Foil-Faced Polyisocyanurate for Foundation Walls and Below Grade
2019年8月31日 · One is a foiled faced 1.5" and the other a fiberglass faced 1.75". The foil one is marketed for a lot of stuff including being explicitly marketed for exterior/ground-contact/below grade like around the perimeter of a foundation wall. The fiberglass faced is the commercial roof insulation that if often sold used.
Attaching Foil-Faced Polyiso to the Inside of a Finished Wall
2014年11月17日 · Question: what is the best way to attach rigid foam (foil faced polyiso) board to the inside of a finished wall? Can I just use longer drywall screws to go through the 1" foam and existing drywall? What if I'm going with more than that (say 2 or 3 inches of polyiso)? I'm worried that this method would have a greater tendency to pop the drywall screws out under small impacts like hanging a ...
Tape for foil-faced polyiso? - GreenBuildingAdvisor
2019年4月20日 · The “real” foil tape will feel a little like aluminum foil and will have a tendency to fold at sharp creases. The silver/plastic tapes tend to be more like “regular” tape and will resist making sharp creases. Try a quick wipe of the foil faced polyiso with some isopropyl alchohol, see if the tape sticks better after that.
Foil-faced polyiso and construction adhesive - GreenBuildingAdvisor
2015年3月10日 · Plywood – sealing all plywood seams with Siga Wigluv – 2 layers of ¾” foil faced polyiso – WRB – rainscreen – fiber cement siding. Most articles I have read recommend using a construction adhesive between the foam and plywood to be applied at the bottom/top of the wall assembly and at all outside corners.
Foil-faced rigid insulation under floor joists
2019年1月22日 · Dear GBA. After reading Building Science Corporation document BSI-009: “New Light in Crawlspaces”, I have a couple of questions about using foil faced rigid insulation (isocyanurate) attached to the bottom of floor joists.
Foil faced insulation on basement walls? - GreenBuildingAdvisor
2022年8月21日 · My typical detail is foil-faced polyiso against the concrete walls, and if the space is to be finished, fluffy insulation in a stud wall to the interior of the foam. Foil-faced EPS would work as well. Tape the seams. To gauge how much foam vs. fluffy insulation I follow the same rules as for condensation control in above-grade walls.
Which way should the foil facing on polyiso rigid foam face?
2017年12月16日 · As Dana explained, the foil facing on rigid foam has the effect of raising the R-value of an adjacent air space if there is an adjacent air space. It doesn't matter which side of the air space (or the foam board) is the "hot" side for this to work. R-value is R-value -- …
Tyvek over foil-faced polyiso - GreenBuildingAdvisor
2018年5月19日 · I was looking a the spec sheets for foil faced polyisocyanurate and it gives an R value for the foam and then a R value of the foam with an air space. For example, the 3/4" foam has an R value of 5, but the R value of the foam with 3/4" reflective air space is 7.5. If I'm installing foam, covered in Tyvek then 3/4" furring strips with siding, do I …
Polyiso foamboard (foil-faced on both sides) used in …
2016年11月13日 · Q. "Please confirm that stacking foil faced polyiso is the same as using one layer of polyiso." A. It's the same from the perspective of vapor permeance. One layer of polyiso with foil facing has a vapor permeance that is close to zero. Two layers of polyiso (or three layers) with foil facing have the same vapor permance -- that is, close to zero.
Foil-faced polyiso moldy roof sheathing Q - GreenBuildingAdvisor
2019年9月15日 · Installing 3/4" of foam board as the exterior batt baffle (R5, if polyiso, R6 if foil faced polyiso with the foil facing the air gap) for R21 cathedral ceiling batts or R23 rock wool is a good starting point. That comes to 6.25" of thickness leaving the code-prescribed 1" air gap.