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Discuss Underfloor heating between joists in the Tiling Advice | Tile Forum area at TilersForums. USA and UK Tiling Forum

Simon Dale

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Hi all
Just looked at a job where builder wants to put down 22m chipboard over joists then Ditra. I said nooooo. The heating system is wet on a polystyrene board with aluminium trays screwed to joists. I have mentioned giffa flooring. The joists are 400 centres so could probably use the 18mm. Any advice on this would be helpful as the builder will do whats best for a change. :rolleyes::rolleyes: 05a3b681-59a1-4306-90c9-173cb86040f3.jpg
 
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Waluigi

Sounds like a job for Hardibacker, No more ply, Pro Ply or that Dukkaboard XL

I know for a fact that Pro ply is designed to go above UFH systems as I’ve read the technical data sheet. Not entirely sure on the others although it’s widely known that HB is OK above UFH.

Would have to be a thicker board though which limits some choices
 
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Simon Dale

TF
Esteemed
Reaction score
5,333
Sounds like a job for Hardibacker, No more ply, Pro Ply or that Dukkaboard XL

I know for a fact that Pro ply is designed to go above UFH systems as I’ve read the technical data sheet. Not entirely sure on the others although it’s widely known that HB is OK above UFH.

Would have to be a thicker board though which limits some choices
Im not in Hardie good books at the moment :D:D:D
 

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