideal consistency you need to get it onto the seam quickly before it begins to 'go off'. You won't have a lot of time so make sure every ting is ready and you have decided where it is to go. Use the flat side of your squeegee to scrape away the epoxy which squeezes out on either of the fillet before it can set. The process can be a bit of a messy but try to keep the fillet as neat as possible to reduce the need for a lot of sanding once it the epoxy dries.
On the other hand don't try to do any touching up once the epoxy starts to stiffen as it will only make matters worse. Before the stitch and glue fillet has cured it needs to be strengthened and protected with a layer of fiberglass tape saturated with un-thickened epoxy. See the comment below for a useful tip when smoothing fillets. The standard size of a plywood sheet is 8x4 feet, so any planks that need to be longer than that will have to be joined using a scarf joint.
Practically all stitch and glue boats are given a sheathing of fiberglass cloth soaked in epoxy resin. When all the fiber-glassing has been done and the whole surface sanded to an acceptable finish the epoxy surface must be protected from UV light. Whether you paint or varnish and however much time and effort you put into the finishing, at least two or three coats of varnish or paint will be needed to protect the epoxy from the sun's rays.
Use the time you have saved by using the stitch and glue method to make a good job of the finishing off. A nicely finished boat will add to the pleasure of using it. Woodboat building questions a Forum for wooden boat building, plans, lumber, caulking compounds and other boat building problems.
A Worm Shoe is a non structural piece of wood whose 'sole' purpose is to protect the underwater wooden parts of a wooden boat keel, they need checking and replacing regularly. Ring Nails sometimes call Gripfast or ring shank, silicon bronze boat nails are renowned for their holding power. Wood Screws are the most widely used and versatile fasteners used on wooden boats.
Which type to use and how to use them. A brief Stitch And Glue Sailboat 98 description of the most common Timber used for building Wooden Boats how to choose wood for your project boat. A brief guide to timber properties and wood, characteristics such as strength, stiffness and elasticity for choosing lumber for wooden boat building and restoration.
Before using epoxies you should consider the flood of new scientific evidence on adverse effects of BPA. Air conditioning. Water maker. New kitchen Bow thruster. Hi my name is Sarah. My dad Robert Spinks loved boats and sailing on the Norfolk broads and at sea, he spent many months blood sweat and tears restoring. Does anybody have pictures of original look for a Elgin 14ft deluxe runabout?
Privacy Policy. Advertising Policy. Cookie Policy. I am perfectly aware that the majority of Wooden Boat aficionados are sensible folk. However, I need to point out that I am an amateur wooden boat enthusiast simply writing in order to try to help other amateur wooden boat enthusiasts. DIY Wood Boat.
Scarf Joints. Finishing Your feedback and Comments. Stitch and Glue Fillets. Overlapping Joint. DIY Woodboat Building Questions Woodboat building questions a Forum for wooden boat building, plans, lumber, caulking compounds and other boat building problems. Worm shoe Sacrificial Protection for Wooden Boats A Worm Shoe is a non structural piece of wood whose 'sole' purpose is to protect the underwater wooden parts of a wooden boat keel, they need checking and replacing regularly.
Ring Nails for Marine Fastening. How to use Copper Rivets and Roves construction guide to fasteners on your wooden boat. How to use Clench Nails, these provide a fast reliable method for fastening small wooden boats. Wood Screws for Boat Building and Repair. Make sure that the Wood that you buy and use is sustainably grown and harvested. Timber, Lumber for Boat Building. Timber Properties A brief guide to timber properties and wood, characteristics such as strength, stiffness and elasticity for choosing lumber for wooden boat building and restoration.
Taking up, how a Wooden Boat Becomes Watertight. Warning Epoxy Resins contain Bisphenol A. Recent Articles.
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