Where lead flat roofs work best
Lead performs best on smaller flat roof areas — extensions, porches, dormers — where the sheet sizes needed to accommodate thermal movement are manageable.
Lead vs modern alternatives
Lead costs more upfront than felt, GRP or EPDM, but its lifespan can be several times longer, making it a genuinely different value proposition over the life of the roof.
Installation considerations
A lead flat roof needs correctly sized bays with rolls to accommodate expansion — getting the bay sizing wrong is the most common cause of premature lead flat roof failure.