Nettet23. mar. 2024 · 2×8 rafter cathedral ceiling insulation. Looking for info on improving insulation for a cathedral ceiling in a zone 5b house built in the 70’s 2×8 rafters. … Rafter insulation refers to the pitched part of a roof, which can be insulated with slabs or rolls depending on local availability. In some countries granulate is also used to insulate between the rafters. ROCKWOOL rafter insulation helps to provide thermal, fire and acoustic protection for roof spaces.
Insulating a Flat Roof - GreenBuildingAdvisor
Nettet30. mai 2024 · Foil-faced iso-board can be cost-effective insulation for finished attics and cathedral ceilings. Spray foam is a very expensive option, however. Foam-board insulation would be a more economical, especially if you are supplying the labor (see photo). The foam board can be nailed to the bottom of the rafters, which is pretty … Nettet30. jun. 2015 · Getting R38 in roof with 2x8 rafters Ask Question Asked 7 years, 8 months ago Modified 4 years, 6 months ago Viewed 4k times 3 I was planning to use foil faced … uk crbs limited
Insulating rafters with R-30, extending depth of 2x8 with 2x4
NettetInsulation. If your attic is going to be converted into livable space, then you will need to insulate the roof rafters. Install ventilation baffles into the space between the rafters before you install the insulation--usually by stapling into place. The baffles will allow circulation to continue even though insulation has been installed ... Nettet26. mai 2011 · Another option would be 3/8 or 1/2-inch plywood gussets. And yet another option would be to use Simpson connectors, and run the 2X4s perpendicular to the 2X8s to eliminate the thermal bridging, and use blown in fiberglass insulation. Yeah, run your furring at right angles to the rafters. You can use Simpson anchors or toe-screw. Nettet7. feb. 2011 · The roof rafters are 2x4's and spaced about 18 OC. ... It dried rapidly after removing the paneling and insulation. The flat ceiling above is drywall. I want to possibly sister on some 2x6's or even 2x8's to strengthen things up and allow room for more insulation and also ventilation and then drywall over it. ukc rally rules \u0026 regulations