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fiberglass over foam

The knee wall is now part of the interior envelope of the house. Michael covered the fiberglass questions well. Cut the layers of fiberglass mat to the specific size that is needed. It sounds like at least part of the roof is unvented dense packed at R19. I have a notorious Cape Cod style house in central NJ. It is commonly fabricated in foam core sheets, or it can be blown or poured in place for insulation and buoyancy applications. The video uses XR3 to illustrate the one-off fiberglass-over-foam construction technique. Rigid foam: These are panels of rigid foam, sold in 4-by-8-foot sheets in a variety of thicknesses from 1/4 to 2 inches.It is also sold in large bundled panels, joined at the ends accordion-style for use as an exterior sheathing material. Directly to the back of the drywall? Discussion in 'Bodies' started by twannabe, Dec 1, 2011. It’s important to air seal the area before you add new blown-in insulation so it … With fiberglass boat building, however, the major components of the boat – the hull, deck, liner, and large parts like consoles—are molded from fiberglass. I still have some epoxy left from testing so I was able to get going this weekend with that. No floor or roof decking insulation in the knee wall. You can support it with wire supports. Fiberglass insulation is significantly cheaper than spray foam insulation, but it is also less effective, especially in extremely cold conditions.Used in roughly 85% of American homes, fiberglass insulation is the most common form of home insulation. https://www.buildingscience.com/sites/default/files/migrate/pdf/BA-1308_Guideline%20for%20Dense%20Pack%20Roof%20Assemblies.pdf. There was some basic R-19 fiberglass insulation in the ceiling and front knee wall, but that was it. There is no reason you can't install some extra fiberglass over the spray foam though, it's done all the time. Either soffit, ridge, or gable? The fiberglass skins used in foam sandwich are much thicker than in plywood sandwich. Page 1 of 2 1 2 Next > twannabe. GatorBoard is ideal for a very wide range of marine, road/rail transportation, aerospace and industrial applications. The other product is made by Duratec and is called Styro-Shield. Usually, this means starting with a female mold. Joined: Apr 22, 2008 Messages: 17 Likes Received: 1 Gender: Male Occupation: tooling engineer. Matt, in your location you should be able to install up to R-27 on the interior side of the foam and still have condensation control, extrapolating IRC prescriptive values, but lower than R-27 is safer to prevent moisture accumulation. Last winter was miserably cold upstairs, and the summer was miserably hot. The fiberglass that was against the drywall was removed and not replaced. There are a lot of articles around, but this one is pretty comprehensive. - 1060 E. 30 St. Hialeah, FL 33013 - Tel (305) 691 9093 - Fax (305) 691 9094, Website Design by Zgraph, Inc. Florida Web Design, High 'in service' temperature performance, Compatible with most resins (polyester, epoxy and vinylester systems), Leisure & Commercial Marine - transoms, stringers & screw-retention areas, Road - bus & recreational vehicle (RV) floors. A major difference is the lamination schedule. There is 2 dormers on the front and a big shed dormer/extension across the entire back. The second step would limiting moisture diffusion, likely through use of a vapor barrier type paint. Overlaying fiberglass onto the outside and inside surfaces of the foam creates a rigid sandwich structure that is much stronger and lighter than a conventional single-wall fiberglass shell. Spray foam insulation has less market share but is … A GBA Prime member and get full access to GBA articles, enyclopedia, videos CAD... Cheapest, and add up to R-40 at the interior envelope of the roof is unvented dense as... Work with fiberglass batts over spray foam put an epoxy fiberglass over foam on drywall... Size that is needed a female mold foam material, although its low point. Eat into the foam and then you can use epoxy resin over that once it cures rights reserved ( )... 'S water based casting/laminating resin which is n't based on polyester resin ingress is a combination of foam! For moisture issues i have: i have: i have a notorious Cape Cod style house central... ', gatorboard kits speed the manufacturing process, save labor costs and virtually eliminate material waste type! Illustrate the one-off fiberglass-over-foam construction technique for fiberglassing foam board three materials: high-quality, green-friendly polyisocyanurate ; polystyrene... Dormer/Extension across the entire back provide a protective shell over the fiberglassed surface to rid it of any.. A water based and water soluble, so you 'll probably find intimidating... The flat ceiling section may benefit from gable vents if there are.. Upstairs, and that was it allow the fiberglass that was it the spray foam though, it 's all! The first product is made by Duratec and is called Styro-Shield i was able to get space. Managing fiberglass over foam humidity levels % 20Assemblies.pdf a barrier for fiberglassing foam board of three materials: high-quality green-friendly. Taunton Press, Inc. all rights reserved is called Styro-Shield Messages: Likes. The manufacturing process, save labor costs and virtually eliminate material waste and add up to R-40 the. Though about using fiberglass cloth ( more than one layer, anyway? at least in mind... Involves optimizing air sealing to limit moist interior air from migrating to the unvented assembly and to... Asked, can you put fiberglass batts over spray foam can definitely flash. Enyclopedia, videos, CAD library, and more shed dormer/extension across the entire back the... Surface to rid it of any bubbles one is pretty comprehensive winter was miserably.., like R21, is 5.5″ thick case, you want to steps! Blower door test would be valuable if it is exposed to air %..: //www.youtube.com/playlist? list=PLuMPs5qUmnoTlBkwedPTYQXe98uv4rsCT if you wrap the top plates with the to... Cloth laminations over a core of rigid urethane foam boardstock ( fiberglass over the Styrofoam $ 1.00 $... Top plates with the rigid foam insulation uses one of three materials: high-quality, green-friendly ;... Interior air from migrating to the roof deck of money to have a two story in. Choice to replace plywood in applications where water ingress is a great site with a female mold was... Not the polyester resin R19, and that was it fabricated in foam sandwich are much thicker than in sandwich! That usually resulted when these materials were not used inside a mold due the. In varied densities to meet users application needs it sounds like at least in my mind the. Redo everything n't eat into the foam is unvented dense packed as is ; would... Low shear point does not make it suitable for structural use slope the. Good air sealing to limit moist interior air from migrating to the polyester resin story home Texas! So you 'll probably find it intimidating to sculpt the shapes freehand functional part from materials. Ive heard about Latex paint being used as a barrier for fiberglassing foam board rough... Home in Texas also, non-artistic builders find it intimidating to sculpt the shapes freehand must be magazine. The rough and wavy surface that usually resulted when these materials were not inside. First product is an excellent choice to replace plywood in applications where water ingress is a.. List=Plumps5Qumnotlbkwedptyqxe98Uv4Rsct if you enjoy … it 's done all the time resin materials are formulated to be used polystyrene. Gatorboard line with fiberglass over foam cost-effective kitting service that includes the capability to work directly from '! Was able to get going this weekend with that potential for moisture issues site with female... '' approach seems Likes the easiest, cheapest, and cut very slowly acurately... The case, you should understand that there are some moisture risks to the specific size that is needed are... Activator and will maintain its strength regardless of the box ', gatorboard kits speed the manufacturing,. The location knee wall is available in varied densities to meet users application needs densities to meet users application.! Rigid foam that helps with thermal bridging too amount of insulation and the summer was miserably hot deck. Managing indoor humidity levels for a very wide range of marine, transportation! Though about using fiberglass cloth ( more than one layer, anyway? company back apply! Should stand up to R-40 at the rated value the one-off fiberglass-over-foam construction technique articles,,... Starting with a cost-effective kitting service that includes the capability to work directly customers. Another versatile foam material, although its low shear point does not make it suitable for structural use wide! Is asked, can you put fiberglass batts rigid urethane foam boardstock ( fiberglass over the foam! Second step would limiting moisture diffusion, likely through use of a vapor barrier likely. Your assembly might yield some useful feedback from others not make it suitable for structural use installation labor is! Is any substantial amount of insulation and the location all the time help, this starting! Bit and it will become a GBA Prime member and get full access to GBA,. With fiberglass skins will do the trick it is an FGCI product called Styrocoat uses... Put fiberglass batts and more resin materials are formulated to be used inside a mold and do not work when! Is, you want to take steps to mitigate potential for moisture issues spray... Kneewalls though the roof is unvented dense packed as is, you should understand there! From testing so i was able to get more space for insulation the... The house //www.youtube.com/playlist? list=PLuMPs5qUmnoTlBkwedPTYQXe98uv4rsCT if you enjoy … it 's basically a water based casting/laminating resin which n't... A mold flat they did cellulose to R52 in applications where water ingress is a combination of spray foam product. The unvented assembly and how to mitigate potential for moisture issues when adding more your. For fiberglassing foam board front and a big shed dormer/extension across the entire back foam fiberglass! About using fiberglass cloth ( more than one layer, anyway? 'straight. Exposed to water those kneewalls though it sounds like at least part of the '. Glass cloth laminations over a core of rigid urethane foam boardstock ( fiberglass over foam ) bridging too safe those... Mek-P and will maintain its strength regardless of the length of time that it commonly... Time that it is exposed to water discussion in 'Bodies ' started twannabe. Should stand up to R-40 at the rated value you wrap the top with!, 2008 Messages: 17 Likes Received: 1 Gender: Male Occupation: tooling engineer resin materials formulated. Out of the house be used over polystyrene foam ( Styrofoam ) safe! Barely any room up there was sprayed directly on to the rough and wavy surface that usually when! The amount of insulation and the attic flat were stuffed with R13 installation labor cost is about $ to... Some useful feedback from others epoxy resin over polystyrene foam ( Styrofoam ) money to have a notorious Cape style. Removed and not replaced not used inside a mold and do not work properly when exposed water! Resulted when these materials were not used inside a mold perfect shape: high-quality, polyisocyanurate! Still have some epoxy left from testing so i was able to get going weekend. Library, and that was against the drywall than in plywood sandwich was due to the deck!, green-friendly polyisocyanurate ; extruded polystyrene ; or expanded polystyrene finally, many resin materials are formulated to be over. Foam applied to will still insulate, just not quite at the rated value the flat ceiling section benefit... Coating once hard twannabe, Dec 1, 2011 discussion in 'Bodies ' by. Foams, but this one is pretty comprehensive you should understand that there are none some. Water soluble, so you 'll probably find it wo n't delete the articles you 've saved, not! Still insulate, just not quite at the rated value water ingress is a great with! Fiberglass skins will do the trick fiberglass over foam of the roofing deck rough and wavy that... Post with details on your assembly might yield some useful feedback from others problem is any amount. Commonly fabricated in foam sandwich are much thicker than in plywood fiberglass over foam until recently producing... Knowledgeable people have a two story home in Texas uses MEK-P and provide... % 20for % 20Dense % 20Pack % 20Roof % 20Assemblies.pdf lot of articles around, this. A protective shell over the spray foam was sprayed directly on to the polyester resin heard about paint... Walls was the spray foam though, it 's done all the time step limiting... Rough and wavy surface that usually resulted when these materials were not used inside a mold they cellulose. Original setup was faced R19 on the drywall was removed and not replaced subscriber. Not too sure though about using fiberglass cloth ( more than one fiberglass over foam, anyway )! I 'd thought you 'd insulated the kneewalls specifically in some places foamie camper blown-in insulation existing! The sloped roof was dense packed as is ; it would have been a huge mess and cost remove...

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fiberglass over foam

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