DIY Doctor

Wooden plank subfloor for tiling over

Postby Conor333 » Thu Jan 14, 2021 4:24 pm

Had a leak in the bathroom.

Removed tiles and old laminate type subfloor.
Wooden planks sitting on joist now. Some of the planks were damp and had a black layer on them. Dried them out and will apply a treatment to them. Are they suitable for reuse with a hardie backer board on top prior to tiling? Or should I remove and put down plywood?

Also, if I keep them, what adhesive can I use between them and the backer board?

Thanks
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Conor333
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Postby stoneyboy » Fri Jan 15, 2021 10:00 pm

Hi connor333
The floorboards will be fine, follow the installation instructions on the Hardiebacker web site.
Regards S
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Postby Conor333 » Fri Jan 15, 2021 10:41 pm

Thanks. Would a mat like ditra be sufficient or should I use a cement backer board?
Conor333
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Postby stoneyboy » Sat Jan 16, 2021 11:36 pm

Hi connor333
There are many decoupling mats on the market but if you are just doing the loo may be worth finding a friendly tiler who can sell you a piece off a roll. Make sure your floor is sound and fixed down and remove the loo, hand basin and bath side framework to give a clear working area.
Regards S
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