
Service
Bay Window Roof Repair (Lead & Tile)
Bay window roofs are tiny, traditional, and almost always badly fixed last time. Lead bays on 1930s semis are the classic — we still do them properly in Code 5 lead, not flashband and silicone.

- Code 5 lead bay re-cover
- Tile bay canopy renewal
- Wood roll & welted seam detail
- Apron flashing into house wall
- Rotten timber sub-deck replacement
- From £450 for repairs, £1,200+ for full re-lead
Why bay roofs leak (it's almost never the lead)
Original 1930s bay leads last 80+ years. When they finally leak it's usually the apron flashing into the house wall above, the rolls splitting from foot traffic, or — most often — someone's previous 'repair' with flashband that's lifted. The lead itself is normally salvageable.
Doing it the right way
Code 5 lead, wood rolls (not welted seams on anything over 1.5m), Code 4 apron up the house wall chased 25mm into a brick course, pointed in lime mortar on period property. The whole job on a typical 1930s bay is one day for two people.
FAQs
Can you patch the existing lead?+
Sometimes — lead patches are bonded, not just laid on top. If the original sheet is fundamentally sound a £450–£700 repair is realistic. If it's been previously botched it's usually false economy.
Do you match the original detail?+
Yes — wood rolls, welted seams, traditional apron detail. Listed and conservation properties get exactly what the original spec called for.
Need Roofing Work You Can Rely On?
Speak with Butler Bespoke Roofing for honest advice, a free site visit and a clear, written quote anywhere across Buckinghamshire.
