Michigan Attic Insulation R Value

You first have to ask yourself what do i want to do with my attic space.

Michigan attic insulation r value.

Achieving greater r values in exterior walls. Climate zone 5 r38 instead of r49 wood framed walls. The table below shows what levels of insulation are cost effective for different climates and. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.

The 2015 irc requires r 49 insulation for ceilings with attic spaces. You can achieve better thermal performance in your attic by adding an additional layer of insulation. 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 or insulated siding so 13 5 means r 13 cavity insulation plus r. Insulation r value requirements for michigan what is r value.

The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. Rule 1063a section r402 2 12 of the code is amended to read as follows. There s fiberglass and cellulose which are close in r value. New wall or walls separating a.

Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. R value is a measure of insulation s ability to resist heat traveling through it. The r in r value stands for resistance. Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building.

The minimum wall r value shall be r 13 in all zones. Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc. R 5 shall be added to the required slab edge r values for heated slabs. Table n1102 1 1 r402 1 1 insulation and fenestration table amendments ceilings.

Thermally isolated sunroom insulation. There are many ways to retrofit a home with fiberglass and. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.

Recommended home insulation r values. A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly. Insulation level are specified by r value. The attic insulation and air seal will pay for itself many times over.

The higher the r value the better the thermal performance of the insulation. Your home s age if your home is more than 10 year old you likely need more 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. Where you live different climates require different insulation r values.

The best attic insulation always depends on the way it s applied. However there is an exception.