Insulating Attic 2x4 Rafters

They are directly below the roof sheathing and are were insulated with fiberglass batts stapled between the 2x4 rafters.

Insulating attic 2x4 rafters.

If your rafters are only 2x4 either you ve got about 400 sqft or you ve reinforcement load bearing partitions beams somewhere. Option 2 has the benefit of preventing any thermal bridging via the ceiling joists. You can use rigid foam panels or do as tom silva does with nearly all houses these days. There are some unfinished crawl space areas in the corners on the upper floor.

Put insulation meant for 2x4 framed walls between the joists which will be the same height as the joists then lay a perpendicular layer of attic insulation maybe r 30 on top of them. I would really like to get more than r 13 and the current installation is probably providing r 1 with all the missing pieces. I added insulation to my attic rafters and plugged the space between the outdoors and my attic with insulation. Two knee walls with no insulation 6.

A drywall sheet is 32 sqft. There are four roof mounted vents no ridge vent no gable vents 4. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. It lowered my heating bill by 150 month but i ve seen some information that i may have made a mistake by cutting off the airflow in my attic.

There are no soffit vents 5. 2x6 on 24 center floor joists no insulation between joists 3. Let s say you ve 384 sqft of ceiling to cover. Whether there is a real hazard or not depends primarily on your local climate climate zone as well as your shingle color type and shading factors.

2x4 on 24 center rafters 3. Hire a pro to install spray foam insulation.