R Value Of Concrete Wall Above Grade

The higher the r value the better the thermal performance of the insulation.

R value of concrete wall above grade.

Recommended home insulation r values. Insulation level are specified by r value. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. 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.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. R value is a measure of insulation s ability to resist heat traveling through it. For example if you have a type of insulation. Concrete block makes a cost effective and structurally sound wall but it has.

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 air in cavities r 2 0. The walls i am working with vary from 6 inches thick for one wall and 10 12 and 14 inches thick for other 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.

Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch. 3 for tabulated r values of walls with core insulation. I am trying to determine r values for poured in place concrete walls both above grade and below grade at varying thicknesses. Meaning that icf walls are expected to cut the conduction losses through foundation and above grade walls by nearly half.

Concrete and block walls. The walls have rebar of various diameters imbedded throughout. 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 insulating materials used for these systems range in r value.

Concrete block wall with perlite in cavities r 2 9. A wall s thermal resistance or its r value is its ability to slow the transfer of heat from one side to the other.