We have a glass hearth 12mm thick onto a solid wood floor. The bottom of the legs never get more than warm to the touch at floor lever for a raised stove like our. We got the hearth made by a glazing company to get a good proportion seem to remember it was about £140 4 years ago. I seem to remember it is larger than the regs insist in front of the fire to look in proportion.
This is the stove and the fitting that was installed in the outside of the chimney.
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Stove 4[/url] by Big Surfer[/url], on Flickr
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Stove 3[/url] by Big Surfer[/url], on Flickr
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Stove 2[/url] by Big Surfer[/url], on Flickr
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The top 45 degree bend from the stove is actually a T with one end of the tee coming down to the trapdoor on the outside of the chimney. It does work well but a decent chimney sweep should easily be able to sweep from inside without making any mess. The guy who fitted the stove charges us £40 to clean the chimney so I let him do it rather than buy my own brushes.