Attic Insulation R13 Vs R30

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.

Attic insulation r13 vs r30.

Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. I think r30 goes better between 2x6 s or larger. New homes with 2x6 walls will accommodate r19 or r21 insulation. In attics we should use additional layers of.

A recent mckinsey co. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. Achieving greater r values in attics the higher the r value the better the thermal performance of the 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. Enter your data into the fields where indicated. 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.

The depth of the 2x4 is 3 5 inches which will accommodate r11 or r13 insulation. 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. 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.

Building new hame same answer. Existing 3 4 inches of insulation. 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. Installing additional insulation from r 30 to r 38 not so much.

I think r30 goes better between 2x6 s or larger. Insulation savings calculator use this insulation savings calculator to measure the financial impact of increasing your insulation performance.