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4.6 Post-Installation Tips - Insulation
B
Insulation Blocking
Fr om Decoiler
To Manifold
IM-HC 530590 0621 Climate Trak (EN)
Continue transferring the tubing through the loops, finishing one bay at a
time.
Insulation should always be used in a staple-up radiant installation. Ideally
there should a 1" to 2" air gap in between the insulation and the Traks/
Plates.
However, the air gap should only be left if that space is considered a
dead air space (absolutely no air current through it, whether it be from an
outside wall, from below, or through holes in the subfloor).
To create a dead air space, begin by insulating the outside ends of the
joist bays with a separate piece of insulation (insulation blocking) between
the top of the foundation and the bottom of the subfloor to keep cold air
from entering through sills and outside walls.
Any air current through this space will decrease the performance of the
system and the insulation. By insulating outside walls, sealing any large
gaps in the subfloor, and ensuring that the insulation is tight against
the joist, this will create a situation where the air gap is beneficial to the
performance of the system.
If a dead air space is unable to be achieved, then the insulation should be
pushed up lightly against the Traks/Plates.
When using expanding foam insulation on and around
the PEX tubing, please contact the manufacturer of the
foam or Viega for PEX compatibility issues. Some foams
my cause excessive heat if installed improperly. This
excessive heat may cause damage to the PEX.
Climate Trak / Heat Transfer Plate System Installation
17 of 40
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