Natural Stone Veneer Over Hardie Board

 
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Old 06-06-2010, 11:58 PM   #1
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Natural Stone Veneer Over Hardie Board


I'm set to start a job where the homeowner installed hardy backer board on the exterior walls. He wants me to apply natural stone thin veneer right on the hardy board. I have some concern here. Can we simply scratch coat the wall and apply the stone as we would over wire mesh?
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Old 06-07-2010, 12:12 AM   #2
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Re: Natural Stone Veneer Over Hardie Board


Hey greetings, Go back to the intro section and spill your guts.

I have seen stone, tile, rock installed over hardi backer. It's whats behind the hardi that is important & how the hardi is installed. I'll bet Angus or one of the other guys that really know what they're doing will chime in.

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Old 06-07-2010, 12:17 AM   #3
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Re: Natural Stone Veneer Over Hardie Board


"In accordance with National Evaluation Service Report NER-405, HardieBacker board is recognized only as an interior substrate."
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Old 06-07-2010, 12:32 AM   #4
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Re: Natural Stone Veneer Over Hardie Board


Quote:
Originally Posted by angus242 View Post
"In accordance with National Evaluation Service Report NER-405, HardieBacker board is recognized only as an interior substrate."
Don't doubt you for a second, but I have seen it a number of times in exterior applications. What is the down side?
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Old 06-07-2010, 01:02 AM   #5
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Re: Natural Stone Veneer Over Hardie Board


2 reasons.

1) Left to the elements, it can, well let's say "decompose". I've seen it totally break down when left outside.
2) James himself says not to use it outside.
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Old 06-07-2010, 01:03 AM   #6
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Re: Natural Stone Veneer Over Hardie Board


Why not just use metal lath???
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in texas with framing and cornish people will do it for 3.00 a foot. What do yall think about that? Just laber
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Old 06-07-2010, 01:07 AM   #7
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Re: Natural Stone Veneer Over Hardie Board


JJ, not arguing, just seen it set up this way. I agree, metal lath.
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Old 06-07-2010, 01:09 AM   #8
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Re: Natural Stone Veneer Over Hardie Board


Quote:
Originally Posted by angus242 View Post
2 reasons.

1) Left to the elements, it can, well let's say "decompose". I've seen it totally break down when left outside.
2) James himself says not to use it outside.
In the situations I have seen the Hardi is not directly exposed to the weather, it has just been "outside". Can you advise of a suitable exterior grade tile substrate?
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Old 06-07-2010, 01:10 AM   #9
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Re: Natural Stone Veneer Over Hardie Board


Having the Hardie already installed, I'd just walk away and look for my next job.
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Old 06-07-2010, 01:12 AM   #10
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Re: Natural Stone Veneer Over Hardie Board


Durock is suitable for exterior applications.

While not directly exposed, the Hardie will be subject to moisture & freeze/thaw conditions.

Bottom line, the manufacturer says don't so it.
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Old 06-07-2010, 01:14 AM   #11
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Re: Natural Stone Veneer Over Hardie Board


Quote:
Originally Posted by angus242 View Post
Having the Hardie already installed, I'd just walk away and look for my next job.
Thanks Angus.
Unfortunately, I can't walk. I'll just have it torn it out and go with lath. This is what I originally advised, but I'm just a big, dumb, white guy and don't know sh** from shinola.
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Old 06-07-2010, 06:22 AM   #12
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Re: Natural Stone Veneer Over Hardie Board


Well thanks guys. I'd rather walk away from a project than do it wrong just to save the customer a buck or two. Budget budget budget is all I hear on this project and I know cutting corners bites you in the azz every time. Glad I found this site, thanks boys!
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Old 06-07-2010, 07:26 AM   #13
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Re: Natural Stone Veneer Over Hardie Board


Who's project is this? I thought it was my deal, lmao
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Old 07-28-2010, 06:15 PM   #14
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Re: Natural Stone Veneer Over Hardie Board


Include in your bid to hang mesh over the hardy board... If he doesn't accept your price than just let it go... Hardy board doesn't hold as well as wire mesh...

I get it all the time where the homeowner try's to save a buck by installing this stuff themselves... However I won't touch it unless they let me hang wire mesh over it... that goes the same for concrete board!!!
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Old 07-28-2010, 06:44 PM   #15
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Re: Natural Stone Veneer Over Hardie Board


Yea thanks
That's what we ended up doing. He was so cheap he wanted to pull out and save the screws he used on the hardy board. People are funny aren't they? We did it the right way regaurdless so all is well. Thanks again!


Quote:
Originally Posted by AZ Stone Veneer View Post
Include in your bid to hang mesh over the hardy board... If he doesn't accept your price than just let it go... Hardy board doesn't hold as well as wire mesh...

I get it all the time where the homeowner try's to save a buck by installing this stuff themselves... However I won't touch it unless they let me hang wire mesh over it... that goes the same for concrete board!!!

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