The average recommended level is 17 inches of r60.
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.
Prior to june 22 1977 the state of michigan had no building energy efficiency requirements.
On july 27 1985 the state adopted ansi ashrae ies standard 90a 1980 statewide.
R 408 31063a specific insulation requirements prescriptive.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
R value is a measure of insulation s ability to resist heat traveling through it.
Sb 719 signed in early january 1996 repealed the 1995 adoption of the 1993 mec.
Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building.
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.
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.
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.
The higher the r value the better the thermal performance of the insulation.
Insulation is generically thought of as a material that keeps things warm but insulation like foam can also help to keep a home cool.
In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill.
Inspecting your attic insulation.
The 2015 irc requires r 49 insulation for ceilings with attic spaces.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of 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.
Attic cellulose insulation cellulose insulation is recommended for the attic ceiling floor joists.
Rule 1063a section r402 2 12 of the code is amended to read as follows.
However there is an exception.
Insulation r value requirements for michigan what is r value.
Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.
A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly.
Insulation level are specified by r value.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Michigan wisconsin and minnesota will have higher building code insulation requirements than let s say tennessee.
Insulation shall be blown into the spaces between the ceiling floor joists.
