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Old 01-10-2012, 12:24 PM   #1
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Shorter screws for 1/4" Hardibacker?


I have radiant heating tubes running under my subfloor. When installing the backer board it is painful, impossible in some situations, to try and hit joists for every seam. We are using thinset to set the backer board in. I have used 1-1/4" screws on every joist, but there are a few locations where a shorter screw would be nice. Say 3/4" - 1". Any chance I can find a shorter screw that will work in this situation?

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Old 01-10-2012, 10:31 PM   #2
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Shorter screws for 1/4" Hardibacker?


Hi Yogi,

You are not supposed to hit the joists when installing the backer, it's fastened into the subfloor. 1 1/4" wouldn't penetrate the joists much anyway. You can use roofing nails instead of the screws. But 3/4" fastener is too short. I'd stay with 1 1/4". Your tubes aren't that close to the subfloor is it?

Jaz

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Old 01-11-2012, 09:17 AM   #3
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Shorter screws for 1/4" Hardibacker?


Jaz,

Thanks for the reply. Yes the tubes are ONIX by Watts and they are stapled directly to the underside of the subfloor.
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