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Cob: greetings all!Shannon C. Dealy dealy at deatech.com
Mon Oct 1 20:40:33 PDT 2001
On Mon, 1 Oct 2001, nigella1 wrote: > Hello everyone, nigella here, I was a member sometime ago and had to leave > due to time restraints. Anyway , I am back :) > I have a question. I have seen some cob structures (pics) that are smooth > as glass and some that had straw sticking out everywhere. I imagine at least > some of this is for intentional texture but how do you get the straw pieces > smoothed off , if you want them off? The smooth as glass look in photos is almost certainly a cob plaster over the surface of the completed wall, and straw sticking out everywhere is the normal look of a freshly completed unplastered wall. To achieve this look, a cob plaster mix is made using fine fibers such as manure and/or really short straw fibers. Usually, it will be a high sand mix and all ingredients (sand, clay, straw) will be run through a sieve to remove any large chunks and other junk. When you apply the plaster you can use a thin piece of flexible plastic (such as the cut out center of a cottage cheese container lid) to float the surface, the longer you work it, the better it will look. You may want to experiment with this a bit, I working from memory and it has been several years since I did any cob plastering. You could search the coblist archives for related postings, it seems like I wrote one or two on plastering: http://www.deatech.com/natural/coblist/ If you have trouble accessing the web site, let me know, I'm having trouble with my primary internet feed, and at times about 1/4 of the net has connection problems. Shannon C. Dealy | DeaTech Research Inc. dealy at deatech.com | - Custom Software Development - | Embedded Systems, Real-time, Device Drivers Phone: (800) 467-5820 | Networking, Scientific & Engineering Applications or: (541) 451-5177 | www.deatech.com
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