Posted By newbostonconst on 08 Mar 2021 01:07 PM
NO PAD....
Concrete or Lightcrete is way better and cheaper then plates. We use rebar wire ties(zip ties work but are slower) and poultry staples(can use any strong staple) to hold the tubing to the sub floor. Then cover with 1-1/2 inch or more of concrete. We then glue down the floor....There are some great glues out now....I can list the one we use if needed.
This will give you a lot more even heat and thermal mass. If your house is supper efficient it wont take much energy to heat the house and thus the floors won't be as warm as they used to be in older houses.
Thank you for reply, but how I said I'm using already the heat transfer plates in my install so no discussion about concrete or lightcreet here. Yes, glue can be an option which I don't like it as if I would like to replace it in the future will be a problem, nail it is an option but again change it in the future not an easy job so that is the reason why I would like to go floating and idea of not using pads under engineered hardwood I believe is not a good one. So, any experience with installing floating engineered hardwood? Pad, no pad, what kind of pad???