R Value Of 12 Inch Concrete Wall

Block and cavity fill.

R value of 12 inch concrete wall.

R values u values coverage charts. Typical residential weight concrete 8 wall r 2 5. 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. 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. As we said before the r value measures the thermal resistance of a material. 8 inch problock 12 inch problock. 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.

By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. 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. 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. 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.

The key to maximizing whole wall r values of concrete masonry walls is minimizing thermal bridges within the concrete masonry units. Cavity wall r values are listed in tek 6 1c r values of multi wythe concrete masonry walls ref. 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.

Concrete sand gravel aggregate. Box 513 metuchen new jersey 08840 0513.