Replies

1. 
   calvin | Mar 20, 2010 01:37pm | #1

   Slip sheet or moisture "control"

   What's under the floor, crawl or basement or framed room.?

   While many of us have or do use felt under HW because of habit, old school, there are those that feel over a crawl of damp basement if offers a bit of moisture safety.

   If that is no concern, rosin paper has been used successfully as a slipsheet under hardwood.

   I have only had tube heat covered by floating floors so the pad take the place of either.  I'm not absolutely sure on this but when ordering a floor of this sort it should always be mentioned that radiant is under-so for one they give you the proper pad underlay and the floor above is rated at a certain running temp for the heat.

1. 
   Kungur | Mar 20, 2010 03:23pm | #2

   This is an exsisting floor.

1. 
   calvin | Mar 20, 2010 04:34pm | #3

   This is an exsisting floor?

   Either I confused you or I am real confused.

   You already have a HW floor with radiant under it and they used Felt paper under that hardwood?

   I'd better re-read your original post.

1. 
   DanH | Mar 20, 2010 04:36pm | #4

   I think he's planning to retrofit radiant under an existing floor.

1. 
   calvin | Mar 20, 2010 04:39pm | #5

   That's what I get for trying to post

   and watch basketball at the same time.

2. 
   calvin | Mar 20, 2010 04:40pm | #6

   I got it now, sorry

   I didn't read the damn thing and understand that you want to put radiant under that floor that has the felt.

   I cannot answer because you probably figured out why.  If doing this from scratch I would have used rosin paper. 

   Real sorry for wasting your time.

1. 
   Kungur | Mar 20, 2010 09:49pm | #7

   Not a problem. I know first hand what it is to have a brain cramp. I seem to have them quite frequently!

   I am going to rig up a heat source under a section of my exsisting floor to simulate radiant heat at the correct temp. Then I will see if I get a smell.

1. 
   DanH | Mar 20, 2010 10:44pm | #8

   Of course, you should ignore any (not terribly offensive) odor you get for roughly the first 6 hours of operation, as just about any construction material, when heated, will give off an odor.

2. 
   chrisl | Mar 25, 2010 06:57pm | #9

   I installed staple-up radiant floors under 50-year old oak floors that had felt paper between the subfloor and finish flooring. I've run it now for three winters and have gotten absolutely no odor at all.

   Chris.