R Value For Attic Insulation Michigan

As long as you bring your r value up to r 49 you can go online and apply.

R value for attic insulation michigan.

New wall or walls separating a sunroom from conditioned space shall meet the building thermal envelope requirements. Meeting the minimum required thermal performance criteria for both u factor and r value. Achieving greater r values in exterior walls. Recommended insulation levels for retrofitting existing wood framed buildings.

Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. The minimum wall r value shall be r 13 in all zones. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. 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.

Energy star states that an r 60 is equal to the best performing attic insulation. Existing 3 4 inches of insulation. R 5 shall be added to the required slab edge r values for heated slabs. R 408 31065 equivalent u factors.

Where you live different climates require different insulation r values. 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. The 2015 irc requires r 49 insulation for ceilings with attic spaces.

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. Add insulation to attic. 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. Your home s age if your home is more than 10 year old you likely need more insulation.

However there is an exception. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. For new residential construction projects compliance with the muec can be demonstrated by any of the following. Complying with the revisions to the michigan uniform energy code muec is easier than you may think.

As a result of being a dte or consumers customer you qualify for standard rebates. You can achieve better thermal performance in your attic by adding an additional layer of 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.