Cinder Block Insulation Value

Many brick homes are actually wood framed homes with brick sheathing and have insulation values comparable to other wood framed buildings.

Cinder block insulation value.

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. Following the chart shown here you can build a concrete masonry wall with an r value equal to the r value of an insulated 6 inch wood frame wall. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Walls are much greater than conventional 3 web concrete block walls.

Concrete masonry wall assemblies whole wall r values for. 11 27 2006 07 51 am 9. In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1.

Depending on the density of the blocks an 8 inch thick block wall without any other type of insulation has a thermal resistance value between r 1 9 and r 2 5. Notes to the table above. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Conventional 8 inch concrete block walls have an r value of 0 08 per square inch or about 2 5 for the whole block.

The factor that affects r value is heat transference and the cinder block while light was also dense edit because it was wet poured. The insulation may be rigid board extruded or expanded polystyrene or polyisocyanurate closed cell spray polyurethane foam cellular glass fibrous batt or fibrous blown in insulation note however that fibrous insulation is susceptible to moisture. Check with your local material suppliers for exact r values and prices of materials. Notes on the r value k values of different forms of asbestos.