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No chance of moving the pipes, and I think making joists is a step beyond what I have time for, since it would require hundreds of precise notches in the joists and loads of PIR cutting to fit between them. The only half-solution that my bodger brain can come up with is to place 4mm ply boards...

I wish I could ask the builders that myself! :ROFLMAO: The ground floor's the kitchen and living room. Hopefully that's generously insulated underneath too but I'm not yet brave enough to drill through the screed on the ground floor to confirm. Ground floor is quite cool in summer because it...

Thanks, I'll look into the relative benefits of OSB vs plywood. Any reason not to use 22mm OSB instead of 18mm? That'll help maintain current floor height. The ground floor's ceiling. The first floor's ceiling is wooden joists with chipboard directly on top, but the composition of the ground...

Bit of a spanner in the works, I've taken the floor up and was met with 80mm of rigid insulation panel (Kingspan), so it's a floating floor, no wonder it creaks so much. The main surprise is that under the kingspan are heating pipes, and the void for them is made by putting 50mm Kingspan on...

Thanks, the partition walls are white aerated cement block (Thermalite or similar) with dot & dab plasterboard. I'll be finding out how they're supported this afternoon. Not a bad idea to reuse the chipboard, are they vertical and are they attached with brackets? I'm not completely confident I...

@JohnD Oh wow that's a really great explanation. Some of the steps I'd planned but at least half were really valuable extra nuggets of info so thank you! The info in your reply would be perfect for a Wiki :) I'll have an electric planer and electric sander ready as well so if my first cuts...

Oh great, thanks! That fills me with confidence to get this done. Is there a drawback in going with 22 m ply instead of 18? Apart from the price. I'm thinking I can save some skirting boards and leave some chipboard in place if I use the same thickness as the current panels. Could anyone...

Love this forum, I’ve been able to answer so many questions and am really grateful for all the time put into helping complete strangers to learn. My question is more about whether it’s pointless to attempt this rather than how to do it. My house was built in 2004 at the height of the...

I've installed a wet underfloor heating system over my ground floor subfloor and have just been told by a supplier that I can no longer buy the stiff boards that would have gone under the finish layer. My builder doesn't have experience with UFH so I'm asking for any recommendations for what...