Attic Insulation R Value Michigan

Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

Attic insulation r value michigan.

R value is a measure of insulation s ability to resist heat traveling through it. R 5 shall be added to the required slab edge r values for heated slabs. The table below shows what levels of insulation are cost effective for different climates and. Climate zone 5 r38 instead of r49 wood framed walls.

Insulation r value requirements for michigan what is r value. Insulation level are specified by r value. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Recommended home insulation r values.

The higher the r value the better the thermal performance of the 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. Your home s age if your home is more than 10 year old you likely need more insulation. Rule 1063a section r402 2 12 of the code is amended to read as follows.

Where you live different climates require different insulation r values. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. 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. The minimum wall r value shall be r 13 in all zones.

The best attic insulation always depends on the way it s applied. R 408 31063a specific insulation requirements prescriptive. There s fiberglass and cellulose which are close in r value. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.

You first have to ask yourself what do i want to do with my attic space. The higher the r value the better the thermal performance of the insulation. The r in r value stands for resistance. A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Table n1102 1 1 r402 1 1 insulation and fenestration table amendments ceilings. Achieving greater r values in exterior walls. Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. The attic insulation and air seal will pay for itself many times over. New wall or walls separating a. There are many ways to retrofit a home with fiberglass and.