WebClosed cell spray polyurethane foam (SPF) is an excellent choice for insulating attics and rim joists. Closed cell SPF is an effective thermal, air, moisture and vapor barrier. When properly applied to a thickness of one inch or more, spray foam insulation is an effective air barrier, preventing air leakage that creates drafty conditions and ... WebJan 6, 2024 · The joists and the rim board sits on a treated 2 X 8 sill plate which sits on the concrete wall. I will build 2 X 4 stud walls with 1/2" sheetrock around the perimeter of the basement. The stud walls will be approx. 1" clearance from the insulated concrete wall. Expert Member BILL WICHERS Jan 07, 2024 04:53pm #5
Extruded polysterene as attic insulation- between joists??. - Houzz
WebApr 9, 2024 · Insulating your rim joists with spray foam insulation is one way to protect them from temperature shifts, water infiltration, and air gaps, which could otherwise cause significant structural damage over time. Spray foam acts as both an insulator and sealant by expanding into cracks and crevices between boards while also providing superior ... WebFeb 27, 2011 · Maybe the thing to do is add more fiberglass over the existing so that the bays are full, install 7/16" OSB over the joists, install foam over the OSB and tape all the seams, and then install another layer of OSB or plywood as your floor. The foam is most likely in 4x8 sheets. I would use polyisocyanurate. You don't need the foil facing. scannable curseforge
What Is The Best Rim Joist Insulation? (Spray Foam Vs …
WebNov 13, 2011 · Install strips of rosin paper, cardboard, or rigid foam between the ceiling joists to limit the amount of spray foam that will ooze between the boards. Then install at least 2 inches of closed-cell spray foam in the joist bays. The installer needs to pay careful attention to be sure a good air seal is effected, from joist to joist. WebNov 24, 2014 · Rigid foam under the floor joists keeps the joists warmer, which in turn keeps them drier. It's the cold joist edges and the lack of a ground vapor barrier that led to moisture accumulation in the joists. WebJan 25, 2024 · Spray foam insulation will fill every nook and cranny in the rim joist as it creates an air barrier that will seal the area to stop any outside air from entering. The main ingredients of spray foam insulation are … scan my wifi for devices