Do you know why some sources say that a DPM shouldn't be used with anhydrite with UFH? Or have I misunderstood that.
So is the approach essentially right, but you're saying P121 isn't great? What's the worst that can happen given that I've used P121?
Hi all, apologies in advance for the newbie question. I’m not in the trade, however we’re going through a renovation currently and we’re stuck...
