R Value Of 12 Inch Concrete Wall

8 thick concrete slab or foundation wall has an r value of about 1 04 30 while lightweight aggregate filled 8 thick concrete has an r value of about 2 18 30.

R value of 12 inch concrete wall.

The schundler company 150 whitman avenue p o. Concrete block 8 inch 1 11 concrete block 12 inch 1 28 brick 4 inch common 0 80 brick 4 inch face 0 44 poured concrete 0 08 soft wood lumber 1 25 2 inch nominal 1 inch 1 88 2 x 4 3 inch 4 38 2 x 6 5 inch 6 88 cedar logs and lumber 1 33 sheathing materials plywood 1 25 inch 0 31 inch 0 47 inch 0 63. The key to maximizing whole wall r values of concrete masonry walls is minimizing thermal bridges within the concrete masonry units. Concrete sand gravel aggregate.

8 inch problock 12 inch problock. Depending on the density of the blocks an 8 inch thick block wall without any other type of insulation has a thermal resistance value between r 1 9 and r 2 5. R values u values coverage charts. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. The r values u factors listed in this tek were determined by calculation using the code recognized series parallel also called isothermal planes calculation method refs. Box 513 metuchen new jersey 08840 0513. Cavity wall r values are listed in tek 6 1c r values of multi wythe concrete masonry walls ref.

Typical residential weight concrete 8 wall r 2 5. Block and cavity fill. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. 0 13 0 64 30.

Block type density fill r in 32 x 48 48 x 48 48 x 72 72 x 72 problock 85 pcf 4 6 0 224 0 199 0 183 0 166. 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 concrete block wall with perlite in cavities r 2 9.