Lead code (10m gulley)

[Draughtsman]

What code and size rolls would this gulley need (approx. 350mm wide at base). I'd like to try and price the lead myself.

It's been priced to replace, with a new raised section/step in the middle. They reckon it'll be done in a day. Access to the roof is easy, without need for scaffolding or ladders. The flashing along the side won't need replacing.

That 10m run of lead with rolled joints has started creating ridges, one of which is just beginning to show a crack.

Thank you.

 

[Alastairreid]

Code 5 @ 450mm at a minimum, you will need steps or expansion joints put in every 1.5m approx.

 

[Nige F]

Google T-Pren lead gutter expansion joints....and Calder lead gutter expansion joints.... then find a roofer who can leadburn them in including the vertical seams up the wall. Leaving the original lead in situ. ( to me it looks fine and un perished, just the cracks where it's expanded.

 

[datarebal]

May as well Felt it .. few adaptions and low cost...