Greater London · England
External Mastic in Turnpike Lane
External mastic for Turnpike Lane, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints with sealant missing in places
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
About our external mastic in Turnpike Lane
For buildings in Turnpike Lane, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We work on render & cladding joints, joints between brick and frames and façade panels, and common reasons people get in touch are gaps where render, brick and frames meet and failed sealant between panels on a façade.
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. For a flat in Turnpike Lane, check the lease for who looks after the outside.
You get a one-year guarantee, the same in Turnpike Lane as everywhere else we work.
- Place
- Turnpike Lane (N8, N22, N15)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Turnpike Lane
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Look out for these signs:
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
Schools such as North Harringay Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What insurance they hold
- How hidden problems are handled
- What preparation is included
- How much experience the applicator has
Also near Turnpike Lane
Also in Turnpike Lane
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Damp that is not coming from the joint
- Walls that need new movement joints cut into them
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Façade panels
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take a few hours to a few days, depending on the length of joint and the access. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Keep children and pets away from the work area
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
How to get a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.
Related advice
Landlords, agents and businesses in Turnpike Lane
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What happens if it’s left?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why Turnpike Lane customers choose us
- An ARBOMaster approved applicator
- We’re fully insured
- You choose the colour before work begins
- Neat joints and a tidy finish
See what affects the cost and our reviews.
What the job involves on each surface
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Common questions in Turnpike Lane
Is parking a problem for a job in Turnpike Lane?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do external mastic in Turnpike Lane?
Yes. We work across London and the South East, and Turnpike Lane is part of that. You can call 0345 464 0079 or email us and let us know what needs doing.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints.
How do I get a quote for external mastic in Turnpike Lane?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move and needs a flexible seal, not mortar.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Outside joints around Turnpike Lane
Historic houses like Bruce Castle (about 1.5 miles north-east) are a reminder that the area around Turnpike Lane has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Hornsey station? Then outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of St John The Baptist (greek Orthodox), old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Turnpike Lane is about 3 miles north of Highbury, in Greater London. For external mastic in and around Turnpike Lane, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We are based in Crawley and cover Greater London. Across Greater London, we cover 764 places, and Turnpike Lane is one of them. For nearby work, see our London page (6 miles or so).
Postcode districts we cover here for external mastic: N8, N22 and N15. That includes homes and businesses on Bury Road, High Road and Glebe Road. Other places close to Turnpike Lane include Hornsey (1 mile west), Noel Park (1 mile north), Wood Green (1 mile north), Stroud Green (1 mile south) and Crouch End (1 mile south-west). Larger places within reach include London (6 miles south), City of Westminster (6 miles south), Marylebone (5 miles south), Kensington (7 miles south-west), St Pancras (4 miles south) and Shoreditch (5 miles south).
Landmarks near Turnpike Lane
We work in homes and buildings around Moselle Upper School, The Toll Gate pub and Ducketts Common. There’s a railway station in Turnpike Lane itself: Hornsey station. Other landmarks nearby include Hornsey Central Hospital (1.1 miles west) and The Mall Wood Green (under half a mile north). Green spaces nearby include Darland's Lake and Railway Fields.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.