Code of lead for bay roof

[FB]

Hi guys

My flat bay roof covering was recently changed to lead. I have just discovered that the builder used code 4, but everywhere I have looked suggests code 5 should be used.
Will code 4 be ok?

The roof is 2.5 x 1m max

 

[Regencyroofingipswich]

Should really be code 5 minimum or ideally 6.

Expect it to split in about 15-20 years from movement of the lead expanding and contracting.

Hopefully he has done it in two sections or it could have even less of a lifespan!

 

[Cumbrianroofer30yrsexp]

I always use code 5 for such jobs.As stated if there is not an expantion joint in the middle of the roof then its a problem waiting to happen=It will get stress fractures for sure.No expantion joint will mean 5-10 year life span.

 

[FB]

Thanks for the info. The sheet is one piece. I will discuss this with the builder.

 

[FB]

Hmm.. I have just spoken to the builder who seems to think it will be ok because the roof is only a maximum of 1m wide. He took advice from the supplier.

 

[Cumbrianroofer30yrsexp]

Hmm.. I have just spoken to the builder who seems to think it will be ok because the roof is only a maximum of 1m wide. He took advice from the supplier.

He is talking rubbish,code 4 lead should be fitted in sections not exceeding 1.5m.Take 6 inch lead capp flashing?thats only 6 inch wide but that must be in sections not exceeding 1.5m.Have you paid the guy?if so do not,not until there is an expantion joint fitted.What you should be asking yourself is what sort of tradesman should be asking advice from his supplier?it is he thats supposed to be the professional not the guy selling the stuff at the building merchants.

 

[Cumbrianroofer30yrsexp]

Before commencing any leadwork it is important to remember the following
basic rules:
Individual pieces of lead sheet must not exceed the recommendations of the Lead
Sheet Association. In particular, each piece of flashing in Code 4 must be no longer
than 1.5m.

http://www.wickes.co.uk/content/ebiz/wickes/resources/images/gil/22.pdf

 

[datarebal]

2.5 mtr is over sized end of story.