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My name is Neil I live in <!—-><!—-> <!—->Cambridge<!—-> <!—->Ontario<!—-> <!—->Canada<!—-> <!—->.<!—-><!—->
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I recently began building my dream workshop. I decided to heat it with hydronic in-floor heating. The slab was to be insulated with 2 inch rigid foam insulation. The slab was poured and the insulating placed under it, but to my horror no insulation was placed at the edge, only a ½ inch asphalt-impregnated fiberboard bond break. The building is 32ft X 32ft and otherwise well insulated. Backfilling has already been done and the majority of the slab will be above grade. The winters are cold up here, but the shop only needs to be heated to approx 60 F. My questions are, how bad will the heat loss be (ie. do I have to correct this oversight?), and if this can be corrected how is it best done (and most cost effective)? Thank you in advance for any help you can provide. Neil.<!—-> <!—->
Replies
Greetings Neil,
As a first time poster Welcome to Breaktime.
This post, in response to your question, will bump the thread through the 'recent discussion' listing again which will increase it's viewing.
Perhaps it will catch someone's attention that can help you with advice.
Cheers
Click here for access to the Woodshed Tavern
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As for how much heat you will lose through your slab edge, I have no idea. I would expect it to be fairly substantial, though.
If it was mine, I would attach vertical foam to the concrete. If you are concerned about drilling some sort of anchor into the slab and hitting a tube, you could fasten the foam with glue.
You'll not notice the difference. At worst, the floor will be a bit cooler for a foot or so around the perimeter. You should have no issues keeping the space at 60 degrees.
Mike Hennessy
Pittsburgh, PA
Edited 5/12/2008 8:48 pm ET by MikeHennessy