In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Hi folks, I'm doing an above floor installation using 3/4" plywood sleepers with stamped aluminum plates. I have a guy helping with the installation who doesn't believe the pex will expand if we hold it tightly enough in the plates (controlling the spacing of the sleepers so the plates are snug and the tubing presses in tightly after). I'm just concerned that the pex will want to expand somewhere, and if it can't expand laterally should I just leave a bit of space at the end of each run for the loop to stretch out lengthwise?
P.S. I'm using REGULAR pex. Not Pex-Al-pex... The system is running off a high eff condensing hot water tank with heat exchanger. I have no plans for an outdoor reset, although I could be convinced if it will make a big difference. The house is newly renovated with good insulation and vapour barrier, so heat loss should be minimal. The radiant floor heating is my primary heat source, so it will be fired up for the entire heating season (which, in Toronto, Canada can be up to 6 months).