Nickfromwales Posted June 5, 2023 Share Posted June 5, 2023 10 minutes ago, bmj1 said: Good news mostly. We've got space for 140-150mm or so of PIR. We'll be okay here. Happy days! 11 minutes ago, bmj1 said: Any thoughts on the best way to build this up ? The staircase will be finished with hardwood treads and risers. I.e. we could cast more concrete in a mesh and build it up that way, just wondering if there is a more sensible solution ? Just go with the concrete as anything else will be noisy to walk up / down on. The builder will need to shutter each step, but also to affix (with a gas nailer most prob) something like Expamet LINK to ensure the concrete stays in situ. Priming with neat SBR will help too. Link to comment Share on other sites More sharing options...
bmj1 Posted June 5, 2023 Author Share Posted June 5, 2023 (edited) 3 minutes ago, Nickfromwales said: Happy days! Just go with the concrete as anything else will be noisy to walk up / down on. The builder will need to shutter each step, but also to affix (with a gas nailer most prob) something like Expamet LINK to ensure the concrete stays in situ. Priming with neat SBR will help too. Yes! Big sigh of relief ! What about using sand/cement screed to build it up ? Edited June 5, 2023 by bmj1 Link to comment Share on other sites More sharing options...
saveasteading Posted June 5, 2023 Share Posted June 5, 2023 25 minutes ago, bmj1 said: but not enough height on each step Do you mean that the top or bottom are not set to suit the floor levels? Both wrong? Due to this change of plan re ground floor insulation? Link to comment Share on other sites More sharing options...
bmj1 Posted June 5, 2023 Author Share Posted June 5, 2023 2 minutes ago, saveasteading said: Do you mean that the top or bottom are not set to suit the floor levels? Both wrong? Due to this change of plan re ground floor insulation? I mean that all the steps are not tall enough. Simply due to the previous builder not following the drawings. We'll lose a little ceiling height on the first floor, but will still have 2470mm or so FFL to FCL, which I think is plenty for a bedroom floor. Link to comment Share on other sites More sharing options...
saveasteading Posted June 5, 2023 Share Posted June 5, 2023 So yes. You could prob make a reusable shutter, then do one at a time. 80mm is enough to make as concrete rather than screed. You could make a stiff, dryish mix with some fibres and it will allow you to move swiftly on to the next step down. Link to comment Share on other sites More sharing options...
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