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Escape 1800-I Insert Installation and Operation Manual
36
Example:
K value = 0.75
Thickness = 1
R value = Thickness/K = 1/0.75 = 1.33
Thermal Characteristics of Common Floor Protection Materials*
MATERIAL
CONDUCTIVITY (k)
PER INCH
RESISTANCE (R) PER INCH
THICKNESS
Micore
®
160
0.39
2.54
Micore
®
300
0.49
2.06
Durock
®
1.92
0.52
Hardibacker
®
1.95
0.51
Hardibacker
®
500
2.3
0.44
Wonderboard
®
3.23
0.31
Cement mortar
5.00
0.2
Common brick
5.00
0.2
Face brick
9.00
0.11
Marble
14.3 – 20.00
0.07 – 0.05
Ceramic tile
12.5
0.008
Concrete
1.050
0.950
Mineral wool insulation
0.320
3.120
Limestone
6.5
0.153
Ceramic board (Fibremax)
0.450
2.2
Horizontal still air** (1/8")
0.135
0,920**
* Information as reported by manufacturers and other resources
** For a 1/8" thickness. You cannot «stack» horizontal still air to accumulate R-values; you must separate each
layer of horizontal still air with another non-combustible material.
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