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zimmech 08-25-2011 08:12 PM

mortar for bathtub
Our new whirlpool tub needs a mortar bed. Do we lay the mortar directly on the subfloor? We had planned to replace the current underlayment with ditra - can that go under the mortar, or is that just a waste of money?

Thank you for any assistance!
-Cheryl & Bill

oh'mike 08-25-2011 08:42 PM

Use masons mortar ---Right onto the subfloor---no benefit putting Ditra under the tub

Bud Cline 08-25-2011 08:43 PM

No reason to spend the DITRA under the tub.

The mortar bed (usually sandmix) is placed directly on the floor but you should first put down a piece of plastic or roofing felt or something to separate the mix from the subfloor.:)

Bud Cline 08-25-2011 08:45 PM

Oh' (speedy fingers) Mike.

Beat me to it.:laughing:

zimmech 08-25-2011 09:23 PM

Thank you so much, Bud and Mike!

zimmech 08-26-2011 06:00 AM

We are removing the walls, and just because its easier, are thinking of installing 1/4 drywall right over the existing ceiling. This would avoid having to move the insulation while we work. The house is a ranch. What are your thoughts on this? Could this action result in moisture buildup between the layers and problems down the road? The ceilings are plenty high - 8 feet.

We appreciate your help!
-Cheryl & Bill

oh'mike 08-26-2011 06:08 AM

Overlaying drywall is done all the time without issue.

You should be fine.----Mike----

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