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Tonglebeak 09-08-2011 12:05 PM

installing hardibacker board
I'm laying down hardibacker for a tile installation. I know the circles on the board are for screws, but what about the half circles on the edges? I thought they would be used for screws too, but when I screwed into one (as close to the inside of the half-circle as I could get), it made the board bulge out an eight of an inch on the side (which will prevent me from laying a piece straight against that side). Yes I am using the hardibacker screws.

Bud Cline 09-08-2011 12:09 PM

You're kidding!!!

I think the Hardibacker is to have a 1/8" gap between boards so...problem solved. You don't have to place the screws in the little circles to begin with.:)

Are you using fresh thinset 100% under each board?

Tonglebeak 09-08-2011 01:23 PM

No, I haven't. I went by what I was told at lowes. I just did a lot of googling after seeing your post, and saw thinset is the way it should be done. Another option I saw is to screw the hell out of it, so I'm going to go back through and halve the screw spacing (unfortunately, I don't have time to go pull everything back up, so I'm going to take my chances and hope for the best). Thanks for making me aware of that though, I'll remember it from now on.

Bud Cline 09-08-2011 01:27 PM

How did I know you were going to say that?

You should call the Lowe's manager and have him and his wife and kids come to your house and finish screwing down the boards.

Adding screws isn't an option I was aware of. Show me where you found that alternative method on the Hardi website...

give me a link.:)

firehawkmph 09-08-2011 07:50 PM

do yourself a favor and pull up the hardi board and thinset it back down, with the screws. You're wasting your time and money with the rest of the job if you don't. It'll be a lot easier than tearing it out after you tile. Do your research before going to a big box store. Haven't seen too many employees there that know much about anything.
Mike Hawkins:)

JazMan 09-08-2011 09:28 PM

Gee.....what a surprise, bad advice from one of the vest-wearing associates.:censored:


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