Attic Insulation R Value Michigan

R 408 31063a specific insulation requirements prescriptive.

Attic insulation r value michigan.

New wall or walls separating a. Thermally isolated sunroom insulation. Climate zone 5 r38 instead of r49 wood framed walls. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly. 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.

Insulation level are specified by r value. You first have to ask yourself what do i want to do with my attic space. Insulation r value requirements for michigan what is r value. 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.

Where you live different climates require different insulation r values. There are many ways to retrofit a home with fiberglass and. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8. Achieving greater r values in exterior walls.

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. The best attic insulation always depends on the way it s applied. 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.

The attic insulation and air seal will pay for itself many times over. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. Table n1102 1 1 r402 1 1 insulation and fenestration table amendments ceilings. The higher the r value the better the thermal performance of the insulation.

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. 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. Recommended home insulation r values.

The r in r value stands for resistance. The table below shows what levels of insulation are cost effective for different climates and. R value is a measure of insulation s ability to resist heat traveling through it. There s fiberglass and cellulose which are close in r value.