Building with Straw Bales by Jones Barbara

Author:Jones, Barbara
Language: eng
Format: epub
Publisher: UIT Cambridge Ltd.

FIXING POSTS FOR A WINDOW

HEADER TIMBER SLOTTED ON TO FIXING POSTS

header. If this is the case, don’t forget about the compression gap for settlement.

Weather protection

The detailing around windows in particular is very important, as the junction between the window, sill and plaster can take a lot of rain and so you need to be especially careful to make sure this is done very well. Carol Atkinson used the design shown overleaf, which adds extra protection at this point, for her windows (this is pictured on page 128). Details for ensuring good weather protection around windows and doors are included in Appendix 4.

Framework methods

In framework methods, windows and doors are designed into the framing, and usually have upright posts either side of them that run from the baseplate to the beam above. These posts can be of various designs. A timber frame style would use solid timber and a compressive frame would use posts, the design of which was compatible with the method of lowering the frame once all the bales were in position. The framing sill is fixed after the straw below it has been placed and compressed manually (see ‘Fixing posts’, on previous two pages).

With a framework, the dimensions of windows and doors do not need to be multiples of bale lengths, but the design should ensure that the gap between one fixed post and the next does relate to full or half-bale lengths, to make the bale installation easier.

If there is a bale between the top of the window and the beam above, framing must be designed to carry the full width of the bale, and for compressive frame methods allowance should be made for settlement of the top beam or wallplate on to the straw.

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