Install Instructions

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IM-PR 566442 1114 (Design Manual)
Figure 5-15c Stairs -- plain view
Figure 5-15d Section through asphalt slope
Serpentine Pattern Return Reverse Pattern
R-5 Insulation:
Refer to local code for insulation requirements. (Ensure
compression rating is suitable for application.)
ViegaPEX Barrier Tubing
Gravel
Plastic Clip for Foam Board:
Fasten tubing every 2 feet and 3 times at
each U-turn to hold down any return or other
shapes created.
Asphalt
Sand or Stone Dust:
Minimum 1½" height over
ViegaPEX Barrier tubing