Minimum Attic Insulation

For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6.

Minimum attic insulation. Insulation levels are specified by r value. Add the right kind of insulation. Residential requirements for insulation are divided by the location in the home. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.

Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves. R values identify insulation levels. R value is a measure of insulation s ability to resist heat flow.

The insulation s ability to resist heat flow determines its r value. These are changes made in order to increase the energy efficiency of the home and thus also save energy. Insulation level are specified by r value. The main factors that impact the cost are.

Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. Inspecting your attic insulation. However there is an exception. Framed wall insulation must meet or exceed r 13.

The average recommended level is 17 inches of r60. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. R value is a measure of insulation s ability to resist heat traveling through it. The recommended r value has been raised from r 50 to r 60 in order to increase the insulation of the attics.

The higher the r value the better the thermal performance of the insulation. The department of energy recommends these minimum r values for unfinished unconditioned attics. The greater the number the greater the resistance to heat movement. 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.

As mentioned please check your local codes and requirements before attempting anything on your own or simply call terminix for a free insulation inspection. Recommended home insulation r values. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. According to home advisor insulating your attic can cost between 1700 to 2100.

The higher the r value the better the thermal performance of the insulation. The numbers are based on your house s location and climate zone. The 2015 irc requires r 49 insulation for ceilings with attic spaces.