"Dave Plowman (News)" wrote in message
...
In article ,
harryagain wrote:
Most lead has been replaced with various sorts of plastic these days.
You can buy plastic valley pieces and aluminium soakers for roof work.

Love to know what plastic has anything like the life of lead when exposed
to the elements.

Lead lasts for many decades. Even centuries.
However there is a move to get lead out of the environment.
Causes brain damage.
Could be TNPs problem.
Usually cracks appear in it on corners etc due to work hardening and
vibration with wind. Eventually.


Noboby knows how long the plastic stuff will last.
It is tested by the BRE.