R Value Of 10 Poured Concrete Wall

As we said before the r value measures the thermal resistance of a material. 1 25 2 nominal 1 1 2 1 88 2x4 3 1 2 4 38 2x6 5 1 2 6 88. If you had a 20 x 30 6m x 9m basement with concrete or concrete block walls your heat loss could easily be over 1 million btus per day through the walls.

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Use the r value table below to help you determine the r value of your wall or ceiling assemblies.

R value of 10 poured concrete wall.

Concrete or concrete block. Eps block forms poured in place with concrete block walls 1 7 8 thick 15 2 15 7 103 7. But concrete is a conductor of thermal energy not an insulator. To obtain a wall or ceiling assembly r value you must add the r values of the individual components together.

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 insulation may be poured directly into walls or emptied into a simply wood or metal hopper which can be slid along the wall to direct the free flowing perlite into cores of cavities thus insulating all voids and air pockets. Concrete block walls u values r values.

Wood frame walls 3 plus r value of the insulation used floors above unheated spaces 2 plus r value of the insulation used. Block thickness in inches. 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. 2 x 4 wood stud wall 16 o c r 11 batts 1 2.

By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. Therefore technically it has no insulation value. I agree mostly with junio s answer. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other.

Concrete block makes a cost effective and structurally sound wall but it has. Cedar logs and lumber. However too many people confuse insulation properties with thermal mass many icf dealers d. R value of 8 20cm poured concrete 0 64 r value of 4 10cm brick 0 80 r value of 1 3cm sheetrock 0 45 r value of 1 3cm sheathing 1 31.

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