Specialist Lead Work & Flashing Services

Lead work costs depend on the project scope. Chimney flashing replacement typically ranges from £400-£800, valley gutter renewal from £500-£1,200, and full box gutter replacement from £1,000-£3,000+. Lead prices fluctuate with commodity markets. We use Code 4 and Code 5 lead as standard, which balances cost with durability for Mid Sussex properties.

Yes – lead is fully legal and remains the preferred material for flashings, valleys, and box gutters on UK roofs. Modern regulations require lead to be installed correctly to prevent water contamination, which is exactly what our trained specialists do. We follow all HSE guidelines and Control of Lead at Work (CLAW) regulations.

Properly installed lead flashing can last 60-100+ years. Lead is one of the most durable roofing materials available. It naturally develops a protective patina over time and resists corrosion. The key is correct installation – using the right code (thickness) of lead for the application and proper jointing techniques.

The code refers to the weight and thickness of the lead sheet. Code 4 (20kg/m²) is suitable for most flashings, soakers, and standard valleys. Code 5 (25kg/m²) is thicker and used for box gutters, large valleys, and flat roof details. We always specify the appropriate code for each application to ensure longevity and compliance with British Standards.

Ideally, lead work is best carried out in dry conditions. However, experienced lead workers can work in light rain if essential for emergency repairs. Lead is malleable and weather-resistant during installation. We schedule lead work for suitable weather windows wherever possible and use temporary coverings if rain threatens mid-project.

Lead flashing typically fails due to incorrect installation rather than material failure. Common causes include: lead bays that are too long (causing thermal cracking), incorrect fixing that prevents expansion, poor jointing, or damage from other trades. We strip out failed leadwork and replace it with correctly sized and fitted lead to British Standard BS 6915.