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Old 08-21-2019, 07:18 PM   #1
sleeper bird
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Radiant heat floors

Been a while since iv been here,iv got a project that has two approx 100 sf bathrooms that has a radiant heat system specified.Thing is here in Louisiana we very rarely use under floor heating,the last time was about 10-12 years ago and we used the roll out cable and mat system with self leveler.It worked fine but iv been looking at the mat that acts as an uncoupler which I like,looked at rpm mats and schluter does anyone with experience with any or all have any recommendations?
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Old 08-21-2019, 08:59 PM   #2
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Ardex flexbone heat would be my choice.single pass fill and you can use there banding to have a completely waterproof floor and use there liquid backer board to cover the wires
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Old 08-21-2019, 09:12 PM   #3
jadnashua
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Ditra heat also can be made waterproof by using the banding on the seams. If you are putting this over a concrete slab, their version that has an extra thick layer of fleece on the bottom performs as a thermal break, making the heat respond quicker.
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Old 08-22-2019, 04:32 AM   #4
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i saw an ad for the ardex one in the tile letter mag.so the underlayment mat type are preferred to the net type that i used a while back?
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Old 08-22-2019, 06:39 PM   #5
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IMHO, a net mat is harder to embed properly and can make getting an even floor to them put the tile on tougher. All the work you might have done to make the subfloor nice and flat is then sort of ruined with the mat. If you choose to use SLC to embed it, it's an extra, maybe unnecessary cost and step. And, if you have areas that will not be covered by that mat, then you have a built in uneven surface to deal with.
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Old 08-22-2019, 06:51 PM   #6
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The last 4 or 5 heated floors I've done have been with Ditra Heat. Like Jim said, the wires snap down into the Ditra mat and aren't sticking up in the way. This is important. The net type doesn't lay flat on the floor. I use to use a lot of hot glue to get the net and wire down as flat as possible.
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Old 08-23-2019, 05:56 AM   #7
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As a novice, I installed the Schluter system over a 70 SF ish area (Laticrete has an almost identical system). It's about as easy as it gets. Perhaps there are some applications where one of the net type heat mats are useful or necessary but I can't envision any.
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Old 08-24-2019, 12:24 PM   #8
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The uncoupling mats are the way to go. Schluter has a good mat but, in my opinion, they have way too many ridiculous rules when it comes to spacing the wires that I won't use it.

What I use is the Suntouch Warm Wire and run it in Prodeso Heat mats which are surprisingly similar to Schluters . But Nuheat makes a wire too. Other heat mats that I've tried are Schluter's and Suntouch's which is relabeled from another manufacturer. All those mats are fine.

I haven't tried Ardex's Flexbone heat nor Laticrete's Strataheat but would have no hesitation using either. Honestly, I'm a bit curious about Ardex's system and would like to try it out.

I'd stay away from RPM pads as they have too many steps and there are no savings vs the uncoupling heat mats. Technology has passed them by, in my opinion.
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