Install Instructions

IM-PR 566442 1114 (Design Manual)
72
Figure 3-1 Perimeter insulation options
Insulation Below Suspended Slab (R-Value)
Floor Covering R-Value
0.25 0.5 1 1.5 2 2.5
Suspended Slab, Back Loss in Heating
0 44% 50% 58% 64% 69% 72%
2.5 22% 25% 32% 38% 42% 48%
5 14% 16% 22% 27% 30% 34%
7.5 10% 13% 17% 21% 24% 28%
10 8% 10% 14% 17% 20% 22%
Table 3-3 Suspended slab back losses as percent of total heat transfer from panel, assuming a mean
heating water temperature of 120°F, and an air temperature above and below the suspended slab of 68°F.
Concrete Slab
Foam Board Insulation:
24" min. height, 3" min.
thickness R-15
Sill Plate
Compact Subgrade
Gravel
ViegaPEX Tubing:
Minimum ¾" height of thin-slab
over PEX Tubing
Foundation Wall
Polyethylene Film:
6 mil (min.)
R-5 Insulation:
Refer to local code for insulation requirements.
(Ensure compression rating is suitable for
application.)
4"
45°
NOTE:
For insulation requirements for Canada see Page 13 Section 1.3.3 of this manual.