After completion of the hull, the internal components will be added. Since you already have foam insulation in place, however, you will need to find a suitable retrofit product to protect it or remove the above-grade foam (and add interior foundation insulation). These are normally used in conjunction with fiberglass or other composite fibers. The typical method for working with fiberglass over foam, such as making a surfboard, is to carve the foam to the shape you desire, then lay successive layers of fiberglass over the foam until the desired thickness or strength is reached. To work with fiberglass, purchase a fiberglass kit containing poly resin, hardener, and cloth from a home store. Can I put fiberglass directly on it without the mat? I'm not too sure though about using fiberglass cloth (more than one layer, anyway?) you can use foil or a special release wax to create a barrier. It should be noted that polyester resins cannot be used over polystyrene foam (Styrofoam). A face mask can also be worn to stop you breathing in any fibers and to reduce the powerful smell of the epoxy resin. DO NOT use Bondo on a boat, it will swell up when wet. ", "Always helpful. After a minute he had a nice styrofoam character or whatever it was. It can also serve as a tutorial for how to fiberglass/ carbon fiber over foam (or I can post that separate, I'm new, I don't know how any of this works). The fiberglass resin is a thick substance that needs a catalyst to harden. If you want a highly reinforced structure, especially if you use a cheaper and "softer" polystyrene insulation, use some fiberglass mesh on the surface and apply a coat of mortar on the mesh. Fiberglass is the least expensive type of insulation on the market, costing about half as much as foam insulation per square foot installed in most cases. Over the years with time and sun, the fiberglass strands have worked their way to the surface and now cut and irritate the oarsman. Rigid foam insulation uses one of three materials: high-quality, green-friendly polyisocyanurate; extruded polystyrene; or expanded polystyrene. You can also use foam, clay, wood... Just be sure you know how it will release. Paint will bind much better to a fiberglass finish that is slightly tacky. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Fiberglass, a material most often used for casting prop objects, is also useful in making molds of plastic or Styrofoam template objects. A review of (some of) the types of foams commonly used as substrates for fiberglass work. Boats with hull panels close to developable surfaces can use plain sheets of foam. Buy a large block of sculpting foam (from a craft shop) or, alternatively, build up the base using pieces of recycled styrofoam that you glue and pin together as described below. Fiberglass is strong across its axis but weak along its axis; if you can orient the strand mat so that its weak points are distributed along various axes instead of a single axis, you'll end up with much stronger fiberglass. SO is there a process to fiberglass over the foam? To ensure an even impregnation of resin to the cloth, try sandwiching the cloth between two larger sheets of clear plastic sheeting. We use cookies to make wikiHow great. It's been a while since I've used the fiberglass mats, and I needed a refresher, "Good and interesting information and tips. How do I add color and patterns, and can I drill holes into it? Step 6 . You don't need to rely on messy fiberglass resin to harden your Styrofoam. https://www.youtube.com/playlist?list=PLuMPs5qUmnoTlBkwedPTYQXe98uv4rsCT If you enjoy … Apply similar lay-ups (two cloth) of fiberglass over the back side to completely encapsulate the foam. ", "I am building a small boat, and your instructions about how to use the fiberglass material helped. Most teardrop shapes contain only flat or single-curvature panels so bending 'pre-surfaced' sheet material makes more sense. ", "This gave me explicit information concerning fiberglass use. wikiHow is where trusted research and expert knowledge come together. Add a bit of resin and you have strong, durable, flexible fiberglass. As you spread the resin over the fiberglass mat, make sure to apply it over corners and weak spots with the same coverage that you would over flat, easy-to-reach surfaces. After installing Styrofoam, you must use some cement or mortar to cover it up and harden the surface. Measure your resin into a metal container, then add the hardener and stir thoroughly. Thanks Mike Sign up now. In that case, we will often use scored foam (= contoured foam). Roll out the air bubbles using an air roller. to remove ads between posts. When building or remodeling a house, the issue of insulation is an important one. ", "Answered all my initial questions in one go. If you've purchased a fiberglass kit, you'll need to know how to work with these materials — or else things are about to get a little messy. Revised September 2014. diy foam boat race. Take note of the corner that has been torn off. Approved. Using fiberglass and polyester resin is not an intimidating process when it's straightforward and simple; the details in this wikiHow guide will supplement your kit's instructions nicely, assuring quality results. You can also trim your impregnated cloth into a specific shape or size by tracing onto the plastic. The dangers that fiberglass poses can be easily controlled. It is messy to work with and does not come off anything, easily! Thanks. Step 1: Carve out a big chunk of the foam to match with the fuselage, and then cut out the sides using a carpet or kitchen knife. When fiberglassing is done, cut hatches, doors, and windows from the body, then detail the interior. You need to use a resin that won't 'eat' the styrofoam. Most of the materials used to protect the foam eventually get damaged by lawn mowers, baseballs, or just normal wear and tear at the ground level. I have no idea what they all are and what the difference is. Epoxy cures harder than poly, and is therefore more resistant to scratches. 172. Allow the coating to dry overnight. By signing up you are agreeing to receive emails according to our privacy policy. Thanks. Some important tasks come before the actual blowing. Curve any corners if you are able, as it is difficult to work fiberglass mat around sharp corners. Definitions . Join the pieces. I have two questions though… Evidently there are different spray in foams available….. What is Fiberglass. action. Mix well within the can using the paint mixing spatula. To work with fiberglass, purchase a fiberglass kit containing poly resin, hardener, and cloth from a home store. I only know how to work with fiberglass so any help would be appreciated. I am completely new to the concept of fiberglass molding and this gives, "I am a novice in this trade, just getting started up to do fiberglass fish tanks. What should I use to refinish or coat the oars? What a topic, very very interesting since Im in my way to deck restoration on my 19 footer but I have a few DUH!!! Yes,you can fiberglass over bondo,rough the bondo up with 80 grit for a better bond,use a grooved roller to remove the air bubbles. To what place should you record the measurement. Have any of you got any ideas or tricks to be able to fiberglass over foam, without it disentigrating the foam ?? This keeps heat out of your house, and keeps moisture from forming. Hopefully I won't screw this up. For foam I'd be tempted to apply a layer of fiberglass first for strength then bondo over that. In the Lost Foam technique, the foam is the mold and you dissolve the foam (or just part of the foam to keep more rigidity) when the piece is done to leave you with the resulting part. Mold making and fiberglass layup. Be sure it's clean with a regimen of window cleaner, denatured alcohol, and distilled water in that order. Allow the fiberglass to harden fully -- at least two hours to ensure that it is completely set. Those familiar with our plywood epoxy (stitch and glue composite) method will recognize the procedure. The strands of glass fiber that fiberglass is made out of can be an irritant to the skin, so wear long sleeves and latex gloves while applying. When all the epoxy had cured, I sanded enough so that I could handle the part safely without getting cut on sharp edges and then cut a hole through the bottom fiberglass skin. 2003 Ford F150 4.6L: Leaking Plugs Question? Not if you want to get it back off the mold. Spread the epoxy over the fiberglass cloth surface with a plastic spreader, working the epoxy gently from the pool into the dry areas. Buy a large block of sculpting foam (from a craft shop) or, alternatively, build up the base using pieces of recycled styrofoam that you glue and pin together as described below. This step can be adequately done in an hour or half.Step 2: Once you’re satisfied with the shaping and final outline, you can wrap up the plug with a layer of packing tape to stop the epoxy from seeping into the foam. Keeping a lightweight form wouldn't hurt anything. You might be tempted to simply pour the resin over the mat and spread it, but do not; the glass mat will float to the top of the resin and show through to the finished surface. Simply use a two-part liquid polyurethane hard-coat system. Spread the resin mixture over the cloth with a … Then you could melt the foam with solvent to leave a hollow shell. 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