HomeServices Areas We Cover AboutOur WorkReviewsBlogContact07427 846158or 07843 741505 Get a Free Quote - Home - Services - Chimney Work Chimney Specialists # Expert Chimney RepairsThat Stop Leaksat the Source Chimneys are one of the most common sources of roof leaks. Whether your chimney needs repointing, new flashing, or structural repairs, we resolve the problem permanently — guaranteed. Book a Free Chimney Inspection 07427 846158 ★ Lead flashing specialists · Fully insured · Free inspections · Work guaranteed 10+ Years Experience Fully Insured Free Inspections Work Guaranteed All Chimney Types Service Overview ## Complete Chimney Repair Services Your chimney stack sits at the highest point of your roof, fully exposed to wind, rain, frost, and temperature extremes. This constant exposure makes chimneys one of the most common sources of roof leaks across County Durham. Cracked rendering, deteriorating mortar joints, failed lead flashing, loose chimney pots, and damaged flaunching (the cement seal around the pot) are all regular problems we resolve. Weather Shield Roofing carries out all types of chimney repair work, from minor repointing and reflaunching to complete chimney stack rebuilds. We work on active chimneys (still connected to working fireplaces or boilers), redundant chimneys, and chimney stacks that have been capped or sealed. Chimney problems often present as mysterious damp patches on internal walls and ceilings — sometimes appearing far from the chimney itself. Water enters through failed mortar, rendering, or flashing, then tracks along roof timbers and masonry before emerging as a stain elsewhere. Accurate diagnosis is essential, and our experience means we trace leaks to their actual source — not just the visible symptom. We serve properties across Durham, Bowburn, Lanchester, and all areas of County Durham. Every chimney inspection is free, and we provide honest advice on whether repair or more extensive work is needed. Why It Matters ## Why Chimney Issues Demand Prompt Attention Chimney problems escalate faster than most other roofing issues because of the chimney's extreme exposure. Sitting above the ridge line, your chimney catches the full force of every storm, temperature swing, and rain event. In County Durham, that means relentless weathering for decades. Failed lead flashing — the waterproof seal between your chimney and the surrounding roof — is the single most common cause of chimney-related leaks. When lead flashing lifts, cracks, or loses its mortar pointing, water runs directly down the face of the chimney and into the roof structure. This water damages roof timbers, soaks insulation, stains ceilings, and promotes mould growth. Deteriorating mortar joints between the bricks of your chimney stack allow rain to penetrate the masonry. Frost then freezes the trapped moisture, expanding and cracking the brickwork further in a process called frost-spalling. Left untreated, this can compromise the structural integrity of the entire chimney stack, creating a genuine safety risk in high winds. Damaged flaunching — the cement cap around the chimney pot — allows water to enter from above. Loose pots become dangerous in storms. And cracked or blown rendering exposes the underlying brickwork to moisture that it was never designed to absorb. Each of these issues is straightforward to repair when caught early, but expensive and disruptive when neglected. How We Work ## Our Chimney Repair Process 1 ### Free Chimney Inspection We inspect the chimney stack, flashing, mortar joints, rendering, flaunching, and pots. We photograph all issues and explain our findings clearly. 2 ### Diagnosis & Quote We identify the source of any leaks or damage and provide a detailed written quote for the repair work. No obligation, no pressure. 3 ### Access & Safety Setup Scaffolding or roof access equipment is arranged as needed. Safety is paramount when working at chimney height. 4 ### Repair & Restoration We carry out the agreed work — whether that's repointing, reflaunching, lead flashing replacement, rendering, or a full stack rebuild. All materials are selected for longevity. 5 ### Weatherproof Test & Guarantee The repair is checked for watertight integrity. You receive a written guarantee covering workmanship and materials. Your Advantages ## Why Trust Us With Your Chimney ### All Chimney Types Active flues, redundant stacks, capped chimneys — we handle every type with the appropriate methods and materials. ### Leak Tracing Expertise We trace chimney leaks to their actual source, not just the visible symptom. Accurate diagnosis means the right repair, first time. ### Lead Flashing Specialists Properly dressed and pointed lead flashing is the gold standard for chimney waterproofing. We install to industry-leading standards. ### Cost-Effective Repairs Catching chimney problems early saves hundreds compared to letting damage spread to timbers, ceilings, and internal walls. ### Structural Assessments If your chimney stack shows signs of structural movement, leaning, or cracking, we assess the severity and recommend the right course of action. ### Guaranteed Workmanship Every chimney repair comes with a written guarantee. We stand behind our work — your chimney, your peace of mind. In-Depth Guide ## Chimney Repair Types & Technical Detail ### Lead Flashing Replacement Lead flashing creates a watertight seal between the chimney stack and the surrounding roof covering. We use code 4 or code 5 milled lead sheet, cut and dressed on-site to fit the exact profile of your chimney. Step flashings, back gutters, and apron flashings are formed and pointed into chased mortar joints using appropriate sealants. Properly installed lead flashing lasts 50+ years. ### Chimney Repointing Repointing is the process of removing deteriorated mortar from the joints between bricks and replacing it with fresh mortar. On chimney stacks, we use a lime-based or NHL (Natural Hydraulic Lime) mortar that allows the masonry to breathe while maintaining weather resistance. Portland cement mortars — too rigid for exposed chimneys — are avoided unless specifically appropriate to the construction. ### Reflaunching Flaunching is the cement bedding around the base of chimney pots. It sheds water away from the pot and prevents rain entering the flue. Over time, flaunching cracks and separates from the pot. We remove old flaunching, rebed the pot securely, and apply fresh mortar shaped to direct water off the stack. ### Chimney Pot Replacement Damaged, loose, or missing chimney pots are replaced with appropriate new or reclaimed pots matched to the style of your property. For redundant flues, we fit ventilated caps that allow airflow while preventing rain entry — maintaining the chimney's ventilation function without exposure to water. ### Chimney Rendering Many chimney stacks across County Durham are rendered (coated with cement or lime render). Cracked, blown, or spalling render allows moisture to penetrate the underlying masonry. We strip failed render, prepare the surface, and apply new breathable render in an appropriate finish to match the existing. ### Chimney Stack Rebuilds In severe cases — particularly where frost damage, structural movement, or decades of neglect have compromised the brickwork — a partial or full chimney stack rebuild is necessary. We dismantle the damaged section course by course, rebuilding with matching bricks and lime mortar. Rebuilt stacks are fitted with new flashing, flaunching, and pots as part of the project. Common Questions ## Frequently Asked Questions ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">How much does chimney repair cost in County Durham? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">How do I know if my chimney needs repair? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Can you repair a chimney that's no longer in use? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Do you use lead or lead alternatives for flashing? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Will chimney repairs stop the damp patch on my ceiling? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">How long do chimney repairs take? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Is scaffolding always needed for chimney work? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Can you match the bricks if a rebuild is needed? ### Related Services - Roofing Services - Roof Replacements - Roof Repairs - Flat Roofs - Gutters - Fascias - Soffits - Repointing - Roof Cleaning - Gutter Cleaning - Drone Roof Surveys ### Areas We Cover - Chimney Work in Durham - Chimney Work in Houghton le Spring - Chimney Work in Chester-le-Street - Chimney Work in Bowburn - Chimney Work in Spennymoor - Chimney Work in Ferryhill - Chimney Work in Peterlee - Chimney Work in Coxhoe - Chimney Work in Lanchester - Chimney Work in Newton Aycliffe - Chimney Work in Bishop Auckland - Chimney Work in Sedgefield - Chimney Work in Shildon - Chimney Work in Tudhoe - Chimney Work in Coundon - Chimney Work in Leeholme - Chimney Work in Cornforth - Chimney Work in Chilton - Chimney Work in Trimdon - Chimney Work in Fishburn ## Ready to Protect Your Property? Get a free, no-obligation estimate. We'll inspect your roof, explain exactly what's needed, and give you a clear price — before any work begins. Get Your Free Estimate 07427 846158 Or call 07843 741505 Most enquiries answered within hours · Free estimates · No hidden costs Trusted roofing contractor serving County Durham and surrounding areas. Over 10 years of experience delivering quality workmanship. ### Our Services - Roofing Services County Durham - Roof Replacements - Roof Repairs County Durham - Flat Roof Installation - Gutter Repair & Replacement - Fascia Board Installation - Soffit Replacement - Chimney Repair - Brick Repointing - Roof Cleaning County Durham - Gutter Cleaning County Durham ### Roofers Near You - Roofers in Durham - Roofers in Houghton le Spring - Roofers in Chester-le-Street - Roofers in Bowburn - Roofers in Spennymoor - Roofers in Ferryhill - Roofers in Peterlee - Roofers in Coxhoe - Roofers in Lanchester - Roofers in Newton Aycliffe - Roofers in Bishop Auckland - Roofers in Sedgefield - Roofers in Shildon - Roofers in Tudhoe - Roofers in Coundon - Roofers in Leeholme - Roofers in Cornforth - Roofers in Chilton - Roofers in Trimdon - Roofers in Fishburn ### Contact Us - 07427 846158 - 07843 741505 - info@weathershieldroofer.co.uk - 65 Mason Gdns, Chilton, Ferryhill, DL17 0DY - Opening Hours24 Hr Line Open — Monday to Sunday © 2026 Weather Shield Roofing. 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