[Strawbale] Concrete Base - foundations question??

Cummings, Simon Simon.Cummings at nationaltrust....uk
Tue Apr 3 15:59:08 CEST 2007


Thanks for this information.  I think I'm getting closer to my answer.
Trying to explain in words exactly what you are trying to achieve is not
a simple as a diagram.  

So would this sound right?

1. Lay a concrete/limecrete foundation xx.xx mm deep.
2. Lay a course or two of blocks with at least a 100mm cavity between
the blocks (rising quite a bit higher than the base!).
3. Lay timber frame on top of blocks (point 2.) for SB to be placed
4. Place SB on frame and away we go



-----Original Message-----
From: strawbale-bounces at amper....muni.cz
[mailto:strawbale-bounces at amper....muni.cz] On Behalf Of
Stewart at tshargrave....uk
Sent: Tuesday, April 03, 2007 1:48 PM
To: European strawbale building discussions
Subject: Re: [Strawbale] Concrete Base - foundations question??

On 2 Apr 2007 at 14:59, Cummings, Simon wrote:


To actually try and answer your question...

In my experience, nearly all SB buildings have some sort of foundation
plate that the 
straw bales are built upon. That is to say, a wooden platform, usually
about 100mm 
thick and about as wide as a bale, running all around the edge of the
foundations, and 
anywhere else a SB wall is to be built.

Because of the hollow nature of this plate (it's usually made of
studding sandwiched 
between plywood, or similar), it allows the bottom of the bale a little
ventilation, and even 
drainage, if necessary. It also, importantly, raises the bale above
floor level, so that if 
there is any water spillage it won't soak the bales. On a solid concrete
floor, this will be 
important. Given the intended use of your building, it may even be a
good idea to make 
the plate a little thicker, so that the bottom bale is raised a little

I've also seen a goatshed build upon loose laid concrete blocks (laid
flat, lengthways 
across the foundation, each separated by a couple of inches), though I'm
not sure this is 

Environmental consideration are of course important, but I also happen
to thing that 
pragmatism is important. Responsible use of concrete (and steel) can
have a place in 
SB building.

Stewart H.

    European strawbale building discussion list

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