Minimum Attic Insulation

Framed wall insulation must meet or exceed r 13.

Minimum attic insulation.

The department of energy recommends these minimum r values for unfinished unconditioned attics. The main factors that impact the cost are. Insulation level are specified by r value. Add the right kind of insulation.

The change that occurred in the attic insulation in the ontario building code was in the minimum required r value. The greater the number the greater the resistance to heat movement. Recommended home insulation r values. However there is an exception.

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. For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Residential requirements for insulation are divided by the location in the home. The higher the r value the better the thermal performance of the insulation.

Inspecting your attic insulation. R value is a measure of insulation s ability to resist heat traveling through it. 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. As mentioned please check your local codes and requirements before attempting anything on your own or simply call terminix for a free insulation inspection.

The insulation s ability to resist heat flow determines its r value. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

The numbers are based on your house s location and climate zone. These are changes made in order to increase the energy efficiency of the home and thus also save energy. Ceiling insulation must be much higher at r 30 and a raised floor must be at least r 13. The 2015 irc requires r 49 insulation for ceilings with attic spaces.

R values identify insulation levels. The recommended r value has been raised from r 50 to r 60 in order to increase the insulation of the attics. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. 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.

R value is a measure of insulation s ability to resist heat flow. The higher the r value the better the thermal performance of the insulation. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.