PEX Tubing Layout and Install for In-Slab Radiant Heat
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- Опубліковано 9 лют 2025
- In this video we use our story pole to lay out our PEX tubing pattern on insulating foam for an in-slab installation. Then, using our RHT Foam Stapler, we attach the PEX to the foam with the help of an uncoiler, following our tubing pattern. The end result is a garage floor ready for a topping pour. To see a video of the pour, check out our other videos.
This is archaic , I bought Amvic foam panels , top looks like LEGO knobs, step on pet tube it snaps in place plus protects tubing keeps everything in place , I did my 30 by34 basement in a hour and half , plus it come with hi R value and vapour Barrier
Is it much more expensive? This looks cheap but functional for people on a budget.
Does pex have to be installed on foam or a board? Can it be installed directly on the concrete slab with clips?
Always always always fill all of the pex with water before pour. We didnt on our 1st go round & had cracks everywhere. The pipes heat up from the concrete cooking off & heave so fill them with water all loops, completely full. I ended up tiling the entire ground floor to solve the problem. Yikes! Do your research & talk to a few pros b4 taking anything new on.
How far can i run a loop? How far up is your foam on the perimeter?
I depends diameter of pipe how long loop you can do, smaller pipe shorter loop.
aren't you supposed to sleeve where it will enter and exit the slab?
Ideally, yes. The tubing at the exit point of the slab can be a shear point. Also, you don't want to damage the tubing when you trowel the concrete.
what kind of EPS pallets have you used as insulation under the pex tubes??
Does it matter that it's at the bottom of the slab and not centered in it?
+harperjmichael Not really because the heat loss inside the concrete is negligible. It is lost when it reaches the concrete surface and hits the air (or the flooring you have above the concrete).
The answer really comes down to your type of floor covering. If you're looking at just having an open concrete surface that has a good heat transfer ratio, then you can get away with installing towards the bottom. If you were to install a thick carpet or another material that is going to act as an insulation, then the closer to the top of the slab the better..
harperjmichael yes it does. you want it fairly close to the surface.
actually it doesn't matter at all. it will just take more time to heat for the initial start up...
There’s no staples left in Canada.
How many zones would you put in a 24x30 house?
Just one if you want it all on one thermostat. I would run 3 loops of 1/2" at 240 feet each if it were my job
The rebar over the pex?
it doesn't matter, the pipe is strong enough.
Here we install rebar mesh which has smaller rebar but smaller caps between them and then tie PEX to rebar.
Rebar should never be at the bottom of the slab, that is what "chairs" are used for to elevate rebar off the bottom . So adding the rebar above the led makes the slab stronger and less prone to cracking.
Sorry, led should be pex. Autocorrect is a pain sometimes.
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how it works LEE