Basement Insulation R Value

Basement walls require a minimum of either r 10 continuous or r 13 batted insulation.

Basement insulation r value.

The basement walls need to be insulated to a minimum value of r 10 for continuous insulation such as foam plastic insulation or r 13 for framing cavity insulation based on the component requirements of table n1102 1 insulation and fenestration requirements by component. Generally zones 1 and 2 cover the southern states which suggest no necessary values to r 10 for basement walls. The higher the r value the better the thermal performance of the insulation. However you can stop that by properly insulating it against all of the weather fluctuation outside.

Zones 3 and 4 include the midwest and northern regions requiring r 10 to r 19 values. With the correct insulation your basement can stay warmer in the winter by keeping the cold from penetrating your basement walls and cooler in the summer by adding a layer. R value is a measure of insulation s ability to resist heat traveling through it. Insulating the basement or crawlspace will reduce this heat loss saving space heating energy and improving comfort by keeping the floors warmer.

It provides r values that range from 3 6 to 4 2 per inch. Choose this option for areas that need a good amount of strength and water resistance. Also called styrofoam insulation this is the least expensive material. An unconditioned basement is defined as an unheated basement with no significant heat producing appliances or devices.

The higher the r value the greater the insulation performance. When insulating basement walls the required r value shall b e applie d from th e top of the basement w all to a depth of ten feet 3048 mm below grade or to the top of the basement floor whichever is less. Some products have reinforced facing to make them sturdier. The table below shows what levels of insulation are cost effective for different climates and.

Recommended home insulation r values. Extremely northern regions and high elevations are zone 5 requiring r 15 to r 19 values. Know exactly how much you need with our project calculators. It provides about r 5 per inch.

The model energy code recommends r 11 insulating values for basement walls in most of the country and r 15 for the northernmost states. R value measures how well certain building insulation materials can resist heat. When determining how much insulation you need don t guesstimate calculate. Insulation level are specified by r value.