WarmlyYours Snow Melting & Slab Heating - Manual (Page 9)

8
5.5 INSTALLATION UNDER PAVERS (STONE OR BRICK)
1. Ensure that there is a solid base of 4” to 8” (102mm to 203mm) of crushed rock
aggregate base and that it is tamped down and ready to receive the mortar pour.
2. It is extremely important that the paver installer does NOT use any heavy
equipment, machinery, or vehicles over the exposed Heating Cable. During the
paver installation process, it is recommended that care be taken to avoid stepping
on the hot-cold factory splice portion of cable (green meets black). It is the
responsibility of the electrician to use a 500 VDC megohmmeter and a multi-meter
to continuously check on the Heating Cables that are currently being worked on
top of, to ensure they have not been damaged, and will be ready for action once
the mortar pour has cured.
3. For installations in stairs and ramps that will include hand rails, it is strongly
recommended that the paver installer pre-sleeve for the posts to avoid any and all
drilling of the mortar. The Heating Cable must be routed around these sleeves or
posts to avoid any direct contact with them. It is the responsibility of the electrician
and the paver installer to coordinate their efforts so they avoid saw-cutting or
drilling thru Heating Cables that are no longer visible beneath the mortar.
4. The paver installer or electrician should place wire mesh (like would be used in
concrete) down on top of the crushed rock aggregate. The mesh should be staked
down firmly to the crushed rock so it remains flat. Next, the Heating Cable or Mats
should be attached to the mesh using wire ties to maintain proper depth and
spacing, 3” (76mm) for free-form type Cable. Reference the WarmlyYours custom
installation plan provided with quotation so that this process goes smoothly.
5. At this time, the electrician must route the cold lead(s) thru rigid metal conduit(s),
to get back to an accessible weatherproof junction box(es). Care must be taken
by the electrician so that none of the heated section (green) enters any conduit.
For this type of application, we recommend using an aerial mounted snow sensor
to avoid having to cut around a circular slab mounted sensor (this could cause
a trip hazard or premature paver crumble). Once the conduit(s) is in place, the
product is ready to receive the mortar pour.
6. Care must be taken by the paver installer so the mortar covers the Heating Cables
/ Mats and they will not make direct contact with the pavers. We recommend that
at least 1.5” (38mm) thick mortar is poured over the Heating Cables / Mats, but no
more than 2”(51mm).
7. The paver installer(s) must take care not to walk on the hot-cold factory splice
and to avoid damaging the Heating Cables with shovels or rakes. Mats should
be placed mesh facing up, keeping the wire-side-down, to help protect them from
the shovels.
8. The electrician needs to complete final testing of all the Heating Cables / Mats
with a multi-meter and a megohmmeter to verify and record that each Heating
Cable has survived the pour of mortar, and is ready for action once the mortar is
cured. These values must be recorded on the warranty card on page 22.
WARNING
Brick and Stone Pavers must NOT be any thicker than 2.5” (63.5mm).