What r value does your home need.
Recommended r value for attic wisconsin.
Here in the sheboygan county area and throughout central and southern wisconsin we are in zone 6.
See the department of energy s doe ranges for recommended levels of insulation below.
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.
The amount of insulation recommended for your home will vary depending on a number of factors.
That s why different regions of the united states have different recommended insulation levels.
When determining how much insulation you need don t guesstimate calculate.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
Department of energy states that the best attic insulation has a rating between r49 and r60.
The higher the r value the better the thermal performance of the insulation.
Add the right kind of insulation.
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.
Here i recommend a 3 5 10 20 60 rule.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
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.
For most homes in the southeastern wisconsin area r49 rated insulation is enough to keep homes properly insulated as it s 16 5 thick.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
What areas of my home need insulation.
The higher the r value the greater the insulation performance.
Know exactly how much you need with our project calculators.
In the midwest region of the united states the u s.
R value measures how well certain building insulation materials can resist heat.
Insulation levels are specified by r value.
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.
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.
