I’m doing an infloor heat system on an existing 12×28 barn slab. It will have bolted down sleepers with 1-1/2″ poly insulation between , then another sleeper with the tubes set in concrete between. Antique flooring will be nailed over. I am having trouble deciding what the best layout for the sleepers would be.I don’t want to use a full 2×4 16″ oc . Any suggestions are welcome as well as general info on this type of installation. I”m using a HW heater outside the in a small shed outside the building for heat. Thanks, John
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Greetings JME2, As a first time poster Welcome to Breaktime.
Somehow you slipped thru the cracks seeing we're going on two weeks late in addressing your post.
This post, in response to your question, will bump the thread through the 'recent discussion' listing again.
Perhaps it will catch someone's attention that can help you with advice.
For information on your infloor heat, you might want to scroll down in the lower left corner of your screen where there is a search function that will take you to previous threads dealing with whatever you type in the search bar.
If you type in 'radiant floor' or other keywords of the subject matter you'll get a supply of data from those old threads.
Cheers
'Nemo me impune lacesset'
No one will provoke me with impunity
bump
'Nemo me impune lacesset'No one will provoke me with impunity
an alternative would be a continuous foam layer, overpour on top of that, and then a thin plywood layer on top of that to give you something to attach the wood flooring to. In my opinion, that actually works better. Yeah, you have the thermal resistance of the top plywood, however the concrete hits it everywhere. In sleeper systems, the concrete rarely stays level with the top of the sleepers, and the resultant air gap inhibits performance. It does work, but not as good as it could.
And, no bolting.
With any thin pour, however, keep your tubing to 9" o.c. or tighter. with two layers of wood between, it may not be as critical, but do it anyway. Worst case your performance will be slightly better... best case, you have avoided heat striping on the floor surface.
-=Northeast Radiant Technology=-
Radiant Design, Consultation, Parts Supply
http://www.NRTradiant.com
I hardly ever disagree with NRTRob, but would make this suggestion:
I'm assuming that the initial sleepers planned WILL be 2X4 nominal because you suggested 1 1/2" extruded. So then go ahead and bolt those down as planned, lay the XPS in, except then cut 8" strips of 3/4" plywood, lay those as sleepers with aluminum plates and PEX, then put your hardwood over. That will give you the faster response time of low-mass and some insulation from the slab.