R Value For Attic Insulation Michigan

Dte energy and consumers energy suggest an r 49 or above to be energy efficient.

R value for attic insulation michigan.

The minimum wall r value shall be r 13 in all zones. New wall or walls separating a sunroom from conditioned space shall meet the building thermal envelope requirements. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc.

The higher the r value the better the thermal performance of the insulation. 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. R 408 31065 equivalent u factors. Energy star states that an r 60 is equal to the best performing attic insulation.

As a result of being a dte or consumers customer you qualify for standard rebates. Existing 3 4 inches of insulation. R 5 shall be added to the required slab edge r values for heated slabs. Where you live different climates require different insulation r values.

Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. There are many ways to retrofit a home with fiberglass and. Complying with the revisions to the michigan uniform energy code muec is easier than you may think.

Your home s age if your home is more than 10 year old you likely need more insulation. 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. The 2015 irc requires r 49 insulation for ceilings with attic spaces. As long as you bring your r value up to r 49 you can go online and apply.

Achieving greater r values in exterior walls. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. 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. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.

Meeting the minimum required thermal performance criteria for both u factor and r value. For new residential construction projects compliance with the muec can be demonstrated by any of the following. Recommended insulation levels for retrofitting existing wood framed buildings.