Hi, Looking for advice please. We have a 1902 semi and decided to put in underfloor heating in our lounge. The original timber floorboards were in wooden joists. We laid wooden battens under the joists and laid celotex insulation on top about 60mm below the joists. Thermoduo wire has been stapled to the insulation and levelling screed put in top to about 5mm below the top of the joist. The floorboards are going back down and 6mm ply on top before Amtico is laid. My question is how long do we wait before the screed is dry before putting down the floorboards? Screed was laid a week ago, Amtico is due to be fitted 5 Dec, is this long enough thanks!