From:
"George Graham" <georgergraham@zzzzzzzzzzz>
Date:
Wed, 19 Jan 2005 08:23:56 -0500
Subject:
fire damaged rock
Tomas,
Please accept my condolences for your loss.
In case you have not , please inspect the integrity of the surviving
masonry. The expansion of granite when heated can cause major cracks.
I've had good results from traditional stone cleaning acid when cleaning
monuments. Its comes in crystals and is diluted with water. All the monument
supply people have it, but we need to hear from masonry experts on what acid
would do to mortar joints.
Sandblasting would be a last resort for me. It does so much damage to the
stone and joints and dulls the character of the wall.
I hope you can save the work your father did. To have his work that can be
lived in, and touched by your family now and in the future is a special and
rare thing.
Sincerely,
George Graham
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