The short answer
Almost nothing on a pitched roof is safe for a homeowner to repair from a ladder or by walking on the tiles. What you can do safely is look: check from the ground with binoculars, inspect the loft with a torch, clear a hatch of clutter and keep records. Any task that has you leaving the ground or stepping onto the roof belongs with a trained roofer who has proper access.
Why roofs are the wrong place to practise
A roof looks forgiving from below. Up close it is steep, slippery in damp weather, and made of materials that crack under a foot. Slates snap, concrete tiles shift, and moss turns every surface to glass. The edge is unprotected, the ground is a long way down, and a ladder leaned against a gutter can crush it or slide sideways. A hand on a loose tile is the wrong thing to be holding when the tile moves.
Professional roofers work from scaffold, towers, crawling boards and harnesses for a reason. Even they treat falls as the main hazard of the trade, and they still plan every ascent. Added to that, any repair attempted by someone unsure of how a roof sheds water is likely to trap it, and trapped water rots timber. The job you save today can turn into a larger one next winter.
Safe things you can do yourself
Plenty of useful work needs nothing more than the garden path or the loft joists under your feet.
- Look from the garden. A pair of binoculars shows slipped tiles, gaps at the ridge, cracked flashing and moss build-up without anyone leaving the ground.
- Check the loft. On a dry day, use a torch to look for stained timber, wet insulation, daylight and drips. Step only on the joists or on boards laid across them, never on the ceiling between.
- Photograph and date everything. Pictures of stains and any active leak help a roofer diagnose faster.
- Clear the clutter. Free access to the loft hatch and eaves saves time at a survey.
- Contain the water. A bucket, a towel and a plastic sheet over furniture limit the damage while you wait.
Our page on finding a roof leak sets out a sensible order for these checks.
Jobs that look easy and are not
Several well-known quick fixes cause more trouble than they cure. Smearing mastic or roofing sealant over a crack hides it for a season and makes later lead work harder, because new metal will not bond to old sealant. Spreading cement along a wall joint cracks as the roof moves. Fixing a loose tile with adhesive can lock it where it should shed water. Spraying foam under the covering conceals the real fault and can trap moisture; the Energy Saving Trust (updated May 2026) advises against foaming the underside of a roof as a way round repairing the covering.
Roof coatings and liquid membranes sold in tubs are another trap. Applied to a damp or dirty surface they peel, and applied over a bad joint they seal in the water. A blocked valley or gutter looks like a quick sweep, yet it puts you at the roof edge or on a ladder leaning on plastic guttering, which is how many falls start. See our page on what damages roofs for the usual causes behind these faults.
Special cases: asbestos, old coverings and flat roofs
Some jobs tempt people onto roofs they know nothing about. If a garage, shed or older outbuilding has corrugated cement sheet, treat it with caution. The HSE says that if a building dates from before 2000, or was refurbished before then, you should assume it contains asbestos. Breaking, drilling or scrubbing such sheets can release fibres, so leave them alone and ask for advice before touching them. Under HSE rules, handling undamaged asbestos cement carefully counts as non-licensed work for trained people, and broken material brings stricter duties.
Flat roofs need care too. Walking on an old felt or GRP roof can crack it, and pulling at a lifted edge can tear the membrane. Fragile roof lights and conservatory panels will not carry a person. If you cannot tell what a roof is made of, that alone is a reason to wait for someone who can.
Weighing up the cost of a repair against a mistake
A small professional repair is not always large money. MyBuilder's roof repair guide, updated in August 2026, puts minor repairs at £100 to £300 and moderate ones at £500 to £1,000, with major repairs at £2,500 or more. Those are typical national figures. A fall, a damaged flashing or a wet ceiling can cost much more than any of them, and the roofer then has to undo the first attempt as well as do the proper repair.
Scaffolding is the cost people avoid most, and it is also the item that makes a roof job safe. MyBuilder's scaffolding guide gives £850 to £1,200 for a standard two-storey house. When you compare quotes, ask whether VAT and scaffold are in them, so the figures stand for the same thing. Our page on whether a repair is worth it helps you weigh the choices.
What happens when you call us
Describe what you have noticed and we book a survey, with any live leak made safe first. We go over the covering, flashings, valleys, gutters and loft, and our written quote arrives illustrated with shots of your particular slopes. It proposes the smallest job that does the work properly, and at the end we sweep up and carry the debris off site.
How long a repair takes depends on the fault, a topic covered in how long a roof repair takes. Repairs fall under our roof repairs service and carry a 10-year workmanship guarantee in writing. The number is 01793 626096, and WhatsApp or the enquiry form reach us too.