Repair your Brighton roof when damage is localised and the surrounding structure is sound; replace it when nail sickness is widespread, tiles are carbonating, or the 10-year repair cost approaches replacement cost. A roof-level survey lifting representative tiles is the only reliable way to decide.
The Honest Answer: It Depends on Three Things
The repair vs replacement decision comes down to three factors assessed together:
- How much of the roof is affected? A single failed flashing or a handful of broken tiles is clearly a repair. Ten leaks in different locations on a 50-year-old concrete tile roof is pointing toward replacement.
- What is the remaining structural life of the roof? A Victorian clay plain tile roof that's 80 years old may still have 20-40 years of life. A 1970s concrete tile roof showing nail sickness and carbonation may have none.
- What is the 10-year cost of each option? Repeated repairs on an end-of-life roof can easily cost more over a decade than a single replacement. A replacement on a roof with significant remaining life is throwing money away early.
Key fact: Concrete interlocking roof tiles have a design life of 30–50 years according to manufacturer guidance from the Concrete Tile Manufacturers Association — meaning much of Brighton's post-war housing stock is now at or beyond replacement age.
When Repair is the Right Answer
Repair makes sense when:
- The problem is localised — a failed flashing, a handful of broken tiles, a single cracked valley, failed ridge pointing in one section
- The rest of the roof is in sound condition — tiles are mechanically sound, battens are dry, felt underlay is intact
- The tile material still has significant life — clay plain tiles at 60-70 years, Welsh slate at 80-90 years, concrete tile at 25-35 years
- The property is in a conservation area where matching materials make repair the appropriate approach for localised issues
A Victorian clay plain tile roof in Hanover, Elm Grove or Preston Park — even one that is 100+ years old — is typically still worth repairing for localised problems. Clay plain tile is extraordinarily long-lived. The issue is usually the mortar, the lead, or a handful of slipped tiles — not the tile material itself. We regularly repair roofs on Brighton terraces that have 30-50 years of remaining tile life.
When Replacement is the Right Answer
Replacement makes sense when:
- Nail sickness is widespread — when more than 20-30% of tiles are no longer mechanically fixed, systematic repair approaches the cost of re-roofing
- Concrete tiles are mechanically failing — carbonation causes tiles to crumble at edges and nibs; once this is widespread, individual tile replacement is uneconomic
- Multiple leaks in different locations — when the felt underlay has failed and water is entering at multiple points, repair is playing whack-a-mole
- Batten rot is widespread — once revealed during strip, widespread batten rot means re-roofing regardless of tile condition
- The 10-year repair cost approaches replacement cost — when we can see the trajectory, we say so honestly
Brighton's Specific Repair vs Replace Scenarios
Inter-War Bungalows: Saltdean, Peacehaven, Lancing
The concrete interlocking tile stock on Brighton's cliff-top and coastal bungalows is now 70-90 years old — significantly older than the equivalent material was ever designed to last. Nail sickness is endemic. Mechanical tile failure is widespread. For most of these properties, the honest answer is that replacement is more cost-effective than repeated repair. We will always say so clearly during survey rather than carry out repairs that aren't the right answer.
Victorian Terraces: Hanover, Preston Park, Elm Grove
Clay plain tile roofs on Brighton's Victorian terraces are generally still worth repairing for localised problems, even at 100+ years old. The tile itself is not the issue — it's the mortar, the lead and occasionally individual slipped tiles or cracked ridge pieces. A thorough repair and a biocide treatment for moss can buy another 20-30 years on a well-maintained Victorian roof. See our roof repairs page for more detail.
1960s-80s Estates: Hollingbury, Moulsecoomb, Burgess Hill
Concrete interlocking tile on these estates is 40-60 years old. It's in the grey zone — not universally at end of life, but surveying for nail sickness is essential before committing to significant repair expenditure. See our Burgess Hill roofing page for more on the specific issues with this stock.
Getting the Assessment Right
An honest repair vs replace assessment requires a roof-level inspection — not just a look from the ground or the loft. We carry out free surveys across Brighton and East Sussex, inspect from roof level, and give you a clear written assessment of both options with realistic cost projections. We don't have a financial incentive to recommend replacement over repair — we make our margin on either. What we do have is a strong incentive to give you the right answer, because that's what generates the word-of-mouth that keeps us busy.
Call 01273 973 996 to arrange a free survey.
Getting the Right Roofer for This Job
The quality difference between roofing contractors in Brighton is significant — not just in price but in knowledge, specification and materials. For any job involving conservation area materials, lime mortar on Victorian properties, code 5 lead in coastal positions, or nail sickness assessment on older concrete tile, you need a roofer with specific experience of Brighton's housing stock.
The right way to assess a roofer for your job: ask specifically about their experience with your property type and the specific work required; ask for references from comparable recent jobs you can call; verify NFRC registration independently at nfrc.co.uk; get a written quote that specifies materials, not just a price.
What to Ask Before You Book
- Have you done this type of work on similar properties in Brighton?
- What mortar specification do you use on Victorian properties? (Answer should be lime)
- What lead code do you specify for this position? (Code 5 for exposed coastal)
- Can you provide references from similar recent jobs?
- Is your NFRC registration current? (Verify at nfrc.co.uk)
- What does the written guarantee cover and for how long?
We carry out free surveys across Brighton and East Sussex. Call 01273 973 996 to arrange.
Frequently Asked Questions
Key indicators for replacement: tiles older than 40-50 years (concrete) or 80+ years (clay/slate) with widespread mechanical failure; nail sickness affecting more than 20-30% of tiles; multiple leaks in different locations; batten rot revealed during inspection. Repair makes sense when the roof has structural life remaining and the problem is localised.
It depends on what 'old' means for the material. Clay plain tiles on a Victorian Brighton terrace can last 80-100 years — a 60-year-old clay tile roof with a localised problem is absolutely worth repairing. A 45-year-old concrete interlocking tile roof showing widespread carbonation is approaching end of life and repeated repairs become uneconomic.
Nail sickness occurs when the wire nails holding tiles to battens corrode and snap. The tiles are then held only by gravity and friction. When nail sickness is localised (a few tiles), individual repair is economic. When it's widespread across the roof, systematic refixing costs approach re-roofing costs and a full replacement often makes more financial sense over a 10-year horizon.
Yes, and it's often required. Conservation areas mandate like-for-like material matching, which makes repair the preferred approach for localised issues. We assess each case and advise on whether matching materials are available and appropriate.
Last reviewed: 21 July 2026 · Brighton Roofing Experts