R Value Of 10 In Thick Concrete Wall

This is a huge difference and essentially comes down to astm c518 being a theoretical maximum based on a steady state thermal test of only a portion of the door panel.

R value of 10 in thick concrete wall.

Depending on the density of the blocks an 8 inch thick block wall without any other type of insulation has a thermal resistance value between r 1 9 and r 2 5. Typical insulation r values panel panel r value options thickness fabrication standard premium 8 3 x 2 x 3 r 10 up to r 13 10 3 x 4 x 3 r 18 up to r 22 12 3 5 x 5 x 3 5 r 22 up to r 34 panel fabrication is inches of exterior wythe x inches of insulation x inches of interior wythe r value rating for regular sandwich panels. R value tables traditional three web units. Choose from a number of variables such as concrete thickness insulation climate zone building class and the calculator will provide the total r value of the wall or flooring system.

Table 2 presents r values of uninsulated concrete masonry cavity walls with 4 6 8 10 and 12 in. 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. Total r values are based on the sum of all components of the building system including indoor and outdoor air films building materials used in the system and air spaces. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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. Based on astm c518 calculation method the door has an r value of up to 11 but using astm c1363 tested operable the same door only have an r value of up to 3 5. By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.

102 152 203 254 and 305 mm backup wythes and a 4 in.