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.

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. Concrete block wall with perlite in cavities r 2 9. R value is a measure of insulation s ability to resist heat traveling through it. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.

A few of the walls in the planned finished portion will be against the poured cement basement walls. Depending on the density of the blocks an 8 inch thick block wall without any other type of. Currently there is insulation on the basement walls. 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.

Recommended home insulation r values. 564 to obtain copies of this reference. The house is a few years old located in the 4a region close to the 5a region border in pa. 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.

Know exactly how much you need with our project calculators. Concrete block wall with air in cavities r 2 0. Insulation level are specified by r value. The basement walls are 99 above grade ground.

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. Concrete and block walls. The higher the r value the better the thermal performance of the insulation.

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. Call pca at 847 966 6200 ext.