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.

Your home s age if your home is more than 10 year old you likely need more insulation. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. Recommended insulation levels for retrofitting existing wood framed buildings. As a result of being a dte or consumers customer you qualify for standard rebates.

Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8. Existing 3 4 inches of insulation. Complying with the revisions to the michigan uniform energy code muec is easier than you may think. For new residential construction projects compliance with the muec can be demonstrated by any of the following.

There are many ways to retrofit a home with fiberglass and. Where you live different climates require different insulation r values. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Energy star states that an r 60 is equal to the best performing attic insulation.

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. 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. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. Achieving greater r values in exterior walls.

The 2015 irc requires r 49 insulation for ceilings with attic spaces. The higher the r value the better the thermal performance of the insulation. Dte energy and consumers energy suggest an r 49 or above to be energy efficient. R 408 31065 equivalent u factors.

R 5 shall be added to the required slab edge r values for heated slabs. Meeting the minimum required thermal performance criteria for both u factor and r value. 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. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

However there is an exception. Add insulation to attic. 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.