Recommended home insulation r values.
R value of concrete wall above grade.
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.
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.
Know exactly how much you need with our project calculators.
Concrete and block walls.
Insulation level are specified by r value.
The basement walls are 99 above grade ground.
R inch r thick ness insulation materials fiberglass batt 3 14 fiberglass blown attic 2 20 1 fiberglass blown wall 3 20 rock wool batt 3 14 rock wool blown attic 3 10 rock wool blown wall 3 03 cellulose blown attic 3 13 cellulose blown wall 3 70 vermiculite 2 13 air entrained concrete 3 90 urea terpolymer foam 4 48.
Concrete block makes a cost effective and structurally sound wall but it has little thermal resistance.
By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.
R value measures how well certain building insulation materials can resist heat.
Concrete block wall with air in cavities r 2 0.
The r value listed by pca for a normal weight 144 pcf 6 inch concrete wall is 1 23 and includes inside and outside air film resistances which contribute to overall thermal resistance.
The higher the r value the better the thermal performance of the insulation.
Call pca at 847 966 6200 ext.
Depending on the density of the blocks an 8 inch thick block wall without any other type of.
The r value of an uninsulated 8 inch thick basement wall built using normal weight concrete is 1 35 based on data from the 1993 american society of heating refrigeration and air conditioning engineers handbook.
Currently there is insulation on the basement walls.
The higher the r value the greater the insulation performance.
The minimum thermal resistance r value of the insulating materials installed in the wall cavity between the framing members and continuously on the walls shall be as specified in table c402 2 based on framing type and construction materials used in the wall assembly the r value of integral insulation installed in concrete masonry units cmu shall not be used in determining compliance with.
The house is a few years old located in the 4a region close to the 5a region border in pa.
Concrete block wall with perlite in cavities r 2 9.
When determining how much insulation you need don t guesstimate calculate.
A few of the walls in the planned finished portion will be against the poured cement basement walls.
