Greater London · England
External & façade joints in Tottenham Green, Greater London
External mastic for Tottenham Green and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Moss and dirt in joints with no sealant left
- Leaking joints around cladding and façade panels
- Rain getting behind render or cladding at a joint
Different surfaces, different methods
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
External mastic in Tottenham Green
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. We work on façade panels, copings & trims and joints between brick and frames, and common reasons people get in touch are weeds or debris growing in open joints and failed sealant between panels on a façade.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall, and both kinds of building are found across London.
Our work is backed for twelve months, in Tottenham Green and everywhere else we cover.
- Where
- Tottenham Green (N15, N17, N16)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
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How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- Any mould that needs treating
- The amount of work
- How much old sealant there is and how hard it is to remove
- Access and height
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will explain what it covers.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Roughly how big the job is
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- If someone has resealed it before
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
How the visit works
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes anything from a few hours to several days, depending on the building from start to finish. In a London area like Tottenham Green, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Ask for a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
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Questions from Tottenham Green
Is parking an issue for external mastic in Tottenham Green?
Parking in Tottenham Green, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you cover Tottenham Green for external mastic?
Yes. We work across London and the South East, and Tottenham Green is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin, matched as closely as the range allows.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, large or small.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels.
Do you have insurance?
Yes. We’re fully insured for domestic and commercial work.
Do you use backing rod?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
What external mastic looks like in Tottenham Green
Historic houses like Bruce Castle (about 0.9 miles north) are a reminder that the area around Tottenham Green has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of Holy Trinity, older walls, gutters and the joints where extensions meet them need a flexible sealant. Managing a site like Earlsmead Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Tottenham Green is about 2 miles west of Walthamstow, in Greater London. We carry out external mastic for householders, landlords and businesses in Tottenham Green and the surrounding area. We cover 764 towns and villages across Greater London, large and small. For nearby work, see our London page, about 6 miles away.
Work in N15, N17 and N16 works the same way as everywhere else we cover. Whether your property is on Ida Road, High Road and Hale Road or a nearby road, we can help. If you are just outside Tottenham Green, we cover South Tottenham (1 mile south), Seven Sisters (1 mile south), Tottenham Hale (1 mile east), St Ann's (1 mile south-west) and Broadwater Farm (1 mile north-west). Further out, we also cover London (6 miles south), City of Westminster (6 miles south-west), Marylebone (6 miles south-west), Kensington (8 miles south-west), St Pancras (5 miles south-west) and Shoreditch (4 miles south).
What’s near Tottenham Green
Locally, jobs take us to homes and businesses close to Church of St Andrew, Gladesmore Community School and Ada College and the streets around them. Other local landmarks include The Beehive Public House (0.5 miles north) and Chestnuts Park (0.8 miles west). Tottenham Green has its own railway station: Seven Sisters station. Well-known places in the area include Markfield Beam Engine and Museum (0.6 miles south-east) and The Mall Wood Green (1.6 miles west). The countryside around Tottenham Green includes Woodberry Wetlands and Hollow Pond.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
When to call us in Tottenham Green
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
The most common problems we see are:
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
- Movement joints filled with mortar instead of sealant
- Rain getting behind render or cladding at a joint
Letting a property close to Seven Sisters station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before you book
- Whether they seal over old material or remove it
- Which colour the sealant will be
- Whether the sealant suits the joint
- Who does the work, and how experienced they are
Looking after it afterwards
After the cure time, these simple habits help:
- Keep water from gutters off the wall
- Act on the first splits you see
- Keep soil, plants and ivy away from the joints
- Avoid pressure-washing directly into sealant joints
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Why act early in Tottenham Green
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. In a flat in Tottenham Green, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear price before any work starts.
Why book with us
- We never seal over old sealant
- We’re fully insured
- White, clear, grey or another colour, product permitting
- Domestic, commercial and hotel work
See our cost guide and what customers say.