R Value Of Concrete Wall Above Grade

R value measures how well certain building insulation materials can resist heat.

R value of concrete wall above grade.

Know exactly how much you need with our project calculators. 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. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. Concrete block wall with air in cavities r 2 0.

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. 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. The higher the r value the greater the insulation performance.

Concrete and block walls. R value is a measure of insulation s ability to resist heat traveling through it. 564 to obtain copies of this reference. 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 basement walls are 99 above grade ground. The higher the r value the better the thermal performance of the insulation. 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. 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.

Recommended home insulation r values. The house is a few years old located in the 4a region close to the 5a region border in pa. 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.

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. Concrete block wall with perlite in cavities r 2 9.