Attic Insulation Requirements Michigan

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.

Attic insulation requirements michigan.

Inspecting your attic insulation. 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. In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill. 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. Insulation shall be blown into the spaces between the ceiling floor joists. Prior to june 22 1977 the state of michigan had no building energy efficiency requirements. R value is a measure of insulation s ability to resist heat traveling through it.

Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Baffles must be provided between the roof rafters at the juncture with the ceiling floor joists to ensure free air movement from the eaves to the roof ridge and vents. The r in r value stands for resistance.

As of that date the state adopted ashrae ies standard 90 1975 statewide. R 408 31063a specific insulation requirements prescriptive. Michigan wisconsin and minnesota will have higher building code insulation requirements than let s say tennessee. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.

Sb 719 signed in early january 1996 repealed the 1995 adoption of the 1993 mec. The 2015 irc requires r 49 insulation for ceilings with attic spaces. A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

Insulation level are specified by r value. Insulation r value requirements for michigan what is r value. 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. 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 higher the r value the better the thermal performance of the insulation. On july 27 1985 the state adopted ansi ashrae ies standard 90a 1980 statewide. Rule 1063a section r402 2 12 of the code is amended to read as follows. Insulation is generically thought of as a material that keeps things warm but insulation like foam can also help to keep a home cool.