Install Instructions

IM-PR 566442 1114 (Design Manual)
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Step 5. Start by installing tubing on the perimeter of the room. If there are any exterior walls, start in those
areas rst. Work the loops inward and back to the manifold.
Step 4. ½" ViegaPEX Barrier tubing can be walked into the Snap Panel. Tubing can be installed in any
direction in multiples of 3".
NOTE: If concrete is not to be poured immediately upon installation of Snap Panel, care should be taken
to protect the installation from lifting due to adverse weather conditions. This can be done by adding
temporary weighting to the perimeter of the oor area. Caution should be taken as to not damage the
tubing or Snap Panel.
Step 3. Considerations for thin-slabs
Some installation methods call for the thin-slab to
be constructed before any exterior walls or interior
partitions are erected. To prevent bonding, all
edges of the base plates that will be in contact with
the concrete slab should be coated with a suitable
release agent compatible with PEX tubing.
Concrete thin-slabs
The following may be added to the mixture for
flowability and reduced shrinkage to minimize
cracking: super plasticizer, water-reducing agent
and fiberglass reinforcing.
Gypsum thin-slabs
Gypsum thin-slabs are usually installed after the
walls have been closed in with drywall or other
finish materials. The highly flowable gypsum
mix fills in any gaps between the drywall and
the subflooring, reducing air leakage and sound
transmission under walls.
Step 4. Pressurizing the tubing
Follow the instructions in Section 4.2.1 for pressure
testing the tubing. All tubing must be pressure
tested prior to and during pour.
Step 5. Warming up the slab
Follow the instructions in Section 4.2.4 for warming
up the slab.
Step 6. Testing the concrete for excessive moisture
Follow the instructions in Section 4.2.4 for ensuring
that the slab is sufficiently dry prior to applying
finish flooring.