What are the recommended adhesives for dutchman repairs for sandstone?
----- Original Message -----
From: "Hammarberg, Eric" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, October 17, 2001 12:01 PM
Subject: Re: Sandstone and Epoxy


> 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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