Directory of Traditional Building Skills - Mourne Heritage Trust

3 LEADWORK & COPPER ROOFINGLeadwork is still often carried out by a plumber, recalling the origin of the trade. Lead is anextremely durable and flexible material but it does demand expertise. Good detailing andpractice are essential to ensure excessive thermal movement does not open joints, sag flashingsor stretch large flat sheets so that they split open.Old buildings sometimes have complex roof structures with hidden gutters and valleys. Leaksare sources of problems which may be out of sight, while slow leaks saturate roof timbers andmay lead to dry rot.Valleys and valley gutters should be broad, laid to good falls and easily cleaned. Overflowsshould be positioned in prominent locations to warn of gutter blockages; regular maintenanceis essential. In important buildings moisture sensitive alarms can be installed underneathhidden valleys to warn of damp penetration. Flashings on chimneys, parapets, abutments etc.all require well detailed lead of appropriate thickness, size and design.The Lead Sheet Association publishes details of good practice, carries out research and offersan advice service. The Lead Contractors Association publishes a directory of specialistleadworking contractors.These publications can be obtained from:The Lead Contractors AssociationCenturion House38 London RoadEast GrinsteadWest SussexEngland RH19 1ABTel: 01342 317888Fax: 01342 303200lca@lca.gb.comwww.lca.gb.comThe Lead Sheet AssociationHawkwell Business CentreMaidstone RoadPemburyTunbridge WellsKent TN2 4AHTel: 01892 822773leadsa@globalnet.co.ukwww.leadsheetassociation.org.ukCopper roofing is the traditional material for domes and cupolas, and correct installation is askilled trade. It is a versatile and very attractive material, and can now be supplied inprepatinated form to avoid the problems associated with unsightly weathering in the earlyyears.See also Appendix 1: Further reading – p. 14982