Insulating Attic 2x4 Rafters

Option 2 has the benefit of preventing any thermal bridging via the ceiling joists.

Insulating attic 2x4 rafters.

Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. There are no soffit vents 5. A drywall sheet is 32 sqft. 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 some unfinished crawl space areas in the corners on the upper floor. Let s say you ve 384 sqft of ceiling to cover. 2x6 on 24 center floor joists no insulation between joists 3. 2x4 on 24 center rafters 3.

Two knee walls with no insulation 6. I added insulation to my attic rafters and plugged the space between the outdoors and my attic with insulation. If your rafters are only 2x4 either you ve got about 400 sqft or you ve reinforcement load bearing partitions beams somewhere. There are four roof mounted vents no ridge vent no gable vents 4.

I would really like to get more than r 13 and the current installation is probably providing r 1 with all the missing pieces. Shaded or north facing roof pitches would be the most susceptible but with only 2x4 rafters and likely r13 or less the roof deck runs warmer drier than if it were insulated to current code min. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. They are directly below the roof sheathing and are were insulated with fiberglass batts stapled between the 2x4 rafters.

Hire a pro to install spray foam insulation. You can use rigid foam panels or do as tom silva does with nearly all houses these days.