Quick answer: Chimney repointing in Hayes means raking out the old, crumbling mortar between your chimney’s bricks and replacing it with fresh mortar. It stops rain soaking into the brickwork, so the stack stays stable. Most Hayes chimneys take one to three days, though access adds time. We’re based in Hayes, so we can give you a free written quote.
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Key takeaways
- You need repointing when mortar is cracked, crumbly or recessed deep into the joints.
- Left too long, wet brickwork leads to damp in bedrooms and a loose, unsafe stack.
- The new mortar should be softer than the brick. So on older homes that often means a lime mortar.
- Access is also a big part of the price. Scaffolding or a tower is usually needed, too.
- Roofers also often do repointing alongside lead flashing and flaunching repairs.
In this guide
What is chimney repointing?
Mortar holds the bricks in a chimney stack together. Over the years, rain, frost and heat break that mortar down. It then cracks, shrinks and washes out of the joints.
So repointing means carefully raking out the weak mortar to a sound depth, cleaning the joints, and filling them with new mortar that’s pressed in and finished neatly. When it’s done properly, the chimney sheds water again and the bricks stay locked together.
A chimney stack takes the worst of the weather on any house, especially in winter. It sits above the roofline, catches wind-driven rain from every side and never dries out as fast as a wall, so it weathers sooner. Working chimneys have it harder still: they heat up and cool down every time the fire’s lit, and damp flue gases slowly attack the mortar from the inside. That’s why stacks in Hayes often need repointing long before the walls of the house do.
This guide is about Hayes in the London Borough of Hillingdon (UB3 and UB4), not Hayes near Bromley in Kent.
How do you know your chimney needs repointing?
First, look at your chimney from the street or garden, with binoculars if you have them. Signs to look for:
- mortar that’s cracked, crumbly or missing between bricks
- joints that have worn back so you can see shadows between the bricks
- plants or moss growing out of the stack
- loose or spalled (flaking) bricks
- white, chalky salt stains on the bricks (efflorescence), a sign water is soaking through
- damp patches on a chimney breast, a bedroom ceiling or in the loft next to the stack, especially after rain
- bits of mortar or grit in the gutter or on the ground below
If the stack looks like it’s leaning, or bricks are loose near the top, call a roofer straight away, because that’s a safety risk, not a repointing job, and it may need a partial chimney rebuild.
Chimney repointing in Hayes and related chimney services
| Service | Best for | What’s included |
|---|---|---|
| Chimney repointing | Cracked, crumbly or missing mortar | Rake out, clean, repoint and finish the joints |
| Lead flashing | Leaks where the stack meets the roof | Replace lifted or split lead and seal to the brickwork |
| Flaunching | Cracked cement collar around the pots | Remove and re-form the flaunching to shed water |
| Pots, caps and cowls | Rain, birds or debris getting in | Refix or replace pots, fit caps or cowls |
| Partial or full rebuild | Loose, leaning or badly spalled stacks | Take down to sound brickwork and rebuild |
| Roof repairs around the stack | Tiles or slates disturbed by the chimney | Replace and refix tiles (roof repairs) |
See all our chimney services.
Areas we cover for chimney repointing in Hayes
We’re based on Barra Hall Road in Hayes, so we carry out chimney repointing in Hayes right across the town:
- Hayes Town and Botwell
- Hayes End and Wood End
- Yeading
- Harlington
- Barra Hall and the streets around Barra Hall Park
- Hayes Station and North Hyde
Postcodes: UB3 and UB4. We also cover nearby Southall, West Drayton, Yiewsley, Hillingdon and Uxbridge.
Does chimney repointing in Hayes need planning permission?
Like-for-like repointing is a repair, so it doesn’t normally need planning permission or Building Regulations approval. Even so, there are a few times to check first:
- Listed buildings need listed building consent for most changes, including the type of mortar.
- Conservation areas may have extra controls. Check with Hillingdon Council when you’re not sure.
- Shared chimney stacks. In semis and terraces the stack is often shared with next door. Work to a shared stack can count as work to a party structure under the Party Wall etc. Act 1996, which needs a notice served at least two months before work starts (legislation.gov.uk). Simple like-for-like repairs are often agreed neighbour to neighbour, but it’s worth checking (gov.uk guidance).
- Scaffolding on the pavement needs a licence from the council. Your scaffolder normally arranges it.
Why the mortar matters for chimney repointing in Hayes homes
The new mortar should always be softer and more breathable than the brick, so any moisture escapes through the joints, not the face of the brick. Hard cement mortar on soft old bricks traps water, then frost blows the face off the bricks.
Also, many homes in Hayes are 1920s and 1930s semis and terraces built with lime-based mortar. So on those, we match the existing mortar, which often means a lime mix. Historic England’s guidance on repointing brick walls explains why unsuitable repointing damages old masonry (Historic England).
How do roofers reach the chimney?
Access is often the biggest single part of a quote for chimney repointing in Hayes, so it’s worth knowing the options:
| Access | When it’s used | What it means for you |
|---|---|---|
| Roof ladder | Small jobs like refixing a pot | Cheapest, but not safe for a full day of repointing |
| Chimney scaffold | Stack sits mid-roof and the roof can take the load | Built around the stack on the roof itself; no pavement licence needed |
| Scaffold tower | Low roofs with good ground access at the side or back | Quick to put up, good value on many Hayes semis |
| Full scaffolding | Tall or shared stacks, or front elevations | Safest for bigger jobs; may need a council licence if it’s on the pavement |
| Cherry picker | Short jobs where the vehicle can park close | Rare on terraced streets; depends on parking |
Either way, we’ll tell you which one your chimney needs, and why, before you agree to anything.
How much does chimney repointing cost in Hayes?
The price depends on:
- the size of the stack and how many faces need repointing
- access (a scaffold tower, roof ladders or full scaffolding)
- the type of mortar (lime work takes longer)
- any extra repairs found once we’re up there, like flashing or flaunching
Checkatrade’s chimney repointing cost guide (cost table updated May 2024) puts the UK average at about £750 per chimney. It lists raking out at about £35 per m², repointing brickwork at about £55 per m² and a scaffold tower at around £300 (Checkatrade). London prices are often a bit higher than the UK average. Still, only a free survey gives you the real price for your chimney, in writing.
Want a price for your chimney?
Send us a photo on WhatsApp or book a free survey, then you’ll get a written quote that includes access.
How long does chimney repointing in Hayes take?
Checkatrade’s guide says a small chimney is usually done in under a day, while a larger one takes two or three days. On most Hayes semis we allow one to two days on the stack itself, but add time to put up and take down access. Lime mortar also needs protecting from frost and heavy rain while it cures, so we plan around the weather.
How to choose someone to repoint your chimney
Check that they:
- inspect the stack properly, with photos, before quoting
- explain which mortar they’ll use and why
- rake out to a proper depth, not just smear new mortar over the top
- check the flashing, flaunching and pots while they’re up there
- give a written quote that says what access is included
- have real Google reviews you can read
What our customers say
We’ve worked on more than 20 chimneys and over 100 roofs, and we’re rated 5.0 from 20 Google reviews. One customer wrote:
“They offered practical advice without any pressure.”
Google review
Why choose M.K & Sons Roofing for chimney repointing in Hayes?
- On your doorstep: our base is on Barra Hall Road, Hayes.
- Free written quote after a proper look at the stack.
- The right mortar for your house, not one mix for every job.
- Fully guaranteed work.
Our chimney repointing process in Hayes
- Free survey. We look at the stack, take photos and check the flashing and flaunching.
- Written quote. You get the price, the access needed and the mortar we’ll use.
- Access. We then set up a scaffold tower or scaffolding safely.
- Rake out. We remove loose and weak mortar to a sound depth.
- Repoint. We fill the joints and finish them neatly to match.
- Final check. Finally, we tidy up and send you photos of the finished stack.
Frequently asked questions
What’s the average cost of repointing a chimney?
Checkatrade puts the UK average at around £750 per chimney, with access a big part of the price. A small stack reached from a tower costs less than a large shared stack that needs full scaffolding. We give a free written quote for your chimney after a survey, so you know the real figure.
How urgent is chimney repointing?
If the mortar is only starting to crack, it’s not an emergency, but it’s worth doing before winter. But if bricks are loose, the stack is leaning or water is coming into a room, it’s urgent. Frost gets into wet joints and makes the damage worse quickly, so don’t leave it for years.
Can a roofer repoint a chimney?
Yes. Chimney repointing is a normal part of roofing work, because the stack sits on the roof and links to the flashing and tiles. A roofer can also fix the lead flashing and flaunching at the same time, which saves paying for access twice.
How long does chimney repointing last?
Good repointing with the right mortar usually lasts for many years, and often for decades too. How long it lasts also depends on exposure, the quality of the bricks and the mortar used. Keeping the flaunching, flashing and pots in good order helps the new pointing last longer.
Do I need scaffolding to repoint a chimney?
Usually, yes. Repointing needs safe, steady access around the stack while we work, often for a day or more. Depending on the roof, that might be a scaffold tower, a chimney scaffold that sits on the roof, or full scaffolding from the ground. We’ll explain the choice in your quote.
Can you repoint a shared chimney with next door?
Yes. On semis and terraces especially, the stack is often shared. We’ll talk to you about letting your neighbour know, and whether the Party Wall Act applies. Sharing the access cost with next door can also make it cheaper for both of you.
Need chimney repointing in Hayes?
Looking for someone to repoint your chimney near you in Hayes? Call M.K & Sons Roofing on 07720 607862, or send us a WhatsApp with a photo of your chimney. We’ll then book a free survey and give you a clear written quote.