R Value Of Concrete Wall Above Grade

A few of the walls in the planned finished portion will be against the poured cement basement walls.

R value of concrete wall above grade.

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. Concrete block wall with perlite in cavities r 2 9. 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 house is a few years old located in the 4a region close to the 5a region border in pa.

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. Recommended home insulation r values. Insulation level are specified by r value. Know exactly how much you need with our project calculators.

Concrete block makes a cost effective and structurally sound wall but it has little thermal resistance. Concrete and block walls. The basement walls are 99 above grade ground. 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.

When determining how much insulation you need don t guesstimate calculate. The higher the r value the better the thermal performance of the insulation. 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. 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 greater the insulation performance. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. Currently there is insulation on the basement walls. Depending on the density of the blocks an 8 inch thick block wall without any other type of.

Call pca at 847 966 6200 ext. Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch. Concrete block wall with air in cavities r 2 0.