I am installing an engineered hardwood floor over a subfloor with radiant heat tubes installed already. The radiant heat tubes have been covered with 1 1/2" of gypcrete. I will be installing this in a floating floor application and would like to find an underlayment which has a low R-value so as to not provide too much resistance to the flow of heat from the floor below. Any suggestions as to brand, thickness or place to find information on this would be very much appreciated.

I am looking for information on installing pipe in a concrete floor for radiant heat. I am planning on using plastic coil pipe connected to a gas water heater with a circulator pump. Has anyone done this? What should I do or what shouldn't I do? Any tips? Thank you.

We bought a house recently, it's about 30 years old. We never asked the previous owners how to use the heat, stupid yes I know! It has central air that was installed about 15 years ago, the vents are in the ceiling, duct work in the attic/crawlspace. Now, the heat. There are thermostats in each room, but no convectors, only one in the foyer and one in a basement room. The appraisal says "radiant heat". We turned on the thermostat in the bathroom (on high) and still felt nothing. My husband checked the wires and it is drawing ampage for something! But what we have no idea. Also, our hot water heater is electric. Can anyone tell me how this might work? What are we doing wrong?

I bought a weekend house last fall with radiant heat and mostly wide-plank pine wood floors. To save energy in the winter I turn the heat down to 45-50 degrees when I leave on Sunday night. I turn the heat back up on Friday evenings but it can take over 24 hours just to get back to 60 degrees. Once the house has warmed up the system is fine. The house is new (less than 10 years old) and well-insulated. I've gone into the basement and felt the hot water running through the system within minutes of turning it on.