Tuff N’ Dri with XPS
My concrete contractor is telling me that I can not (voids warranty) apply 2″ XPS against the sprayed Tuff N Dri foundation walls. She is recommending using Warm N Dri. Claiming that even when dry the sprayed waterproofing membrane will degrade the XPS.
Contractor is also saying that even with taped seams the water will get behind the rigid board and cause problems. Tuff n Dri sells a product called Warm n Dri which is vaguely described as a “rigid foam board with drainage capabilities.” What if there were no Warm N Dri, the water would be contacting the membrane then? What is the difference if it has 2″ XPS against it?
Is this a case of the manufacturer dangling a carrot “warranty” in order to get you buy more of their product.
I would use UGL Drylock and apply myself but as the temps here in CT have not climbed above very cold for a couple of weeks, I think this product is ruled out. Tuff N Dri can be sprayed on in 20 degree weather.
Side Note: Great job on this site, been reading every “green,” book, magazine, conference for years. You have all the experts in one place. Keep up the good work.
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