Foil-faced polyiso and construction adhesive - GreenBuildingAdvisor
Mar 10, 2015 · 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 Polyisocyanurate for Foundation Walls and Below Grade
Aug 31, 2019 · 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.
Tape for foil-faced polyiso? - GreenBuildingAdvisor
Apr 20, 2019 · 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.
Which way should the foil facing on polyiso rigid foam face?
Dec 16, 2017 · 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 -- …
Foil faced insulation on basement walls? - GreenBuildingAdvisor
Aug 21, 2022 · 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.
Foil-faced rigid insulation under floor joists
Jan 22, 2019 · 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.
Attaching Foil-Faced Polyiso to the Inside of a Finished Wall
Nov 17, 2014 · Q. "What is the best way to attach rigid foam (foil faced polyiso) board to the inside of a finished wall?" A. Generally, the rigid foam is held in place with a few cap nails. Eventually the foam is further secured with furring strips or drywall. Q. "Can I just use longer drywall screws to go through the 1-inch foam and existing drywall?" A ...
Painting foil-faced foam board - GreenBuildingAdvisor
Mar 1, 2019 · If you want to paint the foil on foil-faced polyiso, you’re basically painting metal, so a paint designed for a metal surface should definitely work. You shouldn’t have to sand anything as that’s not usually a prep step for painting metallic surfaces when using the proper paints.
Condensation on foil-faced polyiso panels? - GreenBuildingAdvisor
Nov 27, 2013 · I stacked a bunch of 2" thick foil-faced polyiso insulation boards in the basement of our house, to prep for a major remodeling project. I returned a week later and noticed a puddle of water under the polyiso boards. (This happened in June, in a house along the shore in Massachusetts. The weather was humid, as usual.) "Oh, no! A water leak!", was my first thought. I examined all of the copper ...
Polyiso foamboard (foil-faced on both sides) used in …
Nov 13, 2016 · When you wrote, "a continuous layer of 4.5-inch polyiso, foil faced, nailed directly to top of rafters," I think you meant to write "nailed directly to the underside of the rafters.") 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.