My roof is leaking — what to do right now

If your roof is leaking, the first step is to contain the water and limit the damage, then get a roofer to find and fix the source before it spreads. Put a bucket under the drip, move anything valuable clear, dry the area to stop mould, and book an inspection. Water that gets into the structure does not stop on its own, and a small drip left alone becomes a rotten joist and a ruined ceiling.

What you do in the first hour matters more than most people realise. The good news is that the early steps are simple, and most of them you can do yourself. This guide covers how to confirm you actually have a leak, how to limit the damage straight away, the stop-gaps that are safe to attempt at home, and the point at which you should put the ladder down and call a roofer.

How to tell if your roof is leaking

The signs inside the house are usually easier to spot than the source on the roof. Look for:

• Brown or yellow discolouration on a ceiling or upstairs wall
• Damp patches that grow after rain
• A musty smell, mould or mildew in a room or in the loft
• Water actually dripping during or after heavy weather
• Flaking paint or bulging plaster

The tricky part is that the stain on your ceiling is rarely directly below the hole. Water runs along rafters and the underside of the roof until it finds a low point to drip from, so the entry point can be a metre or more away from where you see the damage.

Finding the source

If you can safely get into the loft, do your detective work there before going anywhere near the roof itself:

1. Look in daylight. Go up during the day with a strong torch. If you can see pinpricks of daylight coming through, you have found gaps that need attention. Only ever stand on the framing timbers, never on the insulation or the back of the plasterboard ceiling.
2. Trace the water back uphill. Follow the stain or run mark on the timbers from where it drips back up towards its highest point. That is usually where the water is getting in.
3. Try a controlled water test. Once everything has dried out, have someone run a hose over one small section of the roof at a time while you watch from inside the loft. Working section by section tells you exactly where the water comes through. Mark the spot with chalk so you can find it again.

If your loft is boarded over, or you cannot get into the roof space at all, this is the point where an inspection from a roofer makes more sense than guesswork. A roof survey and report pins down the source without you setting foot on the roof.

Immediate steps to limit the damage

While you arrange a repair, the priority is keeping water out of your home and out of the structure.

1. Catch the water. Put a bucket under the drip. If it is coming down fast, keep a second bucket ready to swap in. Standing a piece of timber upright in the bucket stops the constant dripping noise and reduces splashing.
2. Dry the area quickly. Mop or towel up standing water and run a fan to move air across the damp patch. Drying it out promptly is what stops mould taking hold.
3. Move what you can. Shift furniture, electronics and anything valuable clear of the drip and lay down towels or a dust sheet.
4. Ease a bulging ceiling. If a patch of ceiling is sagging and holding a pool of water, that water is going to come through anyway. With a bucket underneath, a small hole made with a screwdriver lets it drain in a controlled way rather than the whole section collapsing at once.

Safe DIY stop-gaps

Some minor problems are within reach of a confident homeowner. The honest answer, though, is that almost everything on a roof is safer left to someone with the right access equipment. Anything you do attempt should be done from ground or loft level wherever possible.

A couple of small jobs that are genuinely manageable:

• Shiners (loose nails in the loft). Sometimes a damp spot in the roof space is not a leak through the slates at all. It is condensation forming on the cold shank of a nail that has missed the timber and is poking through. Clip the offending nail back flush with a side-cutting plier and the dripping stops. This only fixes condensation on shiners, not water coming in from outside.
• A sealed joint or corner on guttering. A leaking gutter joint can be re-bedded with silicone sealant once it is clean and dry.

What we would not recommend tackling yourself:

• Anything that needs you up on a steep or slippery roof
• Re-bedding slates or tiles, ridge or flashing
• Ice damming, where frozen meltwater backs up under the slates
• Any sign of structural movement, sagging or widespread rot

These cause more damage if done badly than the original leak, and the fall risk is real. A patch of mould in a dark loft can quietly eat into the timber for years before anyone notices, by which point the repair is structural rather than a quick fix.

When to call a roofer

Stop and call a professional if any of these apply:

• The roof is steep, or the property is more than a couple of storeys
• Slates or tiles are slipped, cracked or missing
• You can see daylight through the roof from inside
• There is sagging, or you suspect rot in the structure
• You do not have the right tools or safe access
• You simply are not confident working at height

A roofer will not only inspect the outside but check the underside of the roof from within for water damage you would not otherwise see. If you think you might claim on your buildings insurance, get a written estimate for the repair before any work starts — our roof insurance claims guide explains what cover usually includes. For the early warning signs that come before a leak, signs your roof needs attention is a useful companion read.

If you live in a tenement or share a roof with neighbours, a leak may fall under a statutory notice and shared repair costs.

Don’t wait

A leaking roof never repairs itself, and it only ever gets more expensive. Fixing it the day you spot it is the cheapest that repair will ever be. Better still, a regular inspection catches the small faults before they become leaks at all — prevention really is cheaper than cure here.

If you have a leak in Edinburgh or central Scotland and want it looked at quickly, get in touch or call our emergency line on 0800 234 3243. You can also see what we cover under roof repairs.