The Homeowner's Guide to Roof Repairs
Common Roof Problems & What Causes Them
Understanding what has gone wrong with your roof is the first step to getting it fixed properly. Here are the most common problems we see on residential properties across Berkshire, Surrey, and Greater London — and what causes them.
Slipped or missing tiles are the single most common issue. On older roofs where tiles were nail-fixed to softwood battens, the nails corrode over time (especially in the damp Thames Valley climate) and tiles gradually work loose. High winds then lift them out of position. Modern BS 5534 requires mechanical fixing of every tile — clips, nails, or both — precisely to prevent this.
Deteriorated ridge mortar is almost universal on roofs over 25-30 years old. The sand-and-cement mix used to bed ridge tiles is exposed to freeze-thaw cycling every winter, and it gradually cracks and crumbles. Once the mortar fails, ridge tiles become loose and water enters directly into the roof space. The modern solution is a dry-fix ridge system (such as Redland DryVent or Klober Profile-Line) which uses mechanical clips and a roll-out ventilated ridge — no mortar to deteriorate.
Failed flashings around chimneys are another frequent culprit. Lead flashings should last 80-100+ years, but cheap lead substitutes (lead-effect tape, mortar fillets, or bituminous flashing strip) fail within 5-15 years. If your chimney flashing is anything other than proper Code 4 or Code 5 lead sheet dressed into stepped chases, it is a ticking time bomb.
Emergency vs Scheduled Repairs — Knowing the Difference
Not every roof problem is an emergency, and understanding the difference can save you money. A genuine roofing emergency is one where water is actively entering your living space, or where structural damage creates a safety risk — a large section of tiles blown off in a storm, a fallen tree branch through the roof, or a complete ridge collapse.
In these situations, you need a roofer who can attend within hours to make the property weathertight. Dripstop Roofing offers a rapid-response emergency service across Berkshire and the Home Counties — call us on 07405 391861 and we will get someone to you as quickly as possible.
A scheduled repair, on the other hand, is one where the problem exists but is not causing immediate water ingress — a cracked tile that has not yet leaked, mortar starting to crumble on ridge tiles, or moss build-up affecting drainage. These still need attention, but they can be planned in for a convenient date, often at a lower cost since we can batch multiple small repairs together in one visit.
DIY Roof Repairs vs Professional Work — Why the Risk Is Not Worth It
We understand the temptation to get up on the roof and fix a problem yourself — especially when it looks like just one tile needs replacing. But we strongly advise against it, for three important reasons.
- Safety — Falls from height are the single biggest cause of fatal workplace accidents in the UK. A domestic roof is typically 5-8 metres high, and even a single-storey extension is enough to cause life-changing injuries. Professional roofers use scaffolding, roof ladders, harnesses, and other fall protection — equipment most homeowners do not have access to.
- Damage — Walking on a tiled roof without knowing where to step causes more damage than it fixes. Concrete and clay tiles crack under direct foot pressure, and once cracked, they need replacing. We see at least two or three jobs per month where a homeowner's DIY attempt has turned one broken tile into six.
- Insurance — Most home insurance policies exclude damage caused by unqualified persons working on the roof. If your DIY repair fails and causes water damage to your interior, your insurer may refuse to pay out. Professional repairs come with guarantees and are carried out by insured tradespeople.
- Warranty invalidation — If your roof is under a manufacturer warranty (from Marley, Redland, etc.), having unqualified persons carry out repairs can void that warranty entirely.
How to Spot Early Warning Signs of Roof Damage
Catching roof problems early saves money and prevents interior damage. Here are the warning signs every homeowner in Berkshire and Surrey should watch for, ideally checked twice a year — once in autumn before the wet season, and once in spring to assess any winter damage.
From ground level, look for tiles that appear displaced, cracked, or missing. Check the mortar along the ridge line — any gaps, cracks, or loose-looking ridge tiles need attention. Look at the lead flashings around your chimney and any roof-wall abutments — lifting, cracking, or green oxidation staining on brickwork below the flashing indicates a problem.
Inside your loft space (if accessible), look for daylight showing through the tiles — this indicates slipped or broken tiles. Check for damp patches on the underside of the felt or membrane, water staining on timbers, and any musty smell that suggests persistent moisture. Pay particular attention to areas around the chimney stack, valleys, and any roof penetrations like soil vent pipes or Velux windows.
