A dripping ceiling rarely picks a convenient moment, and in South Wales it usually arrives with horizontal rain off the Bristol Channel. The good news is that most leaks come from a handful of common failure points, and there is plenty you can do straight away to limit the damage. This guide walks you through the emergency steps, how to trace the source, and which repairs are safe to tackle yourself.
Deal with the inside before you think about the roof. Move furniture and electronics clear, put a bucket under the drip, and lay towels or a plastic sheet over carpets. If a ceiling is bulging with trapped water, pierce the centre of the bulge with a screwdriver and let it drain into a bucket. It feels wrong, but a controlled hole is far cheaper to repair than a collapsed ceiling.
If water is anywhere near light fittings or sockets, switch off the electrics to that circuit at the consumer unit and do not turn them back on until everything is dry and checked. Then note exactly where and when the drip appears, because that detail makes tracing the source much easier later.
Water rarely drips directly below the hole. It runs along rafters, felt and joists before it finds a way through, sometimes travelling two or three metres from the entry point. Start in the loft with a torch during or just after rain and look for damp timber, staining on the underfelt, or daylight showing through. Follow any water trail uphill until it stops, and that is roughly where your problem sits.
From the ground, use binoculars to check the usual suspects. On the concrete interlocking tiles common across Bridgend estates, look for slipped, cracked or missing tiles. On older terraced properties with Welsh slate, look for slates that have slid out of line, often because the original iron nails have rusted through, a problem roofers call nail sickness. Also check the mortar on ridge tiles, the lead flashing around chimneys, and the valleys where two roof slopes meet, because these junctions cause a large share of leaks.
If the leak is a single slipped tile on a low bungalow roof and you are confident working from a properly footed ladder, you may be able to ease it back into place or fit a replacement, lifting the tiles above and sliding the new one under. Small gaps in flashing can be sealed temporarily with flashing tape or roof sealant, and a tarpaulin weighted over the damaged area, fixed above the leak so water runs over it, will keep a room dry for a few days while you arrange a proper repair.
Be honest with yourself about the limits. Sealant and tape are stopgaps that typically last months, not years, and working at height on a wet, mossy roof is genuinely dangerous. Anything involving the chimney, a valley, replacing slates, or more than one or two tiles is a job for someone with the right access equipment. A survey by a local roofer usually costs little or nothing, and a single tile replaced professionally often falls somewhere in the £80 to £150 range depending on access.
If your roof is leaking in several places, the underfelt is crumbling when touched, or you are calling someone out every winter, patch repairs become false economy. Bitumen felt under slates and tiles has a lifespan of roughly 30 to 60 years, and many roofs in the area laid in the 1960s and 70s are now reaching the end of theirs. At that point re-roofing, or stripping and refelting with a modern breathable membrane, is the lasting fix.
Costs depend heavily on the size of the roof, the covering, scaffolding needs and access, so treat any figure quoted without a proper inspection with caution. A reputable roofer will explain what they found, show you photos, and tell you plainly whether a repair will hold or whether you are better saving towards replacement. If a flat roof over an extension or garage is the culprit, ponding water and cracked felt are the usual signs, and modern EPDM or fibreglass replacements typically last 20 years or more.
Usually only if the leak was caused by a sudden event such as storm damage, rather than gradual wear and tear. Photograph the damage, keep any reports or quotes from your roofer, and report it to your insurer promptly, as most policies expect claims within a reasonable time.
More urgent than it looks. Even a slow drip soaks insulation, rots timber and encourages damp and mould, and a repair that costs a couple of hundred pounds now can grow into structural work costing thousands if left through a wet Welsh winter.
Only temporarily. You can staple a patch or divert water into a container to protect the ceiling, but the actual repair has to be made on the outside of the roof, because anything done underneath still leaves water getting into the structure.
Got a roof job in mind after reading this? Give Paul a call or send a photo, and you will get a straight answer and a free quote.