On Friday, 17 August 2018 00:57:09 UTC+1, Dave Plowman (News) wrote:
In article ,
wrote:
On Thursday, 16 August 2018 20:12:29 UTC+1, Tim Watts wrote:
On 16/08/18 19:20, Robin wrote:

The Victorian houses around here were build 125+ years ago for
working men and their families. The slates used weren't of the
quality you'd expect to find on a Gentleman's London residence[1].
After 125+ years a large proportion of most which remain are
delaminating, cracked, have enlarged nail holes etc. I saw how many
slates were sold on for re-use when our roof was replaced c10 years
ago. It was a quarter at most.

125 years? I'd call that pretty damn good for a roofing material!!!

The slate must be of better quality round here. A friend's 1880s house
is still on its original slates (bar a few), and they're in fine shape.
The tingles are slowly increasing though.

My brothers house in the NE of Scotland still has most of the original
slates. And it's closer to 200 than 100 years old. But the roof
construction is different, with tongue and groove boarding under the
slates - presumably to carry the weight of snow.

Tongue and groove was common 200 years ago, both my parents (Hertfordshire) and our house (Warwickshire) of a similar period have it.

Jonathan