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Old 11-21-2012, 11:40 PM   #1
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Small Pieces of backerboard


I am installing a new granite countertop over the holiday and have a question about how to install these small pieces of hardie board. IT is 1/2" thick and about 1.25" inches tall.

I tried using hardie board screws and it broke in half. I also tried using some roofing nails I had with the same result

should I try drilling pilot holes through the backerboard so it goes through no problems???

here is what i am trying to do
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Old 11-21-2012, 11:41 PM   #2
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Small Pieces of backerboard


my other idea is to just apply the mortar directly to what is already there although i would prefer to not go that route as IT is not correct

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Old 11-22-2012, 01:01 AM   #3
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Small Pieces of backerboard


did you try predrilling the holes for the roofing nails?
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Old 11-22-2012, 06:57 AM   #4
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Small Pieces of backerboard


Are you simply using that as a sub base for a slab?

If so the cracked backer should bot affect the slab---you did not mention the brand of backer board---Hardie is difficult to set and frequently had issues with protruding screw heads----I use Wonder board or Durrock.
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Old 11-22-2012, 08:51 AM   #5
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Small Pieces of backerboard


Those pieces will have 1.5 inch pieces of granite attached to them
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Old 11-22-2012, 09:38 AM   #6
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Small Pieces of backerboard


Finish attaching the backer--set the slab in a bed of thinset and you will be fine---

Next project use Wonder board--

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