Anybody have any idea on when this form first appeared? (used very widely in
c19th terraced houses in London - inverted duo pitch roof with central
gutter generally hidden behind a front parapet wall). I'm guessing it's
late 18th century...
Butterfly roofs, the architecture style that lasts about as long as
it's namesake. That is until some bright young designer discovers a
new 2 stage design process.
Stage 1. Oh look! A new way to do roofs with a central box gutter.
Arent I clever, no-one has ever thought of this. Fame will follow.
Stage 2. Water isnt supposed to do that. What do you mean overflow?
How did that plastic shopping bag / newspaper / birds nest / hail /
snow / etc get there? Lawyers follow.
A few years later......
At a guess the time period would be correct. Industrial revolution >
pack em in closer to the workplace > modest spans > shared rising damp
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