HEATED FLOORS: Electric System Makes for Toastier Toes

The phrase “cold feet” is more than just something someone says when they’ve lost enthusiasm. In some houses it’s a permanent source of literal discomfort each winter. Bathrooms, basements, floors over crawlspaces and those notoriously cold bedrooms over garages are all likely sources of suffering, and heated floors are part of a solution that has impressed me in my work over the years. I’ve installed this stuff myself and I know it works well if done right.

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Heated Floors: An Electric Approach

Mat-style electric systems for heated floors have been available for years. Trouble is, I’ve not been impressed with most. Some systems I’ve worked with aren’t customizable for each job, nor are they particularly reliable.  And when a heated floor stops working, that’s a big headache because all the flooring probably needs to come up to repair the bad mats. There is a better way, and you can see it below.

DITRA-HEAT by a company called Schluter is a heated floor system that uses an orange dimpled plastic uncoupling membrane to boost tile reliability and to hold heating cables. The grey wire you see here is what delivers heat, and it snaps into place in the membrane during installation, with tiles going down on top.

Heated Floors: A Simple System

DITRA-HEAT is the easiest to install and best-warranted option for heated floors that I’ve worked with. It’s my favourite by far. Unlike other systems, I’ve never had DITRA-HEAT let me down. The system includes a dimpled plastic underlay that’s made for heating cables to snap in only where needed. Anchor the special DITRA underlay to the floor with thinset mortar, pop the cable in place from a spool around cabinets, appliances and around other areas that need no heat, then cap the whole thing off with more thinset mortar and ceramic tiles. Time-of-day thermostat allows you to pay only for the heat you need, and independent control of heated floor temperature lets you dial in just the right amount of floor heat relative to room temperature. The DITRA electric heated floor system isn’t powerful enough to heat spaces entirely on their own, but they’ll make your feet a whole lot happier.

Installed in strategic places wherever it matters most in bedrooms, bathrooms or even just in front of the basement TV couch, electric heated floor systems offer a lot more flexibility for retrofitting spaces at economical prices.If you’re ever trying to warm up one of those cold, over-the-garage bedrooms, you’ll need to do more than just put wires in the floor. Two inch-thick extruded polystyrene foam sheets make great floor insulation. Cover the existing subfloor with this foam, then fasten a 5/8” plywood subfloor on top, secured with screws driven down into the existing floor and joists. There’s no need for strapping. The foam is dense enough to support the new plywood subfloor. Install electric infloor heating and new flooring and you’ll be a lot warmer. I know this works because I’ve done it.

Heated Floors Over a Garage

Is the ceiling of your garage under the bedroom open and uncovered by drywall? Spray foam insulation applied to the underside of the floor between joists will warm the bedroom a lot if you’d rather not insulate from above. It takes a total of 3” depth of closed cell spray foam to function as a vapour barrier in places where winter temperatures drop well below freezing.

Why not just use hot water heated floor system instead of electric? Hot water heating is an amazing technology, and electric heated floor systems aren’t good substitutes for it in larger spaces because they don’t have the heating power. That said, electric heated floor systems are more nimble and easier to install as a luxurious supplemental heat source in certain areas, especially when installing a boiler, valves, manifold and piping just isn’t practical for heating a small area with hot water.

Click here to learn about hot water heated floor systems.

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