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Unread 01-12-2020, 12:02 PM   #3
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Join Date: Jul 2001
Location: Boerne, Texas
Posts: 89,289
Welcome, Antonio.

If you'll go to the Advanced Search feature, type in exterior and niche (all three words), ask to Search Entire Posts, and ask for your results as Posts, you'll find several hundred posts on the subject. Lot of different ways people have handled the problem.

I agree with Goldstein. In your climate, doing that in a 2x4 framed exterior wall is a very poor idea. Even if you don't mind your shampoo being frozen or very cold, it's still not good for the tile installation to be changing temperature to the degree and speed likely in a shower application.

Even as far south as north Texas I've had water pipes freeze in exterior 2x4 walls when the insulation was not well handled.

My opinion; worth price charged.

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