November 26, 20241 yr Author 2 hours ago, Raine said: Thanks @Canski. Did you install wet UFH with the posis? If not, do you have no heating on that floor, or rads / elec mats? Good point on the U values too. Something for me to bear in mind as the design fleshes out and I get SAP calcs done. I have spans of ~6m so solid timber is a no go, I assume. No we went with Rads for the first floor with heated towel rails in the bathrooms that either run from the heat pump or electrically on a timer. I looked at spreader places for UFH and decided against it due to cost. Pozi joists are ok at 6m but you may need a steel beam in the middle.
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