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Floorboards https://www.wickes.co.uk/Wickes-P5-T+G-Chipboard-Flooring---22mm-x-600mm-x-2400mm/p/164536
Backer boards - benefit of polystyrene core boards is that they stop water soaking in as well as not disintegrating/rotting when wet.
https://www.insulationexpress.co.uk/marmox-multi-boardWaterproof tape
http://www.marmox.co.uk/products/accessories/waterproof-tapeI just used standard flexible tile adhesive to fix the marmox down - ended up with solid floor that doesn’t creak or flex and didn’t make a big step into the room.
Layers bottom to top:
P5 moisture resistant floorboards
Flexible tile adhesive
Marmox boards
Marmox tape (seams and edges)
Flexible tile adhesive
TilesThinking being that if the tiles or grout fail, the layer underneath is essentially tanked and it that fails, the layer underneath can cope with some water.
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Dramatic_Hammer
@chrisbmx116
Cheers all.
@Dramatic_Hammer sounds like a rabbit hole I'm happy to dive down, any links to the gubbins you bought?