Chimney Flashing Leak in Liverpool? Why the Lead Fails and What It Costs to Fix (2026)

By Chris, owner of Everlast Roofing North West (20+ years on Merseyside roofs) · About Everlast Roofing · Last updated 2026-07-21

I got a call from a lad in Anfield last autumn. Brown ring on the bedroom ceiling, right in the corner where the chimney breast is, getting bigger every time it rained hard. He had already had two roofers out. One told him he needed the whole back pitch re-roofed, about nine grand. I went up, and it took me about four minutes to find it. The lead soakers down the side of the stack had corroded through and someone had gone over the top with a smear of cement that had cracked. No re-roof needed. New lead, repoint the stack, done in a day. He rang me a fortnight later to say the ceiling had finally dried out.

That is the single most common leak I get called to in Liverpool, and it is the one most likely to be mis-sold. Water shows up by the chimney, the homeowner assumes the roof is finished, and a certain type of roofer is happy to let them believe it. The truth is duller and a lot cheaper. The lead around a chimney has a life, the mortar has a shorter one, and when they go the water runs down the stack and into the house. Here is how to tell what is actually wrong before anyone quotes you for a new roof.

Where a chimney actually leaks on a Liverpool roof

A chimney is the busiest bit of any Liverpool roof. It is a big lump of brick pushed up through the slates, and every edge where it meets the roof has to be sealed with lead. On a typical Victorian or Edwardian terrace (L4, L6, L9, L13, the streets around Anfield, Walton and Tuebrook) there are three pieces of lead doing that job. The front apron, which throws water off the leading face of the stack. The soakers, which are small pieces of lead woven into each course of slate down the two sides. And the back gutter, the hidden tray behind the stack that catches everything running down the pitch above it.

Any one of those failing lets water track down the outside of the stack, through the brick, and along the timbers until it drops onto your ceiling, usually a foot or two away from where it actually got in. That is why chimney leaks are so often misdiagnosed. The wet patch is rarely directly under the hole.

The other culprit is the stack itself. The mortar joints (the pointing) and the mortar the pots sit in (the flaunching) weather out over the decades, and once they are open the brick soaks up rain like a sponge. A Liverpool stack that has not been repointed in forty years is often letting water in through the brickwork itself, nothing to do with the roof below it at all.

Lead or cement? The test that tells you if you have been bodged

Here is the check that matters, and you can do the first part from the pavement with a pair of binoculars. Look at the joint where the chimney meets the slates. If you can see a band of dull grey metal that has been folded and dressed neatly into the brickwork, that is lead, and lead done right lasts fifty years or more. If you can see a smeared line of grey cement filling the gap instead, that is a mortar fillet, and it is the roofing equivalent of a bodge. Cement and lead expand and contract at different rates through a Merseyside winter, so a fillet cracks, and once it cracks it funnels water straight in.

Mortar fillets are everywhere in Liverpool because they are quick and cheap. A roofer in a hurry, or a general builder who is not really a roofer, slaps cement over an old lead detail rather than stripping it out and replacing it. It looks fine for a winter or two. Then it fails, and the homeowner assumes the whole roof has gone.

The proper repair is to rake the old muck out, fit new dressed lead (a front apron, fresh soakers down each side and a stepped flashing chased into the joints), and repoint the stack while the scaffold is up. If your leak is by the chimney and you can see cement instead of lead up there, you almost certainly need chimney and lead flashing work, not a new roof. A thirty minute roof inspection with photos will confirm it in writing.

What chimney flashing and repointing costs in Liverpool in 2026

Honest numbers for Merseyside in 2026, and the biggest variable by a mile is access. If the stack is reachable off a roof ladder and only the front apron or a length of stepped flashing needs renewing, you are looking at £300 to £500. Full leadwork on all sides of the stack, apron, soakers and stepped flashing, with scaffolding or a tower for a day, is £500 to £900. Repointing the stack (raking out and refilling the joints) on the same visit adds £150 to £350. Re-doing the flaunching so the pots sit sound is another £80 to £180.

If the stack is tall, awkward, shared with the neighbour, or on a three-storey terrace where full scaffolding is unavoidable, the scaffolding itself can be £400 to £900 of the total, and it should be a separate line on your quote, never buried in the price. A completely rebuilt stack (bricks taken down and relaid because the brickwork itself has failed) is a bigger job again, £1,200 to £2,500, but that is genuinely rare and you should see clear photos of spalled, loose brickwork before anyone quotes it.

The reason this matters is the gap. A chimney leak fixed properly is a few hundred pounds. The same leak sold as a re-roof is nine to fourteen thousand. That is the whole game. Before you accept any large quote for a leak that only appears near the chimney, ask to see photographs of the flashing and the pointing, and ask the roofer to point out on the picture exactly where the water is getting in. An honest one will have the photos ready. We take them as standard, and we never take a deposit for work at this scale, the balance is due on completion.

When it is more than the flashing (and how to know)

There are times a chimney leak really is a sign of something bigger, and you deserve to know the honest version of that too. If the flashing is sound lead in good order but the slates immediately around the stack are slipped, cracked or missing across a wide area, the water may be coming through the slate field rather than the lead. If the timbers in the loft around the chimney breast are soft, dark and crumbling when you press them, the leak has been running a long time and there may be rot to deal with as well as the flashing.

And if the stack is leaning, has stepped cracks running down through several courses of brick, or the pots are visibly loose, that is a structural job, not a quick reflash. A leaning Liverpool stack in a high wind is a genuine safety issue and wants dealing with, but it is still a chimney repair, not a reason to re-roof the whole house.

The way you tell the difference is always the same. Photographs of the actual fault, explained in plain English, before any money changes hands. If a Liverpool roofer cannot show you what is wrong and point to it, be careful. If your leak is urgent and water is coming in now, we can usually get out to make it watertight quickly, our emergency roof repair cover is for exactly this, then quote the permanent lead fix once it has stopped raining in.

• Before you ring anyone, note where the damp patch is. If it is on or beside the chimney breast wall, tell the roofer, it points straight at the flashing.
• Look up at the stack from the pavement with binoculars or your phone camera zoomed in. Grey folded metal at the joint is lead (good). A smeared grey line is a cement fillet (the likely cause).
• Take a torch into the loft and feel the timbers around the chimney. Soft and dark means the leak is not new and wants dealing with soon.
• Ask the roofer to photograph the flashing and the pointing and show you exactly where the water gets in before quoting.
• Make sure scaffolding, if needed, is itemised as its own line on the written quote, not hidden in the total.
• Never pay a deposit for chimney or flashing work at this scale. Balance on completion is the norm with an honest Liverpool roofer.

Frequently asked questions

For more local roofing advice, browse the Everlast Roofing blog or call Chris on 07933 828 045.