R Value For Attic Insulation Michigan

R 5 shall be added to the required slab edge r values for heated slabs.

R value for attic insulation michigan.

Recommended insulation levels for retrofitting existing wood framed buildings. However there is an exception. Add insulation to attic. Energy star states that an r 60 is equal to the best performing attic insulation.

The higher the r value the better the thermal performance of the insulation. For new residential construction projects compliance with the muec can be demonstrated by any of the following. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Achieving greater r values in exterior walls. New wall or walls separating a sunroom from conditioned space shall meet the building thermal envelope requirements. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. 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 long as you bring your r value up to r 49 you can go online and apply. Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc. Alternately the insulation installers shall provide a certification listing the type manufacturer and r value of insulation installed in each element of the building thermal envelope. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.

Existing 3 4 inches of insulation. The minimum wall r value shall be r 13 in all zones. The 2015 irc requires r 49 insulation for ceilings with attic spaces. Dte energy and consumers energy suggest an r 49 or above to be energy efficient.

There are many ways to retrofit a home with fiberglass and. As a result of being a dte or consumers customer you qualify for standard rebates. Injection foam insulation s higher r value with an r value of 4 0 to 5 1 per inch depending on the manufacturer pre expanded injection foam provides a higher r value than fiberglass or cellulose and it seals the building from air leakage at the same time. Complying with the revisions to the michigan uniform energy code muec is easier than you may think.

R 408 31065 equivalent u factors. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. An r value identification mark shall be applied by the manufacturer to each piece of building thermal envelope insulation 12 inches 305 mm or greater in width.