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[Cob] cobbing a metal stoveDulane silkworm at spiderhollow.comSun Nov 23 17:39:32 CST 2008
Could you make a 'underlayer' of cob mixed with vermiculite or perlite? Then finish with a layer of regular cob or plaster? Perlite is used for firestop plasters using Portland cement. You'd have to experiment with your mix. Perlite breaks down when you crush it. In the following Wikipedia entry, they show a mix that just looks like powder, but perlite is normally puffy, like little pieces of popcorn. http://en.wikipedia.org/wiki/Mortar_(firestop) -----Original Message----- From: coblist-bounces at deatech.com [mailto:coblist-bounces at deatech.com] On Behalf Of Charmaine Taylor Sent: Sunday, November 23, 2008 12:32 PM To: coblist at deatech.com Subject: [Cob] cobbing a metal stove How do you handle the problem of cracks in the cob, due to the metal wood stove expanding/contracting more than the cob? The result is excellent in terms of thermal performance, but there are some unsightly cracks in the cob. Not serious but annoying. Robert ++++++++++++++++ This will be my first winter with a cobbed edge on the stove -- so I can't say yet.. I am just now preparing the stove. I could also use a very high lime -clay mix and see if it just converts back to limestone and stays put without cracking.. I cant say yet. thanks for the warning-- I will alter my recipe and I htink I will use a rolled tube of wire mesh to hold the cob 1/2 inch from the face of the metal itself, possibly the heat dispersion will not affect the cob as hotly if not in direct contact? we shall see. -- Ms. Charmaine Taylor/ Taylor Publishing 707-441-1632 www.dirtcheapbuilder.com www. papercrete.com PO Box 375, Cutten CA 95534 _______________________________________________ Coblist mailing list Coblist at deatech.com http://www.deatech.com/mailman/listinfo/coblist
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