Attic Insulation R Value Michigan

Rule 1063a section r402 2 12 of the code is amended to read as follows.

Attic insulation r value michigan.

There s fiberglass and cellulose which are close in r value. You first have to ask yourself what do i want to do with my attic space. Achieving greater r values in exterior walls. 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.

R 408 31063a specific insulation requirements prescriptive. The higher the r value the better the thermal performance of the insulation. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. New wall or walls separating a.

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. Your home s age if your home is more than 10 year old you likely need more insulation. There are many ways to retrofit a home with fiberglass and. The attic insulation and air seal will pay for itself many times over.

Thermally isolated sunroom insulation. R 5 shall be added to the required slab edge r values for heated slabs. Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building. R value is a measure of insulation s ability to resist heat traveling through it.

The higher the r value the better the thermal performance of the insulation. 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. Where you live different climates require different insulation r values.

The r in r value stands for resistance. Insulation level are specified by r value. The best attic insulation always depends on the way it s applied. Climate zone 5 r38 instead of r49 wood framed walls.

Recommended home insulation r values. Insulation r value requirements for michigan what is r value. 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.

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. A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly. The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.