Lead can be a difficult medium to use but here at Renowned Roofing all of our staff are trained to the highest lead work standards possible, it also helps having 100 years experience!
Dependant upon its use there are several different codes of lead. Code four would be used for flashing around chimneys and code five for large gullies or lead roofs.
An inexperienced roofer would probably use the wrong type of lead which in itself would create additional problems