Expert roofing advice from Nottingham's trusted local roofers. Based on 20+ years of hands-on experience across every housing type in the city.
Lead expands and contracts with temperature. Over decades, thermal cycling causes creep — slow stretching and thinning at stress points. Eventually fatigue cracking. East Midlands range: -10°C to 35°C creates significant movement. South-facing chimneys fail fastest.
Chimney back gutters. Stepped side flashings where chase pointing has cracked. Abutment flashings at extensions. Valley flashings. Bay window lead gutters on Victorian terraces in Sherwood, Mapperley and West Bridgford.
Damp patches near chimneys or extensions. Visible gaps between lead and brickwork. Lead lifted from wall face. Cracks in lead surface. Sealant patches — sign of temporary fix, not proper repair.
Chase new lead 25mm into mortar joints. Wedge with lead wedges, point with lime mortar on period properties. Code 5 for chimney flashings, code 4 for valleys. Sized within LSA maximum dimensions to prevent thermal creep.
Single chimney apron: £180-£350. Full chimney re-flash: £400-£800. Valley replacement: £400-£900. Bay window gutter: £500-£1,200. Wide ranges reflect access, lead code weight and junction complexity.
Sealant over cracked lead lasts 6-18 months. Underlying lead has failed and needs replacing. Continued sealing conceals water damage getting worse. Every sealant patch we remove reveals months of hidden damage.
If this guide has raised questions about your own roof, call 0115 670 1242 for free, honest advice. We have been helping Nottingham homeowners since 2005 and there is very little we have not seen. Your situation is not unusual, and there is almost certainly a practical, affordable solution.
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Last reviewed: 2026-07-20 by Nottingham Roofing Experts
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