R Value Of Concrete Wall Above Grade

3 for tabulated r values of walls with core insulation.

R value of concrete wall above grade.

By doubling the thickness of the wall to 16 inches the r value only increases by 0 50. 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. The higher the r value the better the thermal performance of the insulation. Concrete block makes a cost effective and structurally sound wall but it has.

Concrete block wall with perlite in cavities r 2 9. Recommended home insulation r values. The insulating materials used for these systems range in r value. R value is a measure of insulation s ability to resist heat traveling through it.

I am trying to determine r values for poured in place concrete walls both above grade and below grade at varying thicknesses. When using core insulation the insulation should occupy all. 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. For example if you have a type of insulation.

Concrete and block walls. The walls i am working with vary from 6 inches thick for one wall and 10 12 and 14 inches thick for other walls. 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 have rebar of various diameters imbedded throughout.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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. 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. Above grade concrete wall including inside and outside air films r 1 2 for 6 inch r1 4 for 8 inch.

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