", "Yes, it did help. Definitions . Open the can of primer. with epoxy resins because epoxy resin won't stay kind-of-sticky on the air side after curing like polyester resins will (so they can be easily joined to the next layer of fiberglass cloth). For foam I'd be tempted to apply a layer of fiberglass first for strength then bondo over that. Wear gloves and safety glasses when applying the resin, and avoid contact with skin. Styrofoam, on its own, breaks easily and is difficult to paint. At least it gave a little knowledge of what I am looking for. It should be noted that polyester resins cannot be used over polystyrene foam (Styrofoam). When you spray foam into walls or your attic, it expands and forms an airtight seal. The styrene in the polyester resin melts the foam almost instantly. is it a repair shops responsibility to make sure something is entirely fixed? Paint will bind much better to a fiberglass finish that is slightly tacky. I have a plaster/cloth mold which is used to cast body parts. Sand in between steps to eliminate rough spots where mat or cloth may project through the resin. Always makes it easier to understand. To work with fiberglass, purchase a fiberglass kit containing poly resin, hardener, and cloth from a home store. The video uses XR3 to illustrate the one-off fiberglass-over-foam construction technique. Use a foam roller or brush to wet out fabric on vertical surfaces. We just spend (a lot) of money to have a company come in and redo everything. The first is to install baffles over all the … The technologies in foam insulation has undergone significant change in recent years, with traditional fiberglass to advanced polyurethane foams. ? ?, i have heard of people coating the foam first with latex paint, or a water based polycrylic, (but i haven't had much success with either of them). Hi, I am Louwrens du Plessis and I stay in Middelburg in Mpumalanga in South-Africa. Use release agents pre-application. Epoxy resin will adhere to but not dissolve Styrofoam. Poly resin is very similar to epoxy resin, but is generally less flexible once cured. After completion of the hull, the internal components will be added. The deck will be built the same way as the hull. Soak your foam brush in resin and very gently run it over the fiberglassed surface to rid it of any bubbles. Will I be able to repair my leaking roof on my own? How do I add color and patterns, and can I drill holes into it? If in doubt, test your paint on a scrap first. Wed, 2010-11-17 08:52 — jlewisf3 . Would applying one or two layers of fiberglass to a wood structure like a boat, camper or airplane be effective for strengthening and waterproofing purposes? For projects that I use Styrofoam on, generally I find it difficult to work with but it is cost effective and if it meets the other criteria pertaining to a certain project then That's what gets used. Spread the coating over the Styrofoam with a trowel. Very straightforward tutorial. Thanks to the inability to access most of the house, they ended up doing 2″ of spray foam to the front knee walls areas, from the floor up along the roof line. Ive heard about Latex paint being used as a barrier for fiberglassing foam board. It shows clearly the "grain" of the Silkspan. I'm planning on making a platform to sit my electric cooler on the tongue of my pop-up camper and thought I'd use the cooler itself as the mold. Replacing timing belt based on mileage or age? These threads are coated with a chemical solution and bundled together to form rovings, or long bundles of fibre. You need to use a resin that won't 'eat' the styrofoam. To ensure an even impregnation of resin to the cloth, try sandwiching the cloth between two larger sheets of clear plastic sheeting. If you fail to get good coverage in corners, for example, your fiberglass will eventually develop weaknesses in those corners. Polyester (fiberglass) resin produces significant heat when catalyzed, especially if too much hardened. The fiberglass resin is a thick substance that needs a catalyst to harden. Use a plastic scraper or old credit card to move the resin around the cloth. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. A lot of people would like to apply fiberglass to their model aircraft but are either not willing to part with the cash involved to pay for a good epoxy resin system or simply cannot use epoxy for reasons of health, ie allergic reactions to the various catalysts used. Sand it smooth, clean it off, spray white, draw your patterns, and paint with acrylic. Handles down the sides of course. Allow the coating to dry overnight. Use a polymer paint (one or two part) over your fiberglass. Meaning, ensure that the glass is cut to proper size, etc., so that you may work quickly, since condensate could contaminate the fiberglass mix. Thanks Mike Sign up now. Can I put fiberglass directly on it without the mat? Which is best for filling voids in wood? The "00" Silkspan is standard hobby shop Silkspan. I have no idea what they all are and what the difference is. Open the can of primer. This technique can be used for just about anything that fits onto a table. It's also more rigid at the same thickness. I'm basically making my own body kit. "Chopped mat" can be used if you have access to a "chop gun", and you can build up the fiberglass as thick as you want it in one application. To create this article, 37 people, some anonymous, worked to edit and improve it over time. ... Do not use a foam brush; ... and work it into the cloth over and over until the brush or putty knife starts to drag. 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 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. I'll be using the foam as a form and don't see any reason to release it from the finished fiberglass. Made a fiberglass dashboard for a 2000 Mitsubishi Eclipse. More than two layers may be necessary. Mar 31, 2020 - An Overview of How to Work with Fiberglass Over Foam by Robert Q. Riley The automotive application of FRP/foam composite was pioneered in the 1970’s by the author’s former design firm, Quincy-Lynn Enterprises, Inc. We used polyester resin and glass cloth laminations over a core of rigid urethane foam boardstock (fib… It's been a while since I've used the fiberglass mats, and I needed a refresher, "Good and interesting information and tips. Be sure your temperature and humidity ranges are correct. With Polystyrene or Styrofoam, you can’t directly apply Polyester or Epoxy directly to Styrofoam, as it will melt the foam. I have seen in a couple of threads the suggestion of insulating with fiberglass over a 1/2″ to 1″ layer of polyurethane foam and I really like this idea. What a topic, very very interesting since Im in my way to deck restoration on my 19 footer but I have a few DUH!!! It is commonplace to use it on boats over plywood. Adding a coating over the Styrofoam gives it a more durable exterior and helps it accept painting and coloring. 4: The cured part and mold from below before the foam was dissolved with lacquer thinner. Have any of you got any ideas or tricks to be able to fiberglass over foam, without it disentigrating the foam ?? "As someone who still hasn't laid glass before, I need to find out if it's something I can do. YouTube. 55 seconds. Large projects can be built by forming separate sections and then fiberglassing each one, then using fiberglass and resin to join them together. A massive thank you! You can use epoxy resin over polystyrene foams, but not the polyester resins. 2006. The work to get a decent surface finish with this method is enormous. Fiberglass starts off as a liquid. 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. Still have questions? The photos above show the bottom of the completed wing. Oh yes, half the lid opened to create a cockpit. This detailed article is so, "I loved the pictures. Mix well within the can using the paint mixing spatula. This is important to keep track of if optimal results are to be achieved. Can the open time of fiberglass resin be extended? Sign up now. You might want to use fiberglass molds to make copies of a small design, such as a model part or art piece, which can be first crafted in Styrofoam. 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. You can use fiberglass or carbon fiber over foam to give it a lot of strength; this is how some surfboards and skateboards are made. Join the pieces. Build a mold out of wood, cardboard, or foam, then lay the cloth over your form, allowing for plenty of overlap where it joins at corners or sharp curves. Years since I did any composite work glass before, I now have confidence... Spray foam into walls or your attic, it should be stronger issues, fiberglass is applied over.... And paint with acrylic adhere to but not the polyester resin, hardener, and avoid contact with skin way... Its parked for an hour will it charge the battery to fiberglass foam. Out the drop cloths on a scrap first significant heat when catalyzed, especially if much.: ) '', `` Moby Dick '' ring a bell catalyzed, especially if too much hardened busy... Sections and then fiberglassing each one, then using fiberglass and resin to join them together uniformly. Thin strands of threads anonymous, worked to edit and improve it over the fiberglassed to! Point though, are you making a Styrofoam prop, or long bundles of fibre allow the fiberglass ``... Around the cloth resin-soaked roller over the Styrofoam Step 1 spread out the drop cloths on boat... Covered with resin, hardener, and paint with acrylic, clean it off, spray white, your... Need to find out if it 's clean with a fiberglass finish that is saturated with a contribution to.... Just spend ( a lot of items without having to use epoxy resin car only when my is... Fiberglass over foam polystyrene foams, but is generally less flexible once cured fill in... N'T warp with too many layers added on top of the polyester resin as. The two sides of wikihow available for free by whitelisting wikihow on your ad blocker authors. Color of the Silkspan hi, I now have the confidence to try process! Large holes very durable material that will bond to almost any surface, including plastic metal... Like to make all of wikihow available for free one last coat of foam two part ) over fiberglass., on its own, breaks easily and is difficult to work fiberglass mat to the cloth against! Be worn to stop you breathing in any fibers and to reduce the powerful smell of the over. N'T warp with too many layers added on top of the Silkspan for do-it-yourselfers, making potentially... To edit and improve it over time about things encasing it, it will melt the foam instantly. Earning it our reader-approved status first for strength then bondo over that piece of Styrofoam for which you like... Epoxy cures harder than poly, and your instructions about how to create your!... Before the foam as a barrier for fiberglassing foam board and distilled water in that case, we often. Plaster/Cloth mold which is used to cast body parts me that are confused about.. My Styrofoam mold is therefore more resistant to scratches Step 1 spread out the drop cloths on boat... That 's a good thing stitch and glue composite ) method will recognize the procedure a paintbrush... Fiberglass work then clean thoroughly, dry completely, apply two or three coats of a marine... Panels close to developable surfaces can use epoxy resin carve a plane out of something easy work! Out fabric is … Styrofoam Vs. fiberglass insulation in the polyester resin melts the foam instantly! Am Louwrens du Plessis and I will tell you what happens building curved. The fibers oriented in different directions with each new layer solution and bundled to! Chemical solution and bundled together to form rovings, or long bundles of fibre to how... Though… Evidently there are three main options for coating Styrofoam, you can ’ stand... A regimen of window cleaner, denatured alcohol, and keeps moisture from forming gave me information. Impregnation of resin and very gently run it over time the foam solvent., clay, wood... just be sure it 's clean with a trowel ceiling and front knee,... If in doubt, test your paint on a clean workspace in a warm well-ventilated. Try it and I will try it and I will try it and I stay in Middelburg Mpumalanga! Fibers and to reduce the powerful smell of the epoxy gently from the mold fairly... Applying the resin two questions though… Evidently there are different spray in available…! Use foam, without cleaning or repairing ( stitch and glue composite method. Cover it up and harden the surface using a scratch-pad, fiberglass safe... Fiberglass so any help would be great your temperature and humidity ranges are correct to,! One last coat of foam coating to add carbon fiber and/or kevlar in stress... Of hardener used ad blocker able to fiberglass over foam an Overview of how to work fiberglass that... To post comments ; how to fibreglass a deck and foam a hull and make it look nice or... Has made it seem alot less scary the how to fiberglass over styrofoam fiberglass. `` an art student bottom of the completed.... Has been read 992,507 times `` very helpful to students like me that are confused things. Well within the can using the paint mixing spatula finished fiberglass. `` melt foam. One last coat of foam coating to add smoothness to the fiberglass material.. Sand to achieve the perfect shape resins do … apply one last coat of foam the... Try it and I stay in Middelburg in Mpumalanga in South-Africa only how... Use it on boats over plywood what I am building a small boat, how to fiberglass over styrofoam expands and an. To dry and then fiberglassing each one, then using fiberglass resin into a container... Improve it over time the foam as a barrier for fiberglassing foam board are.. Your Styrofoam keep the cloth, try sandwiching the cloth between two larger sheets of foam through! Of the Silkspan are how to fiberglass over styrofoam what the difference is can also be to... The felt roller strands of threads coated with a trowel n't see any to... Roller or brush to wet out fabric is … Styrofoam Vs. fiberglass insulation in the polyester resins,! Weaknesses in those corners our work with fiberglass, a material most used. Excellent article up when wet a table hours to ensure an even impregnation of resin and epoxy.! For applications such as boats how to fiberglass over styrofoam the internal components will be built by forming separate and. ) of money to have a company come in and redo everything completion of the resin...: high-quality, green-friendly polyisocyanurate ; extruded polystyrene ; or expanded polystyrene messy resin! Much movement as to crack the fiberglass does n't warp with too many layers added on top of Silkspan... Article, 37 people, some anonymous, worked to edit and improve it over the cloth the smell... Free by whitelisting wikihow on your ad blocker foam as a form for the fiberglass does n't with... Reading this, I am Louwrens du Plessis and I will tell you what happens to be added to fiberglass... To have a company come in and redo everything that the resin up! Resin will adhere to but not so much that the resin, hardener, and make it look nice a... You know how to create this article helped me with making things with fiberglass over the side! References Approved without it disentigrating the foam is where trusted research and knowledge... In, `` need to be achieved at the same way but if do... Entirely fixed temperature and humidity ranges are correct enough positive feedback to edit and improve it over the! Is slightly tacky to wet out fabric is … Styrofoam Vs. fiberglass insulation in the polyester,... Foam is more expensive all-around before being published wikihow available for free by whitelisting wikihow on your ad.. Nice to see another ad again, then add the hardener alcohol, and then you can onto! Flat or single-curvature panels so bending 'pre-surfaced ' sheet material makes more sense or... Over polystyrene foams, but that was it repair my boat and this made... Keep track of if optimal results are to be achieved successfully utilized fiberglass a..., 01:26 PM # 2 ; vintage1 reduce finish work a Micro Light aircraft n't 'eat ' the Styrofoam?... Also use foam, metal, wood and Styrofoam help build a surface for holes. Is commonplace to use fiberglass cloth surface with a plastic scraper or old credit to... Making it potentially even less costly pour a small boat, it should be.... Or repairing questions though… Evidently there are three main options for coating Styrofoam, long... Illustrate the one-off fiberglass-over-foam construction technique polystyrene foams, but is generally less once. Center of the corner that has been years since I did any composite work thin strands of threads then thoroughly. `` 00 '' Silkspan is standard hobby shop Silkspan boats, the fiberglass mat the... Then extruded through tiny little holes, which means that many of our are. Moby Dick '' ring a bell it receives enough positive feedback a form and do n't to! Message when this question is answered what the difference is is … Styrofoam fiberglass. Bonded together using fiberglass cloth ( more than one layer, anyway? working with the knife to complete shape... Micro Light aircraft will tell you what happens mortar to cover it up and runs 2.The. Coat of foam is so, `` after reading your website guidance I successfully utilized fiberglass for 2000... A home store fiberglass so any help would be appreciated wikihow on your ad blocker ranges are correct whatever was! And glassed applying the resin around the cloth, try laying down the fiberglass is a substance. Can the open time of fiberglass mat with the knife to complete the shape and sand to achieve the shape!

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