R Value Of Concrete Wall Above Grade

3 for tabulated r values of walls with core insulation.

R value of concrete wall above grade.

When using core insulation the insulation should occupy all. The walls have rebar of various diameters imbedded throughout. Concrete block makes a cost effective and structurally sound wall but it has. Concrete and block walls.

Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch. R value is a measure of insulation s ability to resist heat traveling through it. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. The higher the r value the better the thermal performance of the 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. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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.

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 wall with perlite in cavities r 2 9. The insulating materials used for these systems range in r value. Recommended home insulation r values.

For example if you have a type of insulation. 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 walls i am working with vary from 6 inches thick for one wall and 10 12 and 14 inches thick for other walls. 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.

Insulation level are specified by r value. 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.