In article , Adrian C wrote:
Roofer came to fix a few leaking clay tiles on our original 1932
roof. Chatting to him about doing a new roof, his advice was to
stick with the old tiles as the new red concrete tiles (fitted by
all our neighbours) were heavy enough to cause eventual structual
damage to joists and walls of the house. Anyone concur with this?

What sort of concrete tiles - lots of reroofing is done with Redland
49's or similar, about 12"x8" and although each tile is obviously
heavier than small plain tiles the overall weight is significantly
less. They are though much heavier than slates which is why you
often see sagging where tiles have been used to replace slates with
no thought of strengthening the roof.

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Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
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