Which way should the foil facing on polyiso rigid foam face?
2017年12月16日 · I was thinking of not sealing the perimeter prior to installing the rigid foam to give any moisture entering the cavity an avenue to escape. Although no moisture should really be entering the cavity from the inside and to the best of my knowledge, polyiso is vapor-impermeable (not sure about the 1 part foam but I think it is vapor-permeable).
Video: How to Install Rigid Foam Insulation Outside a House
2010年1月6日 · We wrapped the house in this video with 4 inches of polyisocyanurate in two staggered 2-inch layers. This thickness strikes a balance between ease of installation and maximum R-value. If the foam is any thicker, it’s hard to hit studs when driving screws. Plus, combined with 5-1/2 inches of cellulose in the stud bays, 4 inches of rigid foam ...
Installing Rigid Foam Above a Concrete Slab
2019年1月11日 · I used spray foam to fill gaps between the floor foam and the concrete wall. My first layer of 7/16" OSB butts to the vent material. My first layer of wall foam (2-in. EPS Type 1 - 1 lb/ft³ so maybe I have Type 2?) sets on the 1/2-in. vent material. The second layer of wall foam sets on the first layer of 7 /16" OSB.
How to Install Rigid Foam Sheathing - GreenBuildingAdvisor
2011年9月30日 · Currently, I'm planning on: 1. installing the rigid foam directly over the logs (since it's a kit home and the logs are milled, the exterior surface is largely in plane and free from excessive bumps, warping and inconsistencies); 2. then …
How to Finish Exterior Foundation Insulation
2010年11月15日 · One-inch vertical leg gets nailed to the bottom 2-by plate, through the 1 in. foam. Middle, "horizontal" leg that is not horizontal covers the thickness of foundation foam, and the last leg extends well into the ground. Just needed hand brake and …
Rigid foam attached to underside of rafters: Good idea?
2012年9月19日 · At 600 board feet you can get the spray foam cost down to about $1.20/board-foot, compared to $3.35/bf-ft in the 12 b.f. FrothPaks, or $5+ for 1-part foam cans. Spraying o.c. foam on the underside of the roof deck would provide a more reliable air seal, but has long term issues related to roof rot since the unvented roof deck would get a lot of ...
Can I add foam insulation to the inside of a wall instead of exterior ...
2010年11月22日 · myuschak | Posted in Green Building Techniques on November 22, 2010 10:26am. I live in a three story end unit town house. I am getting ready to remodel the master bedroom. Our closet is on the north exterior wall and I was looking to remove the existing sheet rock on the north wall and install new insulation along with stryofoam insulation board.
Walls With Interior Rigid Foam - GreenBuildingAdvisor
2015年3月27日 · In the 1980s, most cold-climate builders were taught that walls needed an interior vapor retarder, and needed to be able to dry to the exterior. When a few pioneers started installing exterior rigid foam, some people thought the practice was risky. “Rigid foam is a vapor retarder, so it belongs on the interior,” some old-time builders opined.
Choosing Rigid Foam - GreenBuildingAdvisor
2016年2月5日 · The R-value of EPS ranges from about R-3.6 to R-4.2 per inch. In most cases, the higher the density of the EPS, the higher the R-value per inch. The R-value of XPS is R-5 per inch. The R-value of polyisocyanurate is R-5.7 to R-6 per inch (although cold-climate builders sometimes use a lower R-value because polyisocyanurate performs poorly at ...
Tips for Cutting Rigid Foam Insulation - GreenBuildingAdvisor
2015年7月6日 · The foam for the roof valley was cut with a bevel for a tight fit and as a bonus this also resulted in offset seams (however, I did have to first handcut the full sheet using a fine tooth saw). I designed the corners of the house to use 2x4's that float on a channel in the foam and screw through to the inner frame and so the foam corner had to ...