As most heat is lost through the upper part of the foundation walls basement floor slabs are seldom insulated.
Recommended r value for basement floor.
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.
The list below gives recommended levels of insulation for the main areas of the home.
Basement floors r 10 rsi 1 8 basement walls r 12 rsi 2 1 above grade walls r 20 rsi 3 5.
Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.
Basement insulation recommended r values by climate.
Generally zones 1 and 2 cover the southern states which suggest no necessary values to r 10 for basement walls.
Recommended home insulation r values.
The airguard 5 in 1 floor underlayment is an ideal option if you re shopping for floor underlayment for laminate.
Zones 3 and 4 include the midwest and northern regions requiring r 10 to r 19 values.
For radiant floor heating you want the total r value to be as low as possible lower than 4 0.
Make sure that any water pipes are kept on the warm side of the insulation to prevent freezing in winter.
R values of different flooring materials.
R value is a measure of insulation s ability to resist heat traveling through it.
Insulation level are specified by r value.
This two inch thick piece of wood and the siding covering it are all that separates the interior of the basement from the outdoors.
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.
The department of energy provides a service to determine the exact r value required based on zip code and type of heating fuel.
R values of different flooring materials.
These numbers will vary from material to material.
If veiwing this page on a phone it s best to turn the phone to view in landscape mode r values of flooring materials.
Minimum recommended insulation levels.
Values are shown in both imperial r and metric rsi units.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
To keep moisture and mold away this underlayment is treated with microban and includes airguard technology to promote airflow with embedded polyshims that prevent compression and allow moisture vapor to escape.