R Value Of Concrete Wall Above Grade

Concrete block makes a cost effective and structurally sound wall but it has.

R value of concrete wall above grade.

Concrete block wall with air in cavities r 2 0. Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch. Insulation level are specified by r value. The insulating materials used for these systems range in r value.

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. 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. For example if you have a type of insulation. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.

When using core insulation the insulation should occupy all. Concrete block wall with perlite in cavities r 2 9. Concrete and block walls. 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.

Insulating value first the r value of buildblock s polystyrene alone is r 20 compared to wood frame s r 9 to r 15 and concrete block of r 2. By placing 2 inches of extruded polystyrene within a tilt up panel as a sandwich panel the material r value of that wall is increased to 11 49 with air film coefficients of 0 85. The walls have rebar of various diameters imbedded throughout. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other.

3 for tabulated r values of walls with core insulation. As for the furring used for interior insulation the thermal resistance of the concrete masonry webs and any grouted cores should be accounted for when determining the thermal performance of the wall see tek 6 2c ref. The walls i am working with vary from 6 inches thick for one wall and 10 12 and 14 inches thick for other walls. Meaning that icf walls are expected to cut the conduction losses through foundation and above grade walls by nearly half.

The higher the r value the better the thermal performance of the insulation. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.