Step-by-Step Instructions and Pictures: How to Install Electric In-Floor Heat

By Spike Carlson
How to warm a bathroom floor from below by adding electric heat under the tile. Read an overview for how to install electric in-floor heat.
From The Family Handyman
Installing Electric Infloor Heat
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1. Test the heating cable for manufacturing or shipping damage with a volt-ohm meter. The resistance reading on the mat label (in our case, 31-35) and the resistance registered by the meter (in our case, 33.2) should be within 10 percent of each other. If not, see the manufacturer’s instructions. Digital volt-ohm meters like the one shown cost less than $30 and are easy to operate.
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