I have a bunch of leftover Hardi panel siding (4 x 8 sheet scraps) that I am thinking of using as tile backerboatrd. Any reason not to do this? I assume it is the same material, but maybe not? I asked the same question of the folks at Hardi tech support and got a very brief “don’t do that” response, but when I asked why not, I got no answer. Is there a good reason not to do this or are they just trying to sell more product?
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
By considering things like energy-efficient mechanicals, window orientation, and renewable energy sources, homes can be evaluated to meet the energy codes. Here's what the IRC has to say.
Featured Video
How to Install Cable Rail Around Wood-Post CornersHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
I'm sure JunkHound wouldn't bat an eyelash. I'd be a bit more hesitant, and kind of think "what's the point?", given that decent tile board is reasonably cheap (even if the Hardi stuff isn't).
Wall or floor? Wet or dry area? How big an area total?
No Can Do
Hardi siding products are not designed for use as tile backer in shower alcoves.
Hardi siding products are not intended for use in locations that can become water saturated and have even demonstrated problems when used as siding where it is exposed to splashing water...even when factory painted.
You will have no warranty if you use the anything other than HardiBacker for tile underlayment, and run the risk of further damage to wall framing and having to do the job completely over if you use siding instead.
Hardi reps said it best: DON'T DO IT.