$@# Fiberglass Boat Building And DIY Guide &^@!

����� - ����-�������� "������ � ����" Boat building basics. Prior to the development of fiberglass construction techniques, boats were built of wood, steel, and other materials, by assembling pieces and parts into a structure which was then sheathed with a hull. With fiberglass boat building, however, the major components of the boat � the hull, deck, liner, and large parts like consoles�are molded from fiberglass. Lapstrake/Clinker is the method of wooden boat building where the planks overlap rather than butting each other. While an underlying back bone is needed, the framing can be done after the planking and ribbands may not be needed. The planks are fastened with rivets, clench nailsor glue where they overlap, resulting in a hull of considerable strength. Oct 12, �� The YouTube sphere is filled with beautiful videos that showcase the ways in which traditional wooden boats are built. Since I watch and subscribe to a few of these channels I thought that it might be interesting to highlight the Sampson Boat Co. myboat269 boatplans is the brainchild of Leo Sampson Goolden, a boatbuilder, sailor, and writer from Bristol, England, who is restoring/reconstructing a.
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In terms of stiffness, it is stronger per pound than S glass, E-glass, and Kevlar. In terms of its total structural efficiency, it is better than all of these materials, including carbon fiber. One big problem with wood, however, is that certain lifeforms like to eat it. Various fungi can infest and consume it, causing what is known as dry rot. Marine borers like the Teredo worm, or boring insects like carpenter ants and termites, can also chew their way through a boat pretty quickly.

Wood also rots when it gets too wet, is easily ignited, and is soft, with poor abrasion resistance. Structurally, in one important sense, it is deficient in that it is much less dense than other materials and thus takes up a lot of space. A wood hull must normally be much thicker than an equivalent glass hull, and its interior structural parts must also be larger.

Indeed, wood cannot be used at all to make certain small parts that carry great loads such as bolts, tie-rods, and rigging wire simply because it is too soft and too fat to fit. Perhaps the biggest advantage wood has over any other material, especially when it comes to building boats, is that it is inherently romantic. For this reason alone, it is likely someone somewhere will always be building wooden cruising boats, and that other people will always be sailing them.

This is the most traditional method of building a wood boat. The principle is simple, though the details are complex. The fundamental structure of a plank-on-frame vessel is defined by a keel, which is the horizontal backbone of the hull; a more vertical stem, which forms the bow; and a vertical sternpost plus, in the case of many yachts with long overhangs, a much less vertical horn timber that terminates in the transom , which forms the back of the boat.

On deep-keel vessels, especially on sailboats, there is also often what is called deadwood fastened beneath the keel.

The forward section is normally inhabited by a solid casting of metal ballast, preferably lead, that is fastened to the bottom of the boat.

A full-keel plank-on-frame sailboat under construction. You can see both the deadwood and the lead ballast down low Photo courtesy of Rockport Marine.

To help support the hull, lateral stringers are installed inside the frames. The skin of the hull consists of a series of planks fastened to the outside of the frames. These planks may be laid on the frame with their edges slightly overlapping, which is known as clinker, or lapstrake, construction. This is often done with smaller boats, but hardly ever with larger boats, as the many ridges formed where the planks overlap greatly increases wetted surface area.

Alternatively, planks can be laid on the frame edge to edge, creating a fair, smooth surface, which is known as carvel construction. Open seams on a carvel hull awaiting caulking. Note the tufts of cotton hanging out where caulking is underway Photo courtesy of Rockport Marine. The deck of the boat, meanwhile, is supported by a series of transverse deck beams, the ends of which are fastened to lateral shelves installed along the inside of the hull at the top of the frames.

Traditionally, the deck consists of planking fastened to the deck beams with all seams, again, carefully caulked. Another common way to seal decks, often used on yachts, is to cover the planking with painted canvas.

These days, however, many wood decks are simply good-quality marine plywood sealed with epoxy. Even from this abbreviated description it should be clear this is a labor-intensive way to build a boat. Much skill is also required. Just selecting wood to build with is an art, as there are numerous criteria to meet. The best wood should be cut only in winter to minimize the retention of moisture and microorganisms. It should then be air-dried in a climate-controlled environment for as long as possible�many months at a minimum.

The lumber should also be carefully milled to produce planks and pieces with the wood grain properly aligned to carry anticipated loads in the boat. Even if you use the best fasteners silicon bronze screws and bolts are preferred, though Monel is technically superior what ultimately limits the strength of a plank-on-frame boat is not the wood it is made from, but the fasteners holding it together. This weakness manifests itself in various ways.

First, because they are made from many different pieces, and in particular because so many plank seams are permanently submerged, plank-on-frame boats are apt to leak. Many are continually taking on water when afloat, and normally the only variable is the rate at which water is coming aboard. Invariably this increases when conditions get worse. I once sailed across the North Atlantic aboard a plank-on-frame schooner�one time we almost sank; the other time we did though, fortunately, this was in a river on the other side.

Plank-on-frame boats also often have deck leaks. The problem here is that wood in the deck is constantly swelling and shrinking as it gets wet and dries out. If the deck has open seams, all this expanding and contracting is apt to create gaps somewhere.

Even with painted canvas covering the seams, or with a solid plywood deck sealed in epoxy, there are again many fasteners securing hardware, each offering a potential route for water intrusion. Other structures sprouting from the deck�deckhouses, hatches, raised gunwales, etc. World-famous small-boat cruiser Larry Pardey waters the deck of his boat, Taleisin , to keep the planks swollen tight. Larry is a master boatwright he built Taleisin himself and maintains his boats scrupulously.

Finally, plank-on-frame boats can be a bear to maintain. All that wood, above the water and below, needs to be either painted or varnished on a regular basis.

Leaks must be policed and stanched if possible. Moist areas in the structure must be sought out, constantly monitored for rot, and replaced if the rot gets out of hand. Most, however, like Moitessier, would much prefer to just go sailing. Plank-on-frame boats still have a strong cult following and a relatively large number of older wooden yachts are sailed and maintained by devoted owners. But the most exciting wooden boatbuilding these days is done with composite wood-epoxy construction.

The key ingredient is modern epoxy, which is not only a tenacious adhesive, but is also highly elastic and nearly impermeable to water. Epoxy also protects the wood from hungry creatures that want to eat it.

Furthermore, a wood-epoxy hull forms a one-piece monocoque structure that cannot leak unless punctured. In most cases, to improve abrasion and impact resistance, the hull and deck are also sheathed in one or more layers of fiberglass cloth. The result is a boat with many of the virtues of fiberglass, with the added benefits of built-in insulation, plus all the fuzzy romantic feelings inspired by a genuine wood finish.

There are many ways to construct a wood-epoxy boat. One could, for example, build a wood-epoxy plank-on-frame vessel, but this would be labor intensive and the boat would be needlessly heavy and thick.

In practice, there are three basic approaches�strip-plank construction, sheet plywood construction, and so-called cold-molded construction. How-to Maintenance Buying and Selling Seamanship.

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Liked it? Share it! Facebook Twitter. With over two decades of experience in marine journalism, Lenny Rudow has contributed to publications including YachtWorld, boats. Boat Reviews. Basic Navigation Steve Colgate. Boating Guides. Boat Buyer's Guide. Boat Seller's Guide. Spring Commissioning for Your Boat. Popular Articles Related Articles 1.

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