waterproof before tile


Old 01-12-10, 10:20 PM
Thread Starter
Join Date: Feb 2009
Location: Vancouver, BC, Canada
Posts: 62
Received 0 Votes on 0 Posts
waterproof before tile

I am redoing my front porch.
It is approx. 8ft by 3ft.
I have put down 3/4in ply. with joists spaced at 14in, the short way.
I want to put down tile, what is my best way to waterproof the ply. before I lay the tile?
I have thought of using a membrane type of product.
Does what you lay have to have some roughness for the mortar to take.
Sponsored Links
Old 01-13-10, 04:20 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,967
Received 5 Votes on 5 Posts
You won't lay your tile on plywood. You will lay down another 3/4" layer of plywood and 1/4" or 1/2" concrete backer underlayment wherever your tile will be, properly screwing to the plywood per manufacturer's instructions. It comes in 3x5 sheets, so you will only have one seam, unless you plan on wrapping the edges. Some would probably recommend the use of Redguard painted on the cbu to enhance the waterproofness of the cbu, since it will be hit with water with every shower or storm.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title: