R Value Of Concrete Wall Above Grade

Currently there is insulation on the basement walls.

R value of concrete wall above grade.

R value is a measure of insulation s ability to resist heat traveling through it. The basement walls are 99 above grade ground. When determining how much insulation you need don t guesstimate calculate. 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.

The higher the r value the better the thermal performance of the insulation. 564 to obtain copies of this reference. 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. The higher the r value the greater the insulation performance.

Concrete block makes a cost effective and structurally sound wall but it has little thermal resistance. 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. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. Insulation level are specified by r value.

A few of the walls in the planned finished portion will be against the poured cement basement walls. 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. Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch. Depending on the density of the blocks an 8 inch thick block wall without any other type of.

Concrete and block walls. 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 block wall with air in cavities r 2 0.

Concrete block wall with perlite in cavities r 2 9. R value measures how well certain building insulation materials can resist heat. Recommended home insulation r values.