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Super Tough R as underlayment?

Posted by veloguru (My Page) on
Wed, Nov 16, 11 at 16:05

Hi, I am finishing a basement. I installed 1" ISO under the slab, and was thinking about laying 1/2" Super tough R panels on top of slab, then basement approved laminate flooring directly on top of that. I would also Tape all seams with Tyvek. Thought it would provide a moisture barrier as well as making the floor less cold. I don't have the headroom for a more elaborate insulation/subfloor system. Any thoughts? Thanks.


Follow-Up Postings:

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RE: Super Tough R as underlayment?

Polyiso is commonly available in compressive strengths of 16-25 psi , adequate for roofs where foot traffic is limited to installation and maintenance, not for an occupied basement.

Instead, use XPS, which comes in normal strengths of 40-100 psi.. But it must be followed by one or two layers of ply.

If you want to forego the insulation, use a bubble membrane product, such as Delta FL.

Before applying laminate, be sure the manufacturer warrants it for basement use and use the subfloor materials recommended.


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Followup

Polyiso under the slab is isn't very effective either.


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