09:01AM | 05/22/06
Member Since: 05/21/06
1 lifetime posts
I am having a large deck redone and having tile installed. We had an unexpected rain storm last night and I am concerned. The deck is partially covered with Hardibacker. Because of the rain I went to the Hardibacker site and found more to be concerned with. Please advise.

I found that Hardibacker is not for exterior applications. He did not put down a bed of thinset under the Hardibacker. He did paint the plywood with semi gloss paint. He has installed it over plywood with staples. All of these seem to be wrong from reading on the website. If Hardibacker can be used on the exterior, how long should we wait for it to dry out?

Thanks in advance.


07:49AM | 05/26/06
Member Since: 12/27/02
545 lifetime posts
If you have concerns you really should relay them to your contractor, you both should feel comfortable with your project.

If you have researched your contractor, he is a professional & has good references then you should be in good hands.

Hardibacker is cementitious so getting it wet should have no repercussions, he may have used an exterior grade ply, then laid down a moisture barrier. The thinset would really only be used if the deck is uneven and the backer not laying properly, he may have only used it where necessary.

The ply would be glued so perhaps he feels that is all that is needed for fasteners in this application, I would screw it myself, but I'm not a tile professional. Also if the framing has the newer treatment with higher copper content then you may want to ask him if he used the proper fasteners ie stainless, double zinc, etc.

The movement in a exterior deck would also be a concern for me, my tile pro uses a solid cement base with embedded wire when laying out on an exterior deck. (see greenvalley project on my Alter Eagle site)

Alter Eagle Construction & Design | Construction & Design | | Decks, California outdoor living | | Molding and finishing | | Crown tutorial


08:21AM | 05/02/13
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07:13PM | 05/03/13
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