Valley Repair Bishop's Waltham

Lead valley re-dressing in Bishop's Waltham: £150–£350. Full lead valley replacement: £450–£900 depending on length. Mortar valley repair: £200–£450. Free survey and written quote — call 01962 809171.

Valley failure in Bishop's Waltham typically presents as interior damp on the ceiling 1–3 metres from the actual valley position. The water tracks horizontally after entering at the valley. If you have a damp patch that does not appear to be directly below a chimney or tile, a valley survey is the correct first step.

Bishop's Waltham's Victorian and 1960s mixed housing typically has lead-lined valleys on Victorian and 1930s properties. We confirm the valley type and specification at survey.

The primary causes in Bishop's Waltham are age (original Victorian and 1930s lead is now 80–100 years old), underweight lead from previous repairs (code 3 or 4 where code 5 is required), and silicone patch repairs that delay rather than resolve failure.

For re-dressing existing sound lead, yes — the surrounding tiles may not need lifting. For full valley replacement, the cut tiles on both sides must be lifted and relaid. We minimise disturbance to surrounding tile work on all Bishop's Waltham valley repairs.

Code 5 (2.24mm, 25kg/m²) as the BS 6915 minimum for valley linings. We never install code 3 or 4 lead in a valley position. The cost difference is marginal; the lifespan difference is 20–30 years.

Correctly specified code 5 lead valley with correct thermal movement allowance: 60–80 years. This is the expected lifespan on a Bishop's Waltham property where installation follows BS 6915 and Lead Sheet Association guidance.

Yes — valley outlet clearing is part of every valley survey and repair visit. Blocked valley outlets cause water to back up and overflow at the valley foot, accelerating failure. This is included in the survey, not an additional charge.

Yes — mortar valleys on post-war Bishop's Waltham properties are often converted to lead on re-roofing. This adds £200–£400 to the valley cost but eliminates the mortar cracking that causes mortar valley failure. We include both options in re-roof quotes where mortar valleys are present.

An active valley leak causing ceiling damage should be assessed within 24–48 hours. Call 01962 809171 to book an emergency survey. We cover all of Bishop's Waltham and can typically attend same-day or next-morning for active leaks.