How does Retrofitted Snow Melting work for an existing concrete patio?

One option is saw cutting the grooves into the existing concrete for cable placement and filling the remaining grooves with a sealant. This depends on the preferred finished surface, an alternative option may be to install the cable or mat over an existing surface, overlay in mortar and then have brick, stone or tile installed on top. When working over an existing concrete surface, ensure that the heating cable never crosses the existing expansion joints.

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