Department of energy states that the best attic insulation has a rating between r49 and r60.
Recommended r value for attic wisconsin.
Where you live different climates require different insulation r values.
The higher the r value the better the thermal performance of the insulation.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
When determining how much insulation you need don t guesstimate calculate.
Here i recommend a 3 5 10 20 60 rule.
R value measures how well certain building insulation materials can resist heat.
While some ceilings in the southwestern part of the united states require a minimum of r 19 insulation most attics or ceiling areas require a minimum of r 38 in the ceiling.
The higher the r value the better the thermal performance of the insulation.
Insulation level are specified by r value.
R value is a measure of insulation s ability to resist heat flow.
The higher the r value the greater the insulation performance.
Add the right kind of insulation.
That s why different regions of the united states have different recommended insulation levels.
For most homes in the southeastern wisconsin area r49 rated insulation is enough to keep homes properly insulated as it s 16 5 thick.
R value is a measure of insulation s ability to resist heat traveling through it.
Recommended r values in this region range from r5 up to r60 depending on the area being insulated.
Sps 322 32 8 a a joist spaces that extend beyond exterior walls shall be insulated with an r value of 30 or higher with insulation that completely fills the cavity including over the top of the exterior wall supporting the joists.
Know exactly how much you need with our project calculators.
R 3 windows r 5 under slabs and for any below grade foundation walls r 10 for above grade foundation walls and slab perimeter full foundations are rare in these climates r 20 for above ground walls and r 60 for attics.
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.
What areas of my home need insulation.
Here in the sheboygan county area and throughout central and southern wisconsin we are in zone 6.
What r value does your home need.
Insulation levels are specified by r value.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
