On Fri, 22 Oct 2004 21:12:16 +0100, Simon Hawthorne wrote:

I notice that there are codes (3 and 4)? What does this mean, ...

The thickness, bigger the number the thicker the sheet is.

... and what sort should I be looking at for my job?

I'd go for code 4, unless you are very exposed in which case code 5.

Also, which of all the major DIY retailers would it best to try and
buy some from?

I wouldn't I'd go to a builders merchant. But do you need to replace
the lead? Can it not be redressed to the roof and the pointing
corrected?

--
Cheers
Dave. pam is missing e-mail