Rethink Your Life!
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Kiko Denzer on Art
[Cob] Soundproofing cob on a bamboo lath?Raduazo at aol.com Raduazo at aol.com
Mon Feb 16 16:42:38 PST 2004
I do not know if this would help, but I just did a cob wall over bamboo lath. Bamboo was split with a conventional 5-way splitter and applied to a conventional stud wall using "horse shoe nails." That is the U-shaped nails sometimes used for attaching fabric or wire to a wall. You need to use these nails because bamboo splits and pulls away from ordinary nails, and you need to hold the nails in a pair of needle nose pliers to drive them. This was then covered with a layer of cob with chopped straw pushed through the openings in the lath, followed by a layer of straw/clay plaster, a layer of horse manure/clay plaster and a final lime plaster. The resulting wall is much more massive than a conventional drywall surface. I think it is important that the inner layer of the wall has a different harmonic frequency than the outer wall to block sound. Plus I have conventional insulation between the walls. I did not do enough of this to determine if it was of any acoustical significance, but it should cut sound, and the wall cost less than $1.00 since the bamboo, the clay, the straw and the sand were all free. I am still on my first bag of lime for a 10 x 9 foot cob wall and a 3 x 9 foot bamboo lath. The store bought lime is the only ingredient that cost money. Ed
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