Hi all, Just had a new 65mm 4-1 with fibre screed laid on top of UFH through the downstairs of our house. We need to live with it for a while before we put the final floor down and I'm after advise on the best thing to avoid the dust that comes from walking on it. I have heard of two options below, which one would be best? laying polythene Q: can this be any polythene? or using a sealer Q: When can this be applied to new screed?