Does Spray Foam Insulation Off-Gas Poisonous Fumes?
2010年2月17日 · Spray-foam insulation has become a weapon of choice for many builders and homeowners trying to build tight, energy efficient houses. And with its long list of attributes, that's no wonder. It fills tiny cracks and fissures in walls and roofs to form an effective air seal. The high R-values of closed-cell foam pack a lot of punch in a small space, and closed-cell versions can …
Is closed-cell spray foam fire resistant or does it spread fire?
2012年10月18日 · I was told by the foam company (that does both kinds) that open cell spray foam does not have these stringent requirements because it is more fire resistant. GBA Editor Martin Holladay | Oct 18, 2012 10:32am | #4
Closed-cell spray foam insulation: between rafters or joists?
2018年10月19日 · Because I wanted a whole house attic fan in our new cabin and it looked like the fan (plus the windy location) might end up disturbing blown-in insulation, we opted to go with closed-cell foam. The insulators built up a "false ceiling" between the trusses and the roof deck to allow air movement from the soffit to the ridge vents, then built up ...
Exterior insulation with closed-cell spray foam walls
2020年5月10日 · Then you can do still rigid foam outside and (a) the wall assembly can still dry to the inside and (b) thermal bridging would be less of an issue because the studs would be protected by the exterior rigid foam. The only case I can think of for closed-cell spray foam in walls would be if you were in a hurricane zone and wanted the benefit of ...
What type of insulation should I install under the floors of pier ...
2010年12月2日 · The easiest solution -- but not the cheapest -- is closed-cell spray polyurethane foam. Another option is rigid foam (EPS, XPS, or polyiso). You can cut and fit the foam between the joists -- a laborious process -- or, better yet, extend it across the bottom of the joists.
Closed Cell Foam Insulation around downlights and other heat …
2020年9月13日 · However, the architect felt that approach was unsafe and ordered the contractor to cut/scrap away the foam directly around the lights (around 4″) and install Mineral Wool. So now he has Closed Cell insulation everywhere in the addition except around those downlights. Was this a good idea?
Will closed-cell spray foam rot wood in a crawlspace over time?
2019年2月25日 · The idea of having a liner and dehumidifiers that have to be managed under the house for $15k initial cost and $100-$200 per month on dehumidifiers vs. spraying closed cell and making a complete barrier; seems like a no brainer to me. Closed cell seems like the obvious choice and reading this case study from LSU seems to back that up substantially.
How much closed cell spray foam do I need? - GreenBuildingAdvisor
2012年11月15日 · At 2" all HFC blown closed cell foams are class-II vapor retarders, and would be at least somewhat protective of the roof deck, but not necessarily the fiber insulation. Since it limits the adsorption rate of the roof deck as effectively as if it had been placed on the interior side, it then becomes only a question of whether the fiber becomes ...
Should I use Closed Cell foam on the underside of my hardwood …
2011年3月23日 · Renovating an old house. I am going with closed cell on the attic roof (rafters are only 2x4 so open cell not an option). The same guy thinks I should use closed cell (just 1") under the floor of my house. Of course others say I should use open cell. My hardwood floor is White Oak from the 20's.... I live in Austin, TX, so some humidity. There is nothing under it except the …
Smart or not? Combining closed-cell and open-cell foam
2014年1月23日 · The closed-cell spray foam layer will help prevent interior moisture that diffuses through the open-cell foam from reaching the cold roof deck. That makes sense. As with any spray foam job, success depends on choosing a skilled contractor who installs the foam carefully and doesn't skimp on foam thickness.