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Topic by Brianh32877 posted 06-03-2015 08:18 AM 8239 views 0 times favorited 2 replies Add to Favorites Watch
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Brianh32877

1 post in 1212 days

06-03-2015 08:18 AM

i have built a frame in my living room for an Ethenol fireplace. I will be using a product called Ardex feather finish to give the exterior the look of poured concrete. I need to know what to face the frame with. I want to make sure it is strong enough not to flex to not have to worry about the concrete cracking down the road. I am thinking 1/2” plywood over the framing then 1/4” hardi backer over the plywood. I would apply the feather finish directly to the hardi backer using mesh tape over the seams. Should I put a bed of mortar between the plywood and cement board like you would on a floor or should i just use screws? Let me know what you think. Thanks



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bold1

26 posts in 1710 days

06-04-2015 11:52 AM

We use a type of plywood called plyform at 3/4 ” for subfloor and 1/4” hardi for tile set in thinset. All screwed down. This has worked well for us. The plyform is supposed to have less expansion and contraction than regular plywood. The mortar between is usually used if you have an uneven subfloor that the handi would want to span and crack at later. I see no need for the mortar as long as the wood is straight and the handi sets solid on the wood.

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Jean Garay

13 posts in 74 days

09-05-2018 07:06 AM

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