April 8, 20215 yr I have floor joists and have put insulation board between them. I am then using pre grooved floor grade 22mm chipboards which I put the pipes in for my underfloor heating. They ask for a 6-9mm ply to be placed over the top before the final finish. At the moment the final finish will be a vinyl tile or laminate. I am just off to the building materials supplier and realised the price of ply may be really quite expensive. Can I use anything cheaper without causing issues? Cheers.
April 8, 20215 yr I cant see any reason why it has to be ply, you could use Moisture Resistant MDF. Im guessing the boarding is to give some protection to the pipework and distribute floor loads.
April 8, 20215 yr 6mm ply isn’t that expensive and is more resilient than 6mm MDF. MR MDF is about the same price as ply anyway.
April 9, 20215 yr If you are intending to use any form of glue down flooring, LVT etc you will want to use ply. Don't use MDF. I doubt you will be able to get any sort of G/Tee from your glue down flooring company, if you are asking them to stick down to MDF.
April 9, 20215 yr Author Thanks all, look like about £300 for the ply so will have to go with that I think.
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