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Headline

Seven-year-old zero carbon school demolished due to leaks

Comment

We do not know exactly what the failure mechanism is for this project and even traditionally-designed constructions can leak if incorrectly detailed and built but there is a general point here to be made. It is possible to design a building that is a so-called 'Eco ' building and minimise the risk of internal water ingress. What one needs is wide eaves, gutters and external downpipes leading to external tanks. Reduce parapet gutters and internal gutters where possible (these may not be able to be designed out easily on some plan forms). But where they are internal, keep them as wide and easily accessible as possible. With climate change in mind, rain storms will be heavier and more intense. Our response in this practice is to design where possible wide eaves and gable ladders so if the rainwater disposal system is overwhelmed, the water can cascade off without getting into the head of the walls. Our latest completed church has overhangs from 0.5m - 1.8m and overflow spouts to the catch-pit the end of wide zinc-clad sloping box gutters (this is at the 1.8m overhang) .And our two recent private houses (including a hemcrete house) have generous overhangs and gutters . But the outlines are less sleek (so less magazine-friendly for publication) and gutters are a lot harder to model in 3D in a hurry!

Posted date

7 December, 2016

Posted time

3:26 pm

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