Fireplace hearthstone/extension, only 1.5 inches deep?


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Old 11-16-16, 09:11 AM
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Fireplace hearthstone/extension, only 1.5 inches deep?

We had hardwood floors put in, and the wood burning traditional fireplace, the bottom of which is flush with the floor, needs a new hearthstone in front of it. What USED to be there was slate on top of a big bed of concrete, but the way they had so much concrete was by building a wooden box resting on a joist that was cut out to house the box, which wasn't really structurally sound. That joist was replaced, so now what we have is 3/4" subfloor and 3/4" hardwood floor, giving us a total of 1.5 inches. My wife wants new hearth stone to be flush with floor. The stone vendors in the area have said there is no way to get a single piece of any kind of stone, because all the stone is 2" thick, and that's not even including whatever we'd use as the mortar or to set it in, etc. One guy said our only hope is 1.25" granite.

Does anyone have any ideas of how we can get a hearthstone of one piece into this 1.5" thickness? Is poured concrete a possibility, or is 1/5" also too shallow for that? Would our second best bet be pieces of stone, or would the pieces also be thicker than 1.25"?

Would 1.25" granite be a bad idea? We're looking for options, with preference being for 1 solid piece flush with floor. Any ideas/advice welcome. Total size of stone would be about 22" out from fireplace, about 53" wide, with notch cut out in middle to snug it up to actual fireplace floor, which comes out a little bit from the wall.

If there is a better forum category for this, please let me know.
 
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Old 11-16-16, 10:15 AM
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Is your hearth stone functional or decorative? It depends on your wood stove. Some do not radiate much heat down to the floor and are even approved for use on wood flooring. Other stoves radiate a lot of heat and there must be a fireproof hearth. In that case the hearth stone will also have to be protected from touching wood as the stone itself could become very hot.
 
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Old 11-16-16, 10:59 AM
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This is traditional wood burning fireplace, not stove. The hearthstone is in front of the fireplace and slightly to the sides. Kind of like this picture attachedName:  fireplace.jpg
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Old 11-16-16, 12:34 PM
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Here is a .pdf that will give you some guidance. Check with your local codes though. You'll notice that the hearth must be at least 2" thick and supported by non-combustible masonry. So, no matter what you use it will have to be supported by masonry and not your wood floor.
 
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Old 11-16-16, 02:41 PM
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Thanks for that. So it sounds like it is impossible for us to do anything. because we have 3/4" floor, then 3/4" subfloor. And under that is the joists. So unless we notch out the joists (which you're not supposed to do) to create an area under the floor, we cannot meet these guidelines.
 
 

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