[GSBN] Exterior plaster sealer?

[Tom Woolley]

If you add linseed oil to lime plaster it will improve the water  
proofing immensley though some say it reduces its breathability

Paint your render with a mineral silicate paint
e.g. http://www.keimpaints.co.uk/

should help a lot

It certainly deals with the driving rain in Ireland

Tom


On 21 Jan 2011, at 07:59, Darrel DeBoer wrote:

> We just finished a house a couple hundred feet from the Pacific  
> Ocean about 2 hours north of San Francisco.  The exterior plaster is  
> lime, flyash, sand and chopped straw.  The texture is smooth and  
> there's no vapor barrier.  The problem is it's quite porous.  Rain  
> soaks in without even thinking about it and there's a wet ring for  
> the bottom 6 inches (15 cm) of the interior of the bale wall.
>
> We've used this plaster in less frightening conditions with great  
> results, but this is a place where everything is tested: it's always  
> moist, the winds are amazing, everything rusts immediately.
>
> It appears we need more of a sealer than we have, so what will allow  
> vapor to escape? Water glass?  Xypex? Thompson's Water Seal?
> -- 
> Darrel DeBoer
> www.DeBoerArchitects.com
>
> download building codes:
> http://bulk.resource.org/codes.gov/bsc.ca.gov/
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Tom Woolley

Rachel Bevan Architects
80 Church Road
Crossgar
Downpatrick
BT30 9HR
tom.woolley at btconnect.com
028 44 830988


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