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Hardibacker over drywall

5735 Views 3 Replies 4 Participants Last post by  angus242
For years I've installed 1/2 hardi over 30lb felt stapled to studs. Last week I spoke to another contractor who uses 1/2 drywall over the studs. Then laminates felt with roofing adhesive to the drywall. Then the hardibacker.

He says that is makes for a stiffer wall behind the tile. Does anyone use this technique? Any comments? What type and size screw would I use to make up the additional 1/2"?
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That sounds like wasted overkill and an invitation for mold issues.

Is this in a shower? God I hope not. Gypsum has no business anywhere near a wet location.
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