Attic Insulation R Value Wisconsin

For most homes in the southeastern wisconsin area r49 rated insulation is enough to keep homes properly insulated as it s 16 5 thick.

Attic insulation r value wisconsin.

The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value. What r value does your home need. In layers such as framing cavity insulation and insulating sheath ing shall be summed to compute the component r value.

Although a higher r value generally means a more effective insulator the highest. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Put simply r value measures how well something resists heat. Your home s age if your home is more than 10 year old you likely need more insulation.

A r 38 will satisfy the ceiling r value requirement for a dwelling where the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves. The higher the r value the better the thermal performance of the insulation. There are many ways to retrofit a home with fiberglass and. Blown in cellulose is the most common product we install for insulating large attic spaces.

Insulation levels are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. Department of energy states that the best attic insulation has a rating between r49 and r60. C computed r values may not include values for air films or for building materials other than insulation materials.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. B the manufacturer s settled r value shall be used for blown insulation. Recommended home insulation r values. Sps 322 32 specific insulation requirements.

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. Code requirements in wisconsin dictate a minimum r value of 30 where there are no attic space r 38 for those with attics but they suggest r value of 49 where it can be accomplished. The table below shows what levels of insulation are cost effective for different climates and. If your exterior walls are constructed from 2 by 4 inch studs the most insulation that can go into the wall while retaining its r value is r 13 or r 15 as these are both made to fit a cavity 3 1 2 inches deep.

1 ceilings with attic spaces. In the midwest region of the united states the u s. Where you live different climates require different insulation r values. R value is a measure of insulation s ability to resist heat flow.