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Discussion Starter · #1 ·
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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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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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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