Very rarely will you encounter a home that as been built without some form of leadwork on it, whether it's on a chimney, valley, or the flashing on a single story extension.
Lead is an integral part of your homes ability to remain watertight, and without it, or with damaged or poorly installed leadwork, you will experience water penetration sooner or later.
The felt underlay being the only barrier between you and whatever weather conditions affect your roof on a daily basis.
Lead is an extremely durable metal and if fitted correctly and in the appropriate grade for the function it will be performing it can provide a maintenance free weather shield for 100 years.
Thicker grades of lead should be used depending on it's overall purpose, ie, frequent foot traffic flat roofs and gutters where extra rigidity is required to resist wind uplift.
As a roofing company we never use lead below grade 4.
Anything less should not be used when bossing or forming lead, as the maximum 25% thinning of bossed lead can easily be exceeded. We are experienced in many applications of leadwork, from straight forward aprons for chimneys, to lead ridge work, all the way through to lead coverings for pitched or flat roof constructions.
All carried out with an emphasis on quality workmanship, and customer satisfaction