[GSBN] Sticking clay on top of lime?

[Derek Roff]

"I already suggested that to the couple, but they prefer clay finish…’

People drawn to natural building have hopes and dreams.  Generally, that is a good thing.  It is also frequently a problem, when our hopes and dreams lead us to try things that are risky, or known to fail.  How does a professional builder work with a client, who wants to follow a dream instead of the knowledge and experience of the natural building community?

Perhaps some small-scale experimentation can show the clients what they may face in trying to apply clay over lime wash.  Success can only occur if this specific clay can bond well to this specific lime.  A small test may show that adhesion is a problem.  Unfortunately, a test can’t show what happens over time.

Best wishes,
Derek

Derek Roff
derek at unm.edu<mailto:derek at unm.edu>




On Jul 27, 2020, at 6:09 AM, Tom Woolley <tom.woolley at btconnect.com<mailto:tom.woolley at btconnect.com>> wrote:

You might find Becky Little a useful person …she is a superb clay plasterer and she seems to mention in this article plastering onto lime mortars (not the same as Limewash of course)


http://thannal.com/clay-plasters-in-ash-cottage/


Dr. Tom Woolley

80 Church Road
Crossgar
Downpatrick
BT30 9HR
Tel: 028 44 831164






On 27 Jul 2020, at 11:03, Rikki Nitzkin <rikkinitzkin at gmail.com<mailto:rikkinitzkin at gmail.com>> wrote:

Thanks martin, but the idea is to work with bare hands. I already suggested that to the couple, but they prefer clay finish...

El 27 jul 2020, a las 12:00, M. Oehlmann <martinoehlmail at gmail.com<mailto:martinoehlmail at gmail.com>> escribió:

Dear Rikki,
What about a hemp-lime render?
Best wishes from an old farm up in the mountains of Haute Savoie.
Martin O:)

On Mon, 27 Jul 2020, 11:55 Rikki Nitzkin, <rikkinitzkin at gmail.com<mailto:rikkinitzkin at gmail.com>> wrote:
Hi all,

I have an unusual request. A couple who has been repairing an old stone home with lime mortar want to finish with clay plasters inside. However, although the existing finish is quite irregular, most of the stones are covered with lime or lime wash. Has anyone tried sticking a clay plaster on top of lime? I have never done that. I am worried that over time it will fall off.

I had thought to add a bit of lime to the clay mix in order to help it stick, but I would rather avoid it if possible. It would be great to be able to work without gloves…

I am attaching photos of the lime-finished wall, in case that helps.

Thanks!

Rikki

Rikki
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