Michigan Attic Insulation Requirements

The minimum ceiling insulation r values shall be r 24 in zones 5 to 7.

Michigan attic insulation requirements.

Recommended insulation levels for retrofitting existing wood framed buildings. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Cellulose insulation cellulose insulation is recommended for the attic ceiling floor joists. Inspecting your attic insulation.

Climate zone 5 r10 13 instead of r15 19. 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. Insulation shall be blown into the spaces between the ceiling floor joists. Existing 3 4 inches of insulation.

All new construction in the usa and canada today must meet certain minimum r values depending on what climate area of the country you live in. Supply ducts in attics shall be sealed and insulated to a minimum of r 8. 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. Assessing what you ve got.

Michigan wisconsin and minnesota will have higher building code insulation requirements than let s say tennessee. Ducts or portions thereof located completely inside the building thermal envelope are exempted from the insulation requirement. First things first you need to go up into your attic inspect the condition of the insulation and calculate. R 408 31065 equivalent u factors.

Does your attic insulation measure up. The minimum wall r value shall be r 13 in all zones. How much insulation should you install. Many homes have no insulation at all because building codes didn t even require insulation prior to the mid 1970 s.

All other ducts shall be sealed and insulated to a minimum of r 6. Recommended levels of insulation. 67 f 19 4 c or higher for 3 000 or more hours. Climate zone 6 and 7 r20 or r13 5 instead of r20 or r13 10 and first value is cavity insulation second is continuous.

Insulation is generically thought of as a material that keeps things warm but insulation like foam can also help to keep a home cool. Add insulation to attic.