Foam board the last option that i considered and the one i m using is foil faced polyiso insulation board.
Foam board ceiling insulation.
2 in x 4 ft x 8 ft 1 faced polystyrene garage door foam board insulation.
Do no use a vapor barrier under the insulation.
I m using 2 foam board 2 foil faced polyiso r value is approximately r14 fastened to the bottom of the 2 6 truss chord which leaves a nice 2 1 2 air space.
Rigid boards are manufactured from either.
Seal the insulation or the ceiling surface below against air leakage.
5 panels with 97 reviews.
For pricing and availability.
R5 radiant acoustic insulation kit stc 19 5 piece with 172 reviews and the amvic multipurpose high density insulation kit r10 2 3 8 in.
Foam board insulation is easy to use and is a great diy way to add some insulation.
Some types of thicker foam board insulation are available but they may need to be special ordered.
Ceiling foam board insulation.
For pricing and availability.
You don t want moist air leaking into the roof cavity.
The air space will be continuous down to the soffit vents and.
It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.
2 in x 4 ft x 8 ft.