Attic Insulation R13 Vs R30
Building new hame same answer.
Attic insulation r13 vs r30. In attics we should use additional layers of. Enter your data into the fields where indicated. I think r30 goes better between 2x6 s or larger. I think r30 goes better between 2x6 s or larger.
Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. R13 is pretty common for wall use but if you have staggered studs or a 2x6 stud wall then r30 would probably be a good idea. Wall insulation whenever exterior siding is removed on an. Existing 3 4 inches of insulation.
An existing house with r 13 in the attic and installing r 30 v r38 is a no brainer. It might fit but it would have to be compressed so much that it would probably lose some of its r value. The key is to figure out how much it s going to cost you to get those savings. The material cost is minimal compared to the fixed costs of the contractor to do either or your time to pickup a blower and material.
R13 is pretty common for wall use but if you have staggered studs or a 2x6 stud wall then r30 would probably be a good idea. Add insulation to attic. Improved insulation is a good step toward improving building efficiency particularly since the atlanta based american society of heating refrigerating and air conditioning engineers ashrae increased minimum roof insulation levels in 2007 in its standard 90 1 the first increase in 18 years and if that isn t enough to spur someone into action. New homes with 2x6 walls will accommodate r19 or r21 insulation.
Going from r 11 to r 13 just involves using a different insulation but going from r 13 to r 15 the whole wall r value for 2x6 walls requires going from 2x4 to 2x6 walls and thus more insulation more lumber and doors and windows with wider jambs. A recent mckinsey co. Attic existing 3 4 inches of insulation uninsulated floor uninsulated wood frame wall insulated wood frame wall 1 r30 to r49 r25 to r30 r13 2 r30 to r60 r25 to r38 r13 to r19 n a 3 r30 to r60 r25 to r38 r19 to r25 and add r5 insulative wall sheathing beneath the new siding 4 r38 to r60 r38 r25 to r30. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
The depth of the 2x4 is 3 5 inches which will accommodate r11 or r13 insulation. It might fit but it would have to be compressed so much that it would probably lose some of its r value.
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