Leaks around chimneys, dormers, bay windows, and valleys are almost always a leadwork failure. We cut, dress, and fix new lead flashings to the correct code thickness using traditional methods that last for decades. Poor leadwork is one of the most common causes of hidden roof leaks in Dereham's older housing stock.
Image: Dereham lead work
Leadwork is the watertight seal between your roof covering and any vertical surface — chimneys, dormer cheeks, parapet walls, valley gutters, and abutments. When it fails, water finds its way into the roof structure silently, often for months before a damp patch appears on a ceiling. We carry out leadwork repairs and full replacements across Dereham and mid-Norfolk, covering everything from a single chimney flashing to a full valley reline on a Victorian villa.
All lead is cut and dressed on site from BS EN 12588-certified sheet lead in the correct code for the application — code 4 for soakers and small flashings, code 5 for stepped and cover flashings, and code 6 or above for valley gutters and parapet details. We fix into properly cut mortar joints rather than simply surface-pointing over old lead, which is a temporary repair at best. Each section is clipped at the correct centres to allow for thermal movement, which prevents the rippling and cracking that causes premature failure in lead that has been over-fixed.
Leadwork is a skilled trade that takes years to do well. Poorly fitted lead that hasn't been properly dressed or clipped will lift, crack, or work loose within a few years. Attempting to patch failing lead with mastic or roof sealant is almost always a short-term fix that masks the problem rather than solving it.
We survey the affected area before quoting, identify any associated tile or structural damage, and give you a clear written price. Most leadwork repairs are completed within a day. Full valley replacements or complex chimney details may take two days on a larger property.
Leadwork repairs in Dereham typically cost between £250 and £600 for a standard chimney flashing replacement, rising to £800–£1,800 or more for a full lead valley on a period property, depending on length and access.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge — we aim to be on-site within 24 hours.
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