Attic Insulation Requirements Michigan

The higher the r value the better the thermal performance of the insulation.

Attic insulation requirements michigan.

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. Michigan wisconsin and minnesota will have higher building code insulation requirements than let s say tennessee. Attic cellulose insulation cellulose insulation is recommended for the attic ceiling floor joists. R 408 31063a specific insulation requirements prescriptive.

A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. The r in r value stands for resistance. As mentioned please check your local codes and requirements before attempting anything on your own or simply call terminix for a free insulation inspection.

Insulation level are specified by r value. The average recommended level is 17 inches of r60. However there is an exception. Prior to june 22 1977 the state of michigan had no building energy efficiency requirements.

Michigan building code michigan residential code michigan energy code michigan electrical code michigan rehabilitation code for existing buildings michigan mechanical code and michigan plumbing code. The 2015 irc requires r 49 insulation for ceilings with attic spaces. 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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Insulation r value requirements for michigan what is r value. As of that date the state adopted ashrae ies standard 90 1975 statewide.

On july 27 1985 the state adopted ansi ashrae ies standard 90a 1980 statewide. Insulation shall be blown into the spaces between the ceiling floor joists. 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. Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building. In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill. Sb 719 signed in early january 1996 repealed the 1995 adoption of the 1993 mec.