Insulating Attic 2x4 Rafters

I would really like to get more than r 13 and the current installation is probably providing r 1 with all the missing pieces.

Insulating attic 2x4 rafters.

A drywall sheet is 32 sqft. If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor. Let s say you ve 384 sqft of ceiling to cover. There are no soffit vents 5.

2x4 on 24 center rafters 3. 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. You can use rigid foam panels or do as tom silva does with nearly all houses these days. There are four roof mounted vents no ridge vent no gable vents 4.

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. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. 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.

If your rafters are only 2x4 either you ve got about 400 sqft or you ve reinforcement load bearing partitions beams somewhere. 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. There are some unfinished crawl space areas in the corners on the upper floor. If your attic is going to be converted into livable space then you will need to insulate the roof rafters.

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