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Re: GSBN:Re: Danny Buck's moisture NM


for our guest house at the Atlantic coast, I strongly think of applying a
silicat paint from Keim "Granetal" on lime (St. Astier). Keim has different
silicat paints even for tropic situations.

Another option to protect the outside wall I ponder of using Heraklith
boards and stuccoing them with lime. These boards Datasheet - Heraklith-BM
(Acrobat PDF-File), screwed on wooden I-beams in the wall (inside Fermacell)
and will be ventilated (50mm). Than the strawbale 1 x sprayed on both sides.

Heraklith: magnesite-bound wood wool lightweight special grade board for
inside and outside,
with universal properties of thermal insulation, sound protection, fire
protection and lining board.

Its a rather expensive but seems to be promising save. What do you think?

I could send a drawing for discussion.

Best wishes, Martin

----- Original Message -----
From: "Chris Magwood" TLSEditor@...
To: "GSBN" GSBN@...
Sent: Thursday, November 11, 2004 9:21 PM
Subject: Re: GSBN:Re: Danny Buck's moisture NM

> >My feelings these days are that under no circumstance should we allow
> >moisture to enter a straw bale wall in any form from the inside or the
> >outside.  Why take a chance on the moisture finding it's way out of a
> >wall?  Therefore I am of the opinion that we should make sure that
> >moisture in vapour or solid form cannot get into a bale wall.  Therefore
> >we should treat the finished coat of render accordingly and use methods
> >and materials that will give a water proof wall from BOTH sides.
> I think John raises an interesting issue here. I've always stuck by
> the breathable argument, and have seen some surprising examples of
> drying taking place this way after significant soakings. But I, like
> John, don't want to leave it to this process entirely.
> I have lately been experimenting with silicate paints (from Eco-House
> in New Brunswick). They claim an excellent water repellancy (is that
> a word?) and little effect on breathability. I can attest to the
> repellant qualities... even on earthen plasters water will bead and
> roll off. But does anybody know for sure if the breathability is as
> good as is claimed? If so, I think the silicate paints are something
> that could be widely promoted for straw bale. They seem to be
> relatively non-toxic (again, based on manufacturer claims) and
> created with natural materials, the colours are excellent, the cost
> is reasonable... Seems like it could be an excellent solution to one
> of our biggest concerns, and an easy one too, if it works like it
> seems to work.
> Chris
> --
> ***************************
> Chris Magwood / Camel's Back Straw Bale Construction
> <a  target="_blank" href="http://www.strawhomes.ca";>http://www.strawhomes.ca</a>
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