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Tank a wet room with former tray?

Posted by pristem p, on Thu 23 Nov 2017 04:05pm

Hello, I live in a ground floor flat of a Victorian house and my builder just tiled over the former tray of the wet room without tanking it, he said as we are in the ground floor is not necessary, however I'm worried about the wooden joist underneath. I will seal myself the grout as now is too late, however how much this can last until the whole thing will need to be rip out and done again with tanking?

Peter Howell

Thu 23 Nov 2017 08:11pm

Always tank in a wet room what ever floor it’s on it would be foolish not to and could cause problems in a relatively short period of time It’s hard enough to stop water related issues as it is without missing out a process during the installation of a wet room system

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martin wilburn

Thu 23 Nov 2017 07:10pm

You always need to tank in a former tray as the tiles and grouting won't provide a water tight finish. Any wooden floor joists below will become water damaged in a relatively short time

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