One slipped slate may need a small repair, while widespread problems with fixings or supporting battens can call for more work. We look at the slates and the parts beneath and around them before recommending repairs or replacement. Age and appearance alone don't tell us what the roof needs.
We explain slate repairs, replacement and what to expect in a quote. If your home is older, listed or in a conservation area, we'll also highlight why existing materials and roof details deserve careful attention.
Find Out Why the Slates Are Slipping
A slate may slip because it is damaged or because its fixing has failed. We need to check whether it is an isolated problem or part of wider deterioration before discussing the repair with you.
Historic England recommends repairs that suit traditional materials. A few slipped slates do not automatically justify replacing the whole roof. Equally, some reusable slates do not tell us that the battens and other supporting layers are sound. [1]
Ask us to explain what we find: is the problem with the slate, its fixing, the support beneath it or a nearby junction? Those findings are more useful than judging the roof by age alone.
Choosing Slate That Suits Your Roof
Slates vary in size, thickness, source and properties. For a repair, we need a suitable match for the existing roof. For a new covering, we consider the pitch, exposure and surrounding details.
Appearance matters, but the slate also needs to fit and perform properly with the rest of your roof. Ask us which product we propose and why it is suitable.
The origin or label alone doesn't tell you whether a slate is right for your roof. Look at the actual material, its condition and its suitability, whether it is new, imported or reclaimed.
Repair, Partial Renewal or Complete Reroofing?
These are the options we may discuss after inspecting your roof. The right amount of work depends on what we find.
| Possible approach | When it may be worth considering | What to ask us |
|---|---|---|
| Local slate repair | A small area of damage with a sound roof around it | Are the slates and fixings around it sound enough for a compatible repair? |
| Junction repair | Water entry relates to leadwork, a valley, ridge or roof window | Will this repair address the leak, and which slates need lifting? |
| Partial renewal | One part of the roof is in noticeably worse condition than the rest | How will the new section join the existing roof? |
| Lift and relay usable slates | Some slates can be kept, but the layers beneath need work | How much slate might be reused, and how will replacements be priced? |
| Complete replacement | Deterioration or wider project requirements justify it | Why is replacement needed, and which parts of the roof are included? |
On small screens, scroll the table sideways to view every column.
Your quote should explain what stays and what will be replaced. Ask us to clarify the supporting layers and junctions included, as the word 'reroofing' alone does not describe the full job.
Can Your Existing Slates Be Reused?
Sound slates may be suitable for reuse, particularly on a traditional roof. We need to consider their condition, size and compatibility, as well as breakages during removal. The final reusable quantity may only become clear once work begins.
Before starting, agree how extra replacement slates would be selected and priced if fewer can be reused than expected. We should also discuss how old and new slates will look together on visible parts of the roof.
Historic England supports retaining sound traditional materials where appropriate. That still requires a condition check; damaged slates may need replacing, and some may break when lifted. [1]
Check the Leadwork, Valleys and Ridges Too
Your slates may be sound while a chimney flashing or valley lets water in. We check these connections before recommending work to the main covering.
Leadwork needs to suit its position, support and the movement of the roof. Your quote should explain which leadwork needs replacing and what is proposed, so you can compare the work properly. [2]
Ridge work also needs suitable fixings and, where required, ventilation. Dry ridge is one option, and there are mechanically fixed mortar-bedded alternatives. Our ridge-system guide and leadwork guide explain the options in more detail. [3]
What We May Need to Check Beneath the Slates
We cannot see every supporting layer from the outside. If closer inspection or lifting a small area is needed, we will discuss that with you before deciding on the work.
Ask how hidden damage would be recorded, priced and agreed with you. Timber repairs may need structural advice. We also need to plan how your home will be protected while the roof is open.
If insulation is being changed, ventilation and moisture control need checking at the same time. The covering and the layers beneath it need to work together. [4] [5]
Planning and Building-Control Checks
Changing from slate to another material can affect appearance, weight and other requirements. Planning Portal identifies changes in covering weight and structural work among the reasons building-control approval may be needed. How much of the roof is being renewed can matter too. [5]
If your property is listed or affected by local restrictions, get advice before changing the covering or visible details. Newcastle's Article 4 directions apply to specified addresses and types of work, so check your own property's position. [6] [7]
Our Newcastle roofing regulations guide explains the difference between planning and building regulations, and the questions to resolve for your own property.
How to Compare Slate-Roof Quotations
Ask us to set out which roof areas are covered, the new or reused slate proposed, and the work to supporting layers, fixings and junctions. Check access, stripping and disposal, and whether insulation, chimney repairs, roof windows or gutter adjustments are included.
Compare what each quote includes, along with payment stages, weather protection, possible additional work and guarantee terms. Scaffolding or junction repairs can make a substantial difference to the total. Citizens Advice recommends written quotes and clear agreements. [8]
Use our quotation preparation guide before arranging visits. Photographs and repair history help, but do not climb onto the roof to count slates or measure its area.
Caring for a Slate Roof
Keep notes and photographs of changes you can see safely, together with records of past repairs. If you spot slipped slates, blocked drainage or loose material around the chimney, contact us before the problem develops further.
Moss or weathering does not automatically mean the roof needs intensive cleaning or a coating. We need to consider its condition, drainage and any conservation requirements before recommending treatment. [1] [9]
Please keep your own checks to safe positions, such as from the ground. HSE warns that falls and fragile surfaces are risks even during short roof inspections. [10] [11]
We offer slate, tile and pitched roofing and roof repairs in Newcastle, Hexham, Morpeth and the wider service area. Tell us what you have noticed and whether you would like help with a repair, replacement or planned alteration.
Frequently Asked Questions
Does a slipped slate mean the whole roof needs replacing?
No. It may be a damaged slate or failed fixing in one area. We check the cause and the surrounding roof before discussing whether a local repair is enough.
Can existing slates be reused during reroofing?
Sometimes. We need to check their condition and suitability, and allow for breakages when they are lifted. Agree how replacement slates will be selected and priced before the work starts.
Is natural slate always maintenance-free?
No. Even durable slates rely on sound fixings, junctions and drainage. The whole roof needs appropriate care and attention to damage.
Can I change slate to tiles to reduce the price?
It may be possible, but we need to consider the structure, weight, pitch, appearance and permissions. A lower material price does not necessarily make tiles suitable for your roof.
Why can a slate roof leak when the slates look sound?
The leak may come from leadwork, a valley, ridge or roof window. Some defects are also hidden beneath the slates. We need to trace the likely cause before recommending a repair.
Will a repair match the existing roof exactly?
We can discuss the closest suitable match, but age, weathering and availability can affect the appearance. Replacement slates also need to suit the roof's construction.
Do slate roofs in Newcastle need special permission?
Some properties have heritage or address-specific restrictions, while others do not. Check the actual building and proposed work using the relevant local guidance rather than assuming one rule for the whole city.
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.
- Marley Mortar Bedded Security Ridge Kit ↗ A manufacturer's example of mortar bedding used with mechanical fixings. It shows an alternative to a dry ridge system.
- Energy Saving Trust Roof and Loft Insulation Guide ↗ Advice on roof insulation, ventilation and heat loss. The potential improvement depends on your home and the work proposed.
- 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.
- 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.
- Newcastle City Council List of Article 4 Directions ↗ The council's list of Article 4 directions and the types of work they affect. Check the details for your address before deciding whether an application is needed.
- 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.
- 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.