Attic Insulation R Value Michigan

Achieving greater r values in exterior walls.

Attic insulation r value michigan.

The minimum ceiling insulation r values shall be r 24 in zones 5 to 7. Where you live different climates require different insulation r values. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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. Thermally isolated sunroom insulation. There are many ways to retrofit a home with fiberglass and. 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.

Insulation r value requirements for michigan what is r value. R 408 31063a specific insulation requirements prescriptive. A common differentiating criteria between different types of insulation is the amount of r value they provide when correctly. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.

Climate zone 5 r38 instead of r49 wood framed walls. Recommended home insulation r values. R value is a measure of insulation s ability to resist heat traveling through it. 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. The r in r value stands for resistance. There s fiberglass and cellulose which are close in r value. 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. 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. The best attic insulation always depends on the way it s applied.

Table n1102 1 1 r402 1 1 insulation and fenestration table amendments ceilings. 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. New wall or walls separating a.

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