Straw Bale Construction

I know this isn't an appropriate technique for a long spanning commercial building however the drainage system was mentioned in the lecture. I am also keen to research how it works as my parents have just submitted plans to build their own straw bale house.

http://groovygreen.com/index.php?option=com_content&task=view&id=267&Itemid=57

Building With Straw

Written by Michael d'Estries

Monday, 14 August 2006

As long as appropriate moisture control measures are taken, straw bale walls can last as long as any other conventional systems. However overhangs are required in order to keep the rain (if it ever comes) of the walls. These overhangs should be about 45cm and the bales should also be raised 60cm off the foundations to reduce capillary action of ground moisture. Cement is mixed with lime to increase the permable properties and allow the straw to ‘breathe’ and release any moisture. Rebar is also imperative to stop the straw from getting wet and structurally failing. Rebar is a metal used to spike the bales together when fitting them as a wall. Flashing is required at the top of the walls to allow the water to divert the water away from the straw.