Flashing helps keep rain out where your roof meets a chimney, wall or another roof section. Even sound tiles or slates can leak at a damaged joint. We check the connection and surrounding roof before discussing whether a flashing repair, replacement or other work is needed.
We explain what flashing does, why it may leak and what to look for in a repair quote. Leadwork and roof access need suitable skills and precautions; leave cutting, handling and installation to trained professionals.
What Flashing Is Designed to Do
Flashing directs rainwater away from the join between your roof and the adjoining wall or chimney. It needs to work with those materials and allow for movement.
The arrangement depends on the roof covering, pitch and surrounding construction. A stepped join beside a slate roof needs different details from a raised edge on a flat roof. We consider the junction you have before discussing repairs.
Historic England explains why traditional roof junctions need suitable maintenance and repair. Lead manufacturers also specify different materials for different uses, so the product needs to suit the job. [1] [2]
Where Flashing Is Used Around Your Roof
These are the junctions you may want to discuss with us. The exact repair and materials need to be chosen after the affected area has been assessed.
| Roof area | What We May Need to Check | Useful question for the quote |
|---|---|---|
| Chimney junction | Flashing, surrounding covering, masonry and relevant flue-area symptoms | Which part is leaking, and could more than one area be involved? |
| Where a roof meets a wall | The wall, roof covering, supports and waterproof connection | Which junction components will be repaired or renewed? |
| Valley or concealed gutter | Water route, support, movement and adjacent covering | Does the drainage or base beneath it also need work? |
| Around a roof window | Manufacturer's flashing system and connections | Does the window need its manufacturer's flashing kit? |
| Raised edges on a flat roof | The covering, wall connection and available height | Does the repair suit the existing flat-roof system? |
| Pipes and other roof openings | The purpose, movement and surrounding material | Which fittings and materials suit this opening? |
On small screens, scroll the table sideways to view every column.
We'll identify the junction and parts included in your quote. “Renew lead” alone doesn't explain enough to compare the work.
Why Leadwork Can Develop Problems
Lead may split, move or separate from nearby materials. We look at the supports, fixings, movement and surrounding roof to understand why it's happened.
A surface patch may leave a problem beneath it unresolved. Lead can be durable, but the design and fitting still matter. A long product-life claim doesn't mean every installed junction needs no maintenance or can't suffer storm damage. [2]
Tell us when the leak appears and whether it follows heavy rain, wind from one direction or prolonged wet weather. Those clues help us decide what to check.
A Chimney Leak May Have More Than One Source
Flashing may be responsible for a chimney leak, but brickwork, mortar, the top of the stack or moisture in the flue can also contribute. We need to consider the surrounding areas too.
Historic England's July 2026 damp guidance explains the limits of moisture readings in older buildings. A damp mark or meter reading alone won't prove that replacing the lead will solve it. [3]
Our external roofing work doesn't certify an appliance or flue as safe. HETAS explains the separate roles of servicing, sweeping and carbon-monoxide precautions. Arrange those checks with the relevant qualified specialist. [4] Our chimney-leak guide explains what to tell us before a visit.
Repair or Replace the Flashing?
A local repair may be enough if the surrounding flashing and roof are sound. Replacement may be more sensible where damage is extensive or the junction needs changing as part of other roof work.
Ask us what can stay, whether nearby tiles or slates need lifting and how any hidden damage would be handled. We'll explain why the proposed amount of work makes sense.
If a surface treatment is proposed, ask whether it's temporary and what it can achieve. It isn't automatically equivalent to rebuilding a damaged junction, particularly where the cause remains uncertain.
Choose Materials That Suit Your Roof
Lead comes in different thicknesses and specifications, as Midland Lead's product information shows. The material needs to suit the particular flashing, valley or other detail; one code won't be right everywhere. [2]
The fitting method and nearby materials matter too. A roof window may need a dedicated flashing kit. VELUX's guidance, for example, distinguishes kits by window size, roof covering and pitch. [5]
Ask which product and workmanship guarantees apply, including exclusions and maintenance conditions. A material's advertised lifespan doesn't guarantee every part of the finished roof.
Access Can Be a Significant Part of a Small Repair
Even a short piece of flashing may need scaffolding if it's beside a tall chimney or above a conservatory. Access and protection can therefore affect the price more than the length of lead.
HSE states that roof work requires competent planning and precautions even where the task takes only a few minutes. Do not access the roof to measure the lead, pull at a joint or test its attachment. [6] [7]
Tell us the building height and anything that makes access difficult. Safe photos help us prepare, but we'll still need to consider how the work can be reached safely.
Heritage and Approval Considerations
Traditional roof details may contribute to a building's character. At a listed building or a property with relevant local restrictions, the proposed change should be checked before original material or details are removed. [1] [8]
Newcastle's Article 4 directions affect particular properties and types of work. Check your address and the proposed change before assuming a repair needs permission or is unrestricted. [9]
If the leadwork is part of a larger roof renovation or structural change, building-control requirements may also apply. Consider the whole project when checking approvals. [10]
What a Clear Leadwork Quotation Includes
Your quote should identify the junction, repair or replacement, materials, access and any lifting and refitting of nearby coverings. We'll also explain exclusions and how concealed damage would be discussed before extra work is approved.
If several possible causes remain, further checks may be needed before a repair can be quoted firmly. We'll explain that rather than assume sealing every visible joint will resolve it.
Citizens Advice recommends written quotes and clear work and payment agreements. Our roofing quote guide helps you compare what's actually included. [11]
Maintenance and Follow-Up
Keep the invoice, photos and product or guarantee details. If staining or movement returns, tell us where it is and what the weather was doing. Please observe only from safe positions.
Nearby drainage also matters. Debris in a valley or gutter can change where water flows, so we consider it alongside the flashing. [12]
We offer leadwork and flashing repairs, chimney roofing and roof repairs in Newcastle, Gateshead, Tynemouth and across the North East. Tell us where you've noticed the problem; you don't need to know whether new lead is the answer before contacting us.
Frequently Asked Questions
Can damaged flashing cause a leak when the tiles are sound?
Yes. The main tiles or slates may be sound while water enters at a wall, chimney or another junction. We'll consider the connection and nearby roof together.
Does every chimney leak need new leadwork?
No. The brickwork, mortar, top of the chimney or another moisture source may be involved. We need to check the cause before recommending leadwork.
Is sealant a permanent alternative to replacing flashing?
Not necessarily. A local treatment may be useful for a particular fault or as temporary work, but it won't resolve every damaged junction. Ask us what it covers and what follow-up is needed.
Which code of lead should be used?
It depends on the job and the detail being formed. The material should be selected by the designer or competent installer for that use, rather than applying one code to every roof junction.
Why can a small flashing repair cost more than expected?
Access, protection and lifting nearby coverings may involve more work than the short length of lead suggests. Check the complete quote, including the condition of the junction.
Can I inspect the flashing myself?
Keep observations to safe ground-level or otherwise safely accessible positions. Do not climb onto the roof, pull at lead or disturb a junction to test it. Roof-work risks apply to inspections as well as repairs.
Does leadwork repair make a working chimney safe to use?
No. Weatherproofing the exterior does not certify the appliance or flue. Obtain the appropriate qualified inspection, servicing or sweeping for those separate safety matters.
References & Sources
We have linked to the sources used in this guide so you can read more. They were checked on 27 September 2026. Manufacturer guidance applies to its own products, and published prices are examples rather than our quotes. Check the requirements for your project before arranging work. Links open in a new tab.
- Historic England Maintaining and Repairing Roofs ↗ Advice on traditional roof coverings, fixings and repairs. It explains why the condition of the whole roof matters when considering whether slates can be retained.
- Midland Lead Lead Sheet: Product Information ↗ Product information about lead sheet and its different thicknesses. Ask which specification suits the junction being repaired on your roof.
- Historic England Assessing Damp in Historic Buildings ↗ Published on 13 July 2026, this guidance explains how damp is investigated and why some findings need further checks. It is particularly useful for older masonry and recurring chimney stains.
- HETAS Carbon Monoxide Guidance ↗ Advice on appliance servicing, chimney sweeping and carbon monoxide alarms. Roofing repairs alone cannot confirm that your appliance or flue is safe.
- VELUX VELUX Roof Window Flashings ↗ Information on matching the window and flashing to the roof's pitch and covering. Check the exact combination proposed for your installation.
- Health and Safety Executive Construction: Roof Work ↗ HSE advice on safe access and protection during roof work. Keep your own observations to safe positions, such as from the ground, and leave roof access to professionals.
- Health and Safety Executive Fragile Surfaces ↗ HSE explains why roofs and rooflights may be fragile, and why precautions are needed even for a short maintenance job.
- Planning Portal Roof: Planning Permission and Building Regulations ↗ Planning guidance for roof work in England. The requirements depend on your property, the changes proposed and any restrictions at your address.
- Newcastle City Council Article 4 Directions ↗ Local restrictions can remove certain permitted development rights. Check the direction and map for your own address before planning changes.
- Planning Portal Building Regulations: Work to an Existing Roof ↗ Guidance for England on building-control applications, including roof area, structural changes, fire performance and covering weight. Check how it applies to your proposed work.
- Citizens Advice Before You Get Work Done on Your Home ↗ Citizens Advice guidance for England on choosing a trader, getting written quotes, checking insurance and agreeing permissions.
- Historic England Inspection, Maintenance and Repair of Rainwater Systems ↗ Advice on inspecting and maintaining gutters, downpipes and outlets, including considerations for historic buildings.