Greater London · England
External & façade joints in Church End, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Church End and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints where the bead has come unstuck
- Hard, crazed mastic that has stopped moving
- Movement joints filled with mortar instead of sealant
External mastic in Church End
For buildings in Church End, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. Typical jobs include sealant that has lost its bond to the brick or render and old sealant gone brittle and cracked, on copings & trims, joints between brick and frames and façade panels.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. In a converted house in Church End, it’s worth checking who is responsible for the outside before booking.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Church End (N3, N12, NW7)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Church End: your questions answered
Can you help a landlord with a rental near New Southgate station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can parking be tricky for a visit in Church End?
Parking in Church End, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Can you reach joints on upper floors?
It depends on the height and the site. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
What affects the quote in Church End
The quote reflects the job in front of us. We look at:
- How many areas need sealing
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Helping us quote
What to tell us when you ask for a quote:
- The rough size of the job
- How we’d reach the joints
- If someone has resealed it before
- Where the property is
Getting a quote is simple: tell us what needs doing and where and its rough size. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Towns and villages near Church End
More services for Church End
Landlord and commercial work in Church End
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
If you manage several properties in or around Church End, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Common problems we fix in Church End
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Signs it’s time to call us include:
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
- Failed sealant between panels on a façade
Church End is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Questions to ask before booking
- Whether you can choose the colour
- When the joint can take water or movement
- Whether all the old sealant comes out first
- How long the guarantee is
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Aftercare tips
After the cure time, these simple habits help:
- Never let anyone fill a movement joint with mortar
- Fix overflowing gutters above sealed joints
- Have failed joints looked at early
- Walk round the building once a year and look at the joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
Walls and rooflines in Church End
Historic houses like Heath Hall (about 2.1 miles south-east) are a reminder that the area around Church End has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
Managing a site like Pardes House Grammar School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For an older house near a landmark such as St Margaret's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Church End is about 1 mile west of Finchley, in Greater London. Jobs in Church End get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Church End is one of 764 towns and villages in Greater London where we work for external mastic. There’s also a page for London, roughly 8 miles from Church End.
All of N3, N12 and NW7 is within our area for external mastic. You will find streets such as The Avenue, Cyprus Road and Gordon Road, and we cover them all. If you’re just outside Church End, we cover Finchley (1 mile east), Woodside Park (1 mile north), North Finchley (1 mile north-east), Friern Barnet (2 miles north-east) and Oakleigh Park (2 miles north-east). Within a short drive, we also cover London (8 miles south-east), City of Westminster (6 miles south), Marylebone (6 miles south), Kensington (7 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
Landmarks near Church End
We work in homes and buildings around Victoria Park, Francis Skaryna Belarusian Library and Museum and Christ's College. You’ll also find The Elephant Inn (0.9 miles north-east) and Woodhouse College (1.2 miles north-east). The closest station to Church End is New Southgate station, about 2.3 miles east of the centre. Well-known places in the area include Jewish Museum - Finchley (0.5 miles south) and Finchley Memorial Hospital (0.7 miles east). For a walk, there’s Darland's Lake and Lakeside Nature Reserve.
Different surfaces, different methods
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
What we do, step by step
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building for a typical job. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
- Let us know about stairs, lifts or work at height
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.