----- Original Message -----
Sent: Tuesday, January 21, 2003 10:21
AM
Subject: Re: [Strawbale] waterproofing
the bathroom
> The problem with gaps is that the mice
like to live in them.
The gap is also a higher risk for condensation,
and (when we talk of greater surfaces) could act as a chimney if there were
to be a fire behind that cladding etc.
I like Harald's suggestion to push tiles in the
clay, but care needs to be taken on the joints as they will be the danger
zone.
The plaster behind the glued tiles needs to be
absolutely dry and finished settling in order to prevent cracking. When Tom
Rijven needs to garantee a no crack earth plaster he will wait for a year
(the 4 seasons with their caracteristics)before he will do the last
layer.
A bit further south than where you are, Marocco
offers an other suggestion. Taddelact (or whatever is your favorite
spelling)
A lime plaster that has been waterproofed by
'crushing it' with a stone during the curing and treated with what we call
'green' soap in Holland. (The grandmothers type). A very interesting
technique that we want to try in our bathroom on our SB wall. Search for
more info on the Internet, or take a workshop in Marocco with the experts.
Little warning, it gives an absolutely
beautiful finish, but may not be a simple owner builder technique.
Martin Oehlmann suggested a natural paint from
Holland that makes plaster waterproof. Seems the most simple to me, though
(linseed) oil should also work. The problem is only, what if it doesn't
work?
How to detect any moisture problems in your sb
wall before it is too late.
With a moisture meter, either bought at a
farmers shop or hand made (see TLS no?)
Bye,
Andre
----- Original Message -----
Sent: Monday, January 20, 2003 4:26
PM
Subject: Re: [Strawbale]
waterproofing the bathroom
Hi Rikki
I agree with Herbert's thinking. You'd be
best with some sort of rigid board that does not deform when wet to fix
your tiles to such as heraklith, or there are some clay boards available
commercially but not necessarily in your part of Spain. I'd try to only
tile the bits that get direct splash from water and leave the rest
breathable, and then there should be no need to leave an air gap. The
problem with gaps is that the mice like to live in them. If the straw is
loadbearing and therefore under compression, as long as you gave it a
close haircut before plastering (to reduce bounce) I would think you could
fix tiles directly onto the walls as you do for other wall systems. As far
as I know, this hasn't been tried before, but let us know if you do
it!
Best wishes and good luck
Barbara
Amazon Nails: Strawbale building, training, consultancy,
empowerment.
www.strawbalefutures.org.ukBuilding
With Straw Bales by Barbara Jones £9.50 post-free from Amazon Nails or
from Green Books
Warning! Strawbale building can
seriously transform your life!
----- Original Message -----
Sent: Monday, January 13, 2003 6:29
PM
Subject: Re: [Strawbale]
waterproofing the bathroom
Dear Rikki
Knauf is a gypsum-board, the problem is,
that such boards (even the cement-boards) tend to make a bow,
when
you fix the tiles on it or glue it to the wall (in combination with
water).
Better work with Heraklith-boards (3 - 5 cm, magnesium-glued)
and fix the tiles with cement-based tile-glue (Fliesenkleber).
You
need no space between board and straw. You only need space when you have
two materials - one cold (like stone) and the other warm (like
strawbale) because of water-condensation or as a ventilation-space. In
the last case you had to make holes above ground and under the
ceiling, so that the air could circulate. But in this case the damp
would go in the bales.
So: Make no ventilation space.
Best
wishes
Herbert
HI!
I am thinking of putting panels of
pladur or knauf (a type of cement board) covered with tiles in
the bathroom to protect the bales from the water of the shower (not
yet installed), but i was wondering if I should put a layer of plaster
under the board? Also, should I leave an air space between the
board and the bale wall, or should they touch? Does it matter?
any comments or alternative ideas are appreciated; I
haven´t started the work there yet, so I am open to other
suggestions . . .
MAY THE wings OF LIBERTY NEVER LOSE
A SINGLE FEATHER!
love , RIKKI
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