Re: [Strawbale] waterproofing the bathroom

[Herbert Gruber <d.sign@aon...>]

Title: 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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