Mike,
"inadvisable" is what I thought too. I was wondering if Mr West and Epperly
had different opinions or experiences.
Eric Hammarberg
Associate Director of Preservation
Associate
LZA Technology
641 Avenue of the Americas
New York, NY 10011-2014
Telephone: 212.741.1300 extension: 1016
Mobile: 917.439.3537
Fax: 212.989.2040
email: [log in to unmask]
-----Original Message-----
From: Michael Edison [mailto:[log in to unmask]]
Sent: Wednesday, October 17, 2001 11:37 AM
To: [log in to unmask]
Subject: Re: Sandstone and Epoxy
The use of epoxy based repair mortar for exterior sandstone repair is
inadvisable for a number of reasons that have to do with compatibility. The
most significant issues are related to thermal expansion, moisture and
modulus of elasticity. Basically, even if you are careful to formulate an
epoxy mortar for sufficient vapor and water transmission rates (which is
possible), it will still tend to distress the surrounding stone as
temperature and moisture content change due to inherent differences in
response to these environmental conditions.
Exterior use of epoxy with masonry in general should be limited to those
situations where the effects of thermal expansion and moisture are not as
critical. The concrete repair industry learned this lesson the hard way a
couple of decades ago.
Mike Edison
Edison Coatings, Inc.
----- Original Message -----
From: Hammarberg, Eric
Sent: Wednesday, October 17, 2001 9:05 AM
To: [log in to unmask]
Subject: Re:
Could you share your info with the rest of us, or at least me?
Eric Hammarberg
Associate Director of Preservation
Associate
LZA Technology
641 Avenue of the Americas
New York, NY 10011-2014
Telephone: 212.741.1300 extension: 1016
Mobile: 917.439.3537
Fax: 212.989.2040
email: [log in to unmask]
-----Original Message-----
From: Peter epperly [mailto:[log in to unmask]]
Sent: Wednesday, August 29, 2001 11:47 AM
To: [log in to unmask]
Subject: Re: <no subject>
Call me. I have ben working on sandstone patches for years at Stanford U ,
and feel that it dos`nt get much better than this. I would feel very happy
to give this info to you in respect for the industry. Best Regards,
Ben Epperly 510-928-3254
----------
>From:
>Date: Mon, Aug 27, 2001, 5:18 PM
>
>Is anybody aware of any standards for patch repair of
>sandstone, particularly the use of epoxy stone (sand
>and epoxy mix used as a patching material)?
>
>I think there is some activity within ASTM regarding
>some standards for repair of stone buildings
>(committees E06 on Performance of Buildings and C18 on
>Dimension Stone) and can get access to any draft
>documents being prepared there.
>
>Looking forward to hearing any thoughts.
>
>Cheers
>
>david west
>
>___________________________________________________________________________
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