R Value Of 8 Poured Concrete Wall

Typical residential weight concrete 8 wall r 2 5.

R value of 8 poured concrete wall. Eps block forms poured in place with concrete block walls 1 7 8 thick 15 2 15 7 103 7. 0 13 0 64 30. R value of single pane glass 0 91. As we said before the r value measures the thermal resistance of a material.

Use the r value table below to help you determine the r value of your wall or ceiling assemblies. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other. 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. 1 25 2 nominal 1 1 2 1 88 2x4 3 1 2 4 38 2x6 5 1 2 6 88.

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. The last step is to pour concrete into the forms. Wood frame walls 3 plus r value of the insulation used floors above unheated spaces 2 plus r value of the insulation used. Cedar logs and lumber.

Concrete sand gravel aggregate. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. Advantages of poured concrete foundation. 2 x 4 wood stud wall 16 o c r 11 batts 1 2.

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. Concrete block makes a cost effective and structurally sound wall but it has. Poured concrete foundations provide a high level of strength and durability and can last for decades. To obtain a wall or ceiling assembly r value you must add the r values of the individual components together.