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Mortar, and again! FIRE.

Stone Conversations : Archive 9 : Message 00330

From: "daedelus lanthanien" <daedeluslanthanien@zzzzzzzzzzz>
Date: Mon, 30 May 2005 22:17:30 -0500
Subject: Mortar, and again! FIRE.


Hello Shawn,
This is interesting that you have asked this, I am sure it will spark one of
our current discussions. We have been discussing the suitability of certain
stones and fire exposure.

IMHO. It will not matter if you install the granite in fireclay, it will be
destroyed eventually. It is ok to use it as a hearth, but my advice is to
not to install it on the firebox floor, this is a job for proven refractory
materials.

Tinting fireclay can be done but it loses some of its strength, and
resiliency to heat. Some colors being worse than others because of their
chemical properties. Your sailing into dark uncharted waters I feel. I would
suggest running some tests before you put your name on it.

Using thin granite is a little iffy too if you are bonding it to a wooden
sub-floor. 3/8" tiles are penetrated by heat quickly. A friend of mine had a
burning log roll onto his tile hearth once and it burned a huge hole in the
floor under the hearth after soaking through the tiles. Are you sure that
you are approaching this correctly? Have you made an installation of this
type before?

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