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[Cob] PlanterDirtcheapbuilder-Charmaine Taylor tms at northcoast.comMon Feb 5 17:54:41 CST 2007
I plastered over a metal drum with my lime-paper mix and figured it would all fall off. but I also gave it one coat of waterglass.. and after 2 wet winters nothing has got soggy, etc.!!! the colors have faded from the sun, but the plaster itself has turned back to a limestone, and the waterglass ( thick like egg white) seems to have protected it. here is link to the photo, I used liquid bluing and drizzled it down full strength, but now it is a light blue only.. the colorful glass"necklace" is broken pipe and bong glass tossed out that I salvaged. waterglass can be bought at reasonable cost from www.chemistrystore.com.. type in sodium silicate barbara Roemer gave me a small jarfull, and that is what I used, not sure where she got it, or what brand/type. here is an email from Ed From: Raduazo at aol.com Date: February 24, 2005 5:06:01 PM PST \ writes: waterglass on cob benches and where in Northern California or Oregon can it be bought??? Yes You can buy it from Post Apple Scientific inc. in PA 16428 and it will waterproof cob however; I have heard that if the waterproof surface gets damaged and water gets into the cob it will not allow water to evaporate properly. I have had good luck with linseed oil. It penetrates deep into the cob and forms a deep waterproof layer not just a surface cover. My playhouse at Green Spring has had 60 inches of rain with no roof or water protection what so ever other than the linseed oil. Ed On Feb 5, 2007, at 2:38 PM, Michael Montagne wrote: I'm wondering if a planter is a good application for my next cob project. I have an oven and a bench but the plaster work is not weathering the Portland, Oregon winter as well as I have liked. Now I'm pondering a front yard planter. Perhaps with mosaic tile. But how to waterproof? Or is it just forcing an application that is best left to a material other than cob. -- Michael Montagne michael at themontagnes.com http://www.themontagnes.com _______________________________________________ Coblist mailing list Coblist at deatech.com http://www.deatech.com/mailman/listinfo/coblist Charmaine Taylor Publishing www.dirtcheapbuilder.com PO BOX 375 CUTTEN CA 95534 USA Tel: 707-441-1632 New Books-DVDs-CDs on Natural/House Building
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