R Value Of 10 Poured Concrete Wall
1 25 2 nominal 1 1 2 1 88 2x4 3 1 2 4 38 2x6 5 1 2 6 88.
R value of 10 poured concrete wall. 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. Concrete block walls u values r values. 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.
Cedar logs and lumber. Block thickness in inches. 2 x 4 wood stud wall 16 o c r 11 batts 1 2. However too many people confuse insulation properties with thermal mass many icf dealers d.
Eps block forms poured in place with concrete block walls 1 7 8 thick 15 2 15 7 103 7. As we said before the r value measures the thermal resistance of a material. Concrete or concrete block. 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.
I agree mostly with junio s answer. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. 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. 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.
But concrete is a conductor of thermal energy not an insulator. Use the r value table below to help you determine the r value of your wall or ceiling assemblies. 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. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other.