Age, granules in the gutter, daylight in the loft — which warning signs genuinely mean replacement, and which ones roofers use to sell you one you don't need.
Roof replacement is one of the biggest bills a homeowner faces, and the decision carries real money in both directions. Here's what genuinely points to a roof at the end of its life — and what doesn't, despite the fact that it's often used to argue for one.
The Signs That Actually Matter
- Tiles losing their surface across a whole elevation — not one patch, but the majority of a slope
- The felt or membrane has perished — visible in the loft as a crumbly or disintegrating barrier
- Repeated leaks in multiple locations that keep coming back after repair
- Sagging along the roof line, which suggests the structure rather than the covering
- Battens that are rotten or have lost their grip when you check from the loft
- Age well past expected life — 50+ for concrete, 100+ for clay or slate, with the condition to match
- Daylight visible through the roof covering in the loft on a bright day
- Slipped tiles recurring in the same area after being re-fixed
- The whole terrace is being re-roofed because it was built together
- An insurer has declined to cover the roof because of its condition
The Signs That Don't
- Moss — cosmetic most of the time, fixable with a clean
- A single slipped tile — a repair, done properly
- Granules in the gutter — a sign the tiles are ageing, not necessarily that the roof is finished. Some granule shedding is normal throughout life
- A damp patch with an identifiable source — that's a repair, whichever source it is
- One leak that's been fixed properly — a repair that works doesn't imply the roof is done
The Question To Ask
Ask anyone quoting for a replacement: what happens to this roof if I do nothing for five years? A good answer describes specific risks — interior damage, structural rot, further leaks. A bad answer is "it'll get worse", or an assumption that age alone means replacement.
Our Position
Plenty of roofs we survey have years left, and we say so. If the honest answer is that a repair will do, that's what we'll quote. If it genuinely needs replacing, we'll show you why — photographs of the faults, not a sales pitch.
Want This Looked At Properly?
Free survey, photographs, and a fixed written price. No obligation and no sales pressure.
Costs and timings in this article are guides for Medway and Kent properties. Every roof is different — a survey is the only way to get an accurate figure.