Is my roof too old? Age versus condition

Cost guides and manufacturers give lifespans as ranges, and they do not always agree. Use them as typical figures, never as a promise.

The sources differ on tiles. Marley cites a minimum life expectancy of 60 years for clay, taken from the BRE, while the Building Conservation Directory argues that a figure like that is a poor guide, given how many roofs from centuries ago survive. A manufacturer guarantee is a different thing again, and never a lifespan.

For flat roofs the spread is wide. EPDM is quoted anywhere from 20 to 30 years up to 50 years or more depending on the source, and GRP at 25 to 40 years. That spread is another reason to treat a published number as a starting point for a conversation, never a date by which a decision is forced.

Two roofs of the same age and covering can be in very different states. One faces a sheltered garden and has had its moss cleared and a slipped tile replaced every few years. The other has open aspect, blocked gutters and a loft that never dried out.

Workmanship counts as much. A roof laid with short laps, nails in the wrong place or ridge tiles on mortar alone can fail early. A well laid one can outlive its stated range by decades.

It follows that a roof does not suddenly expire at its quoted age. It declines as its weakest parts give out, and those parts are usually the fixings, underlay and battens, not the visible covering. Our explainer on signs your Stroud roof needs replacing, not repairing shows what to look for, and it matters more than the date the roof was laid.

Local conditions matter too. A roof under trees collects leaves and stays damp, a south-facing slope bakes and dries, and a valley roof with a long run of gutter handles far more water than a short one. We note those factors on survey because they shift where on the range your roof is likely to sit.

The visit covers the outside of the covering and the underside from the loft. We note slipped, cracked or delaminating pieces, the ridge and verges, lead at chimneys and abutments, gutters and the underlay. Up in the loft we look for chinks of daylight, damp batten ends, stained rafters and signs of condensation.

A roof of 40 years in good order can often be repaired for a modest sum. MyBuilder's 2026 roof repair guide puts minor repairs at £100 to £300 and moderate ones at £500 to £1,000. A roof half that age with wet battens and perished underlay may need a full strip. The difference is down to condition, which is why a survey comes before any recommendation.

You receive pictures of your own roof with the survey, which lets you check our findings against a second opinion. That matters when a decision costs thousands of pounds.

Ask whoever inspects the roof to explain what they saw in plain terms, and to show the evidence. A recommendation without pictures is a guess.

Age becomes a stronger signal near the top of a covering's range, especially where there has been no maintenance and the original felt and fixings are still in place. Underlay from decades ago may have hardened and cracked, and some older roofs have none.

Repair costs also matter. Once repairs become frequent, patching can cost more across a few years than a new covering would, and the next owner will notice. If you plan to sell, a survey and photographs can help a buyer see the roof's condition. Many owners do better with a planned replacement than a rushed one, so it is worth knowing what planning permission for a re-roof involves before you commit.

If you want to stay in the house while the work goes on, our answer on staying put during a re-roof explains what that is like, and the sensible time of year to plan it.

There is one more age-related trap: re-covering over an old structure. A new covering hung on 60-year-old battens is only as good as those battens, so the decision is rarely about the covering alone.

Ask three things. What does the loft show? What does each slope look like? How often have repairs been needed in the last few years? If the answers are good, a maintained roof of any age can stay up. If they are poor, a planned replacement beats a run of repairs.

When we replace a roof, the quote after survey covers each stage, and older roofs are covered in the same material they had before. Finished work carries a ten-year guarantee on workmanship, given in writing. The roof replacement page is the place to begin, and a few photographs of your roof are enough to get a survey moving.

Keep any survey report and photographs with the house papers. They give you a baseline to compare against in a few years, and they help the next owner understand what was done.