R Value Of 12 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 concrete wall.

Typical residential weight concrete 8 wall r 2 5. 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. 102 mm hollow unit concrete masonry veneer. Concrete block wall with air in cavities r 2 0.

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. Concrete block 12 inch 1 28 brick 4 inch common 0 80 brick 4 inch face 0 44. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other. The reason that it is important to make a good estimate for the current r value for uninsulated spaces is that small changes in r values result in large changes in heat loss when the total r value is low.

0 13 0 64 30. 102 152 203 254 and 305 mm backup wythes and a 4 in. R value of building materials material r inch r thick ness fiberglass inch 3 00 1 inch 4 00. 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 makes a cost effective and structurally sound wall but it has. R value tables traditional three web units. Cellulose blown wall 3 70 vermiculite 2 13 air entrained concrete 3 90. As we said before the r value measures the thermal resistance of a material.

R values u values coverage charts. The schundler company 150 whitman avenue p o. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.

Block and cavity fill. Table 2 presents r values of uninsulated concrete masonry cavity walls with 4 6 8 10 and 12 in. Box 513 metuchen new jersey 08840 0513. Concrete block wall with perlite in cavities r 2 9.