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Old 08-28-2018, 08:23 AM   #1
BillyBoy
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Bathtub underlayment?

Second bathroom remodel, first went great with all advice from this forum. Only question for now is after gutting the bathroom (5x10) do I run the underlayment under the new tub? 2x10 joist, 5/8 subfloor, 10' span. Planning on 1/4" hardiboard, thinset under and 12x12 porcelain tile in the body of the floor (not under tub). Thanks
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Old 08-28-2018, 08:54 AM   #2
Kman
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If the tub hasn't been installed, then yes I would put the underlayment down first. But I wouldn't remove the tub to do so, unless you see some evidence of water damage (or any type of damage) around the tub.
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Old 08-28-2018, 09:15 AM   #3
BillyBoy
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Thanks Kevin, old tub gone new one going in. Another question, 1/2" hardiboard better than 1/4"? Big benefit or just overkill?
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Old 08-28-2018, 11:40 AM   #4
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On floors? No benefit. I'd use 1/4".
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