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XPS tape
Sukhoi29SU
Member Posts: 90
Any recommendations on the best tape to use for foamular 250 xps foam for under slab radiant application? I’ve read about some pricy tapes (Siga wigluv, for instance) that might work nicely- but I don’t necessarily need to spend the extra Money on a tape designed for air tightness for wrapping a house since this will only be used to tape the seams for foam laying on the ground. Thanks in advance
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Comments
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When I installed my radiant heating system in my Morton building in 2005 I taped all my 2" pink Styrofoam together with duct tape.0
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I was hoping to get a response like that. I was considering doing the same.0
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I also used a good grade of duct tape when I did mine and a few customers over the years.0
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Do you have a vapor barrier underneath or are you using the foam as a barrier? If the latter, duct tape or anything else not designed to be used as a barrier is not going to be one and "Tyvek tape" is a necessity. If you have poly underneath, use whatever you want or don't tape it at all0
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@GroundUp thanks for the responses , guys. I’ll be using a 15mil stego wrap vapor barrier underneath the xps foam. (I asked about where to put the vapor barrier in a recent thread here... I had received some recs to place it above the foam). Anyway , You make a good point- I cant think of a reason to even tape the seams based on the vapor barrier underneath. I might use a good duct tape - just for peace of mind...0
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thick, quality packing tape with urethane adhesive may perform the same as the official tyvek tape.0
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We put the vapor barrier under the foam, and I have never seen anyone tape the foam.
Rick0 -
We've come to the place that we use Creteheat board almost exclusively. It serves as the vapor barrier and insulation and drastically reduces the installation time.
That being said, if you're gonna use another method, I wouldn't skimp on anything - especially tape. How much would that really save of the total job cost?
Remember: what you're doing is virtually forever. Once the concrete is poured, you don't get a second shot at it.Bob Boan
You can choose to do what you want, but you cannot choose the consequences.2 -
@rick in Alaska what keeps the concrete from getting under the foam and floating it to the top. Once that happens you would never get it back down.0
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