Attic Insulation R Value Michigan

Resistance to the movement in temperature through walls ceilings and floors in your home or commercial building.

Attic insulation r value michigan.

Achieving greater r values in exterior walls. R 408 31063a specific insulation requirements prescriptive. R 5 shall be added to the required slab edge r values for heated slabs. 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.

Where you live different climates require different insulation r values. Rule 1063a section r402 2 12 of the code is amended to read as follows. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Your home s age if your home is more than 10 year old you likely need more insulation.

The best attic insulation always depends on the way it s applied. There are many ways to retrofit a home with fiberglass and. You first have to ask yourself what do i want to do with my attic space. 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. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Insulation r value requirements for michigan what is r value. The higher the r value the better the thermal performance of the insulation.

There s fiberglass and cellulose which are close in r value. R value is a measure of insulation s ability to resist heat traveling through it. The table below shows what levels of insulation are cost effective for different climates and. Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc.

Thermally isolated sunroom insulation. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. The minimum wall r value shall be r 13 in all zones.

The higher the r value the better the thermal performance of the insulation. Recommended home insulation r values. 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. Table n1102 1 1 r402 1 1 insulation and fenestration table amendments ceilings.

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. The r in r value stands for resistance. Insulation level are specified by r value. New wall or walls separating a.