R Value Of Concrete Wall Above Grade

Meaning that icf walls are expected to cut the conduction losses through foundation and above grade walls by nearly half.

R value of concrete wall above grade.

A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other. The higher the r value the better the thermal performance of the insulation. 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. Recommended home insulation r values.

Concrete and block walls. Concrete block wall with air in cavities r 2 0. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Concrete block makes a cost effective and structurally sound wall but it has.

By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. R value is a measure of insulation s ability to resist heat traveling through it. The walls have rebar of various diameters imbedded throughout. I am trying to determine r values for poured in place concrete walls both above grade and below grade at varying thicknesses.

The insulating materials used for these systems range in r value. 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. 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. 3 for tabulated r values of walls with core insulation.

The walls i am working with vary from 6 inches thick for one wall and 10 12 and 14 inches thick for other walls. 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 example if you have a type of insulation. When using core insulation the insulation should occupy all.

Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch. 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.