[GSBN] Control joints (was Re: Lime plaster and expansion joints)
John Swearingen
jswearingen at skillful-means.com
Wed Feb 11 17:07:40 UTC 2009
John, what's your fibre mesh? And how do you assure that a crack along the
wood would not allow water to (eventually) get inside the bale wall...how
does it escape without doing harm?
John
On Tue, Feb 10, 2009 at 5:51 PM, John Glassford <jacksflat at gmail.com> wrote:
> G ' day
>
> Just an idea. What we are doing is this; with houses anyhow. We are using
> a hybrid method combining the bales and the window and door frames to
> support the roof. The frames usually 250mm x 50mm go the full height of the
> wall and after compression; done by all thread in pairs every 1.8 metres;
> these frames are then locked into the top plate.
>
> Thus we have a perfect expansion joint wherever windows and doors are
> located. We then render to the frames and cover the edge with skirts or
> architraves. The wall is now protected for water penetration even if the
> render has a crack where it joins the timber. We find that using this
> method we have not experienced any cracking on the vertical.
>
> With walls with no windows and doors over 3 metres long you would expect
> cracks in cement renders and our experience is such. We do not get any
> cracking in earthen renders with plenty of straw or chaff. However these
> earthen renders are not easy to apply with a pump. So for commercial
> buildings and the like we use lime and sand which we pump on. We then apply
> a fibre mesh to the second coat and to date zero cracking even in walls 24
> metres long and 5.4 m high.
>
> I will post some photos to the web site below one day soon.
>
> Kind regards
> The Straw Wolf
> Huff 'n' Puff Constructions
> http://www.glassford.com.au
> 61 2 6927 6027
> In Australia (02) 6927 6027
>
> The Orphan Rescue Kit Africa
> http://theork.com
>
> Mountains of the Moon 2010
> http://www.mountainsofthemoon.org
>
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>
>
--
John Swearingen
Skillful Means
www.skillful-means.com
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