If I knew the answer to that they might make me a director of preservation
somewhere. Researching causes of glaze spalling is actually a little beyond
our normal scope of work. But if I were doing research into causes of glaze
spalling, I'd be looking at whether the effect is in any way analagous to
epoxy flooring system failures in slabs on grade. You can't blame freeze
thaw indoors. You can't explain it in terms of hydrostatic pressure. I've
heard some questionnable arguments about alkalinity and osmotic pressure.
But if you get moisture stuck under an epoxy floor, it ends up looking a lot
like glaze spalling.

Then there's the green and black bio-growth under the glaze. Are they
digesting the bisque at the interface?

Edison Coatings, Inc.
M. P. Edison
President
3 Northwest Drive
Plainville, CT 06062
Phone: (860) 747-2220 or (800)697-8055
Fax: (860)747-2280 or (800) 697-8044
Internet: www.edisoncoatings.com
E-Mail: [log in to unmask]

>
> So, Mike, not to burden the list with too much preservation content,
> what does cause the glaze to spall of 1960's brick?     Just, like,
>  vapor build up or something?  Or is this black magic.
>
> Sign me,
> Actually It's A Dodge To Get Into the Haagen-Dazs Vanilla Fudge
> Every Couple Of Hours
------- End of Original Message -------

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