SMG-U350 | Support | WarmlyYours

Common Support Questions

Is there a specific way to install the grid?

Yes, it is important to ensure the grid is stretched taut in the same direction as the snow melting cable.

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Could this be installed on top of existing concrete?

Yes. After the snow melting cable is installed, ensure that a minimum of 1.5" (Max 3") of non-combustible medium (concrete, mortar, stone) is placed on top.

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Could this be used to install onto an outdoor staircase prior to installing tile or stone?

Yes, your contractor would need to remove the existing tiles (if present) from the staircase and flatten the surface prior to installing the grid.

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How do I affix the grid to the concrete surface?

The grid could be attached with concrete screws and washers.

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How far apart should the screws be installed?

It is recommended to install a screw every 1 sq ft to ensure the grid does not shift or distort when the heating cable is installed.

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Is there a specific method to install the fixing screws?

It is easiest to start on one end of the grid and pull the grid tight as you go working the way across.

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Do I start installing the grid at the top or bottom of the staircase?

Start at the top and work your way down.

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How do I eliminate a lift or distortion from the grid during the installation process?

Cut a slit in the area of the lift or distortion to flatten it out.

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Publications and Manuals

Specifications

Performance

Compatible Surfaces	Can be embedded on top of existing concrete surfaces or under pavers, bluestone, or tile
Creep Limited Strength	795 lbs/ft (ASTM D 5262)
Long Term Design Strength	688 lbs/ft (NCMA 97)
Ultimate Strain at Failure	14.4% (ASTM D 4595)
Ultimate Strength	1,200 lbs/ft (ASTM D 6637)