Radiant floor heating.?
Can radiant floor heating be installed in the concrete pour, then after concrete has sufficiently cured (28 days) can a resinous coating, such as a epoxy/polyurethane floor coating be installed on a floor that will later be radiant heated. My concern is that these coatings are very moisture intolerant. Does radiant floor products, create any moisture in the slab that could rise to the surface. Does changes in temps affect the moisture levels in concrete. Electric radiant floor products seem to be best.
Pipes filled with hot water to me is a concern. Do the pipes "sweat" causing condensation or are they wrapped. I am currently on a large project and these questions are coming up in the design forum.
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February 23rd, 2011 at 8:48 am
RADIANT FLOOR HEAT WITH WATER IS THE MOST EFFICIENT WAY TO HEAT A FLOOR. IT DOSE NOT SWEAT. WE HAVE A 9000 SQ. FT. SHOP ALL IN FLOOR HEAT WITH A GEO THERMAL HEAT/ COOLING. PAYBACK ON THE EXTRA COST OF GEO THERMAL IS 7 YEARS. ALL OUR FLOORS ARE EPOXY SEALED.
February 23rd, 2011 at 8:48 am
On the contrary, radiant floor heating using hot water is actually better than electric and more economical as well.
For bathrooms they use a styrofoam floor for these that the plastic line threads back and forth through (the styrofoam looks like tight packed spools, with just enough room between to snap the plastic line in). Then they pack it with a very dry and fine concrete mix (looks more like wet sand) that is levelled and then left to harden for 24 hours. They suggest a fibrous vapour barrier be placed over this before putting down whatever flooring you desire.
http://www.concretenetwork.com/concrete/radiantfloorheating/index.html
According to the above site, water heating is the least wastefull and the most easily controlled.
February 23rd, 2011 at 8:48 am
There are three types of radiant heat for floors. First there is the electric, also the water, but there is also a product called "AirFloor" which uses a multi-duct system that is poured into the concrete. These little network of ducts replaces the standard duct system for the building. Either way you go, moisture shouldn’t be a problem. If you are worried about the resinous coating, go with a true polished concrete. It will last forever and is maintenance free. As long as the building is kept at a constant temperature, sweating shouldn’t be an issue. Good Luck