Window in shower

Hi - I am a do it yourself type of person, but I am new to doing tiling.

Based on all of the great things I have read here, plus taking a tiling course at the local tile shop I feel pretty comfortable with most things. But there is something I havn't seen much on -
We have gutted the bathroom of our 60 year old home (the bathroom was the type with the concrete on the walls) and now will replace with the correct products (backerboard where appropriate, sealed drywall where appropriate and correct thinset).

The thing I need help in is that in the middle of our bath/shower there is a regular sized window. When we gutted the wall we thought there may be some moisture back there just because of where the window was in relation to the shower, but it was perfectly dry! Those people knew how to mud and tile!

The window is in the very middle of the wall. The bath/shower area is 5 foot wide. The bottom of the window is 2 feet above the tub, the window is 28 inches wide and 42 inches tall. The window is about 7 years old (we had new windows reinstalled when we bought this house in 2002).

Now we are going to insulate the outside wall and then put up the backerboard and then thinset and then tile on top of the backerboard.

Should I put some type of sealant (like roofing paper) between the backerboard and the studs?)

Is there anything else I need to be award of as we do the tiling of the surrounding walls of the tub?

Thanks in advance Pam.

I also have another questions but I am going to start a new thread for it.

Aluminum window, I hope!

Pam stay with one thread when you can so we can easily find and keep up with your conversation.

http://www.floorstransformed.com/ceramic-t/-/-in-front-of-tub-28774.html#reply=1

[Edited by Bud Cline Tile on Thu, Oct 22, 2009 at 2:49 pm CST]

Aluminum window, I hope!

Aluminum windows? Does anyone even make them for residential anymore? Would anyone buy them if they were available?

Anyway that would help the window, but the idea is to keep water out of the wall.

Jaz

Keeping water out of the wall is a lot easier with an aluminum window, maybe I should have mentioned vinyl also. Didn't think about those suckers at the time.

[Edited by Bud Cline Tile on Thu, Oct 22, 2009 at 9:30 pm CST]