Rethink Your Life!
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The Work of Art and The Art of Work
Kiko Denzer on Art
[Cob] Other components: How bad is Tyvek?Amanda Peck ap615 at hotmail.com
Mon Feb 16 17:13:03 PST 2004
I don't quite visualize what the order of layers is there. Can you just think, "the original inhabitants of this cabin probably just lived by the fire in the winter, unless they had some sort of powerful blanket/down/fur to sleep under, we can do the same!" (My dogs and I think anything above freezing is pretty good sleeping. But we do have the powerful down.) I'd consider that styrofoam stuff fastened to rafters/roof sheathing/purlins that keeps ventilation where you want it--the underside of the roof, below that insulation, and below that put a ceiling. If I've got what you're doing right. Even before I heard that the Feng Shui people hated exposed beams/rafters directly above sleeping people, I wasn't a big fan of them. Probably partly because I once worked for a construction company that put faux exposed beams in to try to give some class to their awful houses. I don't really think it did. David Atmoweg wrote: Greetings, everybody- A while ago the combination of light clay straw and wool came up. I was happy to report that there's finally a place in North America that offers wool as insulation. After two particularly tough winters, we're a little disillusioned. We're working on a two-hundred year old cabin in the Catskills, and used light clay straw for the walls, with which we're quite happy. We haven't even plastered over it because it's so lovely by itself. We tried to make panels of light straw clay to fill our rafter spaces, but the stuff proved awfully heavy to try to hang, and all the spaces are different widths and we ended up using wool. Now, the light straw clay doesn't let a lick of air through, so far as we can tell, but it takes a long time to warm it up. Its thermal mass seems to be working more as a heat-sink than a storage mass when it's below zero outside, and I'm wondering if we should seal it better from without. The wool, meanwhile, isn't living up to its R-value because this is a leaky, gappy old structure and wool batting doesn't halt a breeze. The upshot is we have at times a fifty Fahrenheit degree temperature differential between the floor downstairs and the air in the rafters. We wanted to cover the wool upstairs with burlap, which is cheap and low-impact and would look like a good compliment to the light clay downstairs, but we begin to think we need a real barrier up there. Our woodstove is churning out the BTUs and they're getting away from us. So the question is, do we buy three rolls of Tyvek, trap the wool upstairs and back the light-clay downstairs? We need to maintain some moisture flow for the light clay, of course, but we appear to be living in a seive now. Is Tyvek made in a toxic, wasteful process? What benign substance can we seal this place up with? I tried to infuse a sheet of burlap with beeswax, but it's just too coarse. Canvas might work that way, but it's expensive and heavy. Somebody out there has the answer, I'm sure... -d. http://www.flamingbunny.org -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm _______________________________________________ Coblist mailing list Coblist at deatech.com http://www.deatech.com/mailman/listinfo/coblist _________________________________________________________________ Click here for a FREE online computer virus scan from McAfee. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963
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