Tuesday, 18 November 2008

Frame completed, cladding skins under development

Sunny weather with the last of the autumn leaves made it possible to finally complete the click-raft structure. I'm continuing to explore and develop options for the roof and wall cladding skins. The long term aim for the roof is a fully openable louvre system. However for now it is much cheaper and quicker to realise a simple flat skin of polycarbonate. I have been experimenting with different slopes, one version based on a shallow arch held down along the edges and lifted at the centre with additional props. This has a pleasant symmetrical quality to it however would drain water to both sides requiring two sets of gutters and tanks. So the option I am working on is asyemmetrical with only one gutter to the back wall (east) requiring less material, and only one water tank. (not unlike the Citroen 2CV prototype minimal approach).
The wall skins will differ, the east wall will be 2500x1250mm vertical polycarbonate panels, while the west will be three sets of 2000x250mm horizontal louvres with rubber seal joints between. The challenge is to get all of the details sorted to work just as well thermally in winter with no gaps or drafts, as they do in summer with openable vents and louvres. Once these things are sorted out and realised, then I can move onto the ends.

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