Greater London · England
External Mastic in Broadwater Farm
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Broadwater Farm and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Rain getting behind render or cladding at a joint
- Failed sealant between panels on a façade
- Rigid filler in a joint that should flex
What the job involves on each surface
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
External mastic for homes and businesses in Broadwater Farm
On houses, flats and commercial buildings across Broadwater Farm, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you have weeds or debris growing in open joints and gaps where render, brick and frames meet, we can help.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Broadwater Farm, tell us how high the joints are and how to reach the back of the building.
A 12-month guarantee comes as standard.
- Where
- Broadwater Farm (N17, N15, N22)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Broadwater Farm
More services for Broadwater Farm
When to call us in Broadwater Farm
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
Signs it’s time to call us include:
- Leaking joints around cladding and façade panels
- Hard, crazed mastic that has stopped moving
- Failed seals between different materials
- Joints pointed up with cement by mistake
Homes close to St Philip the Apostle include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Before booking anyone
- Who turns up on the day
- What the quote includes, VAT included or not
- Are they insured?
- What guarantee comes with the work
Common questions in Broadwater Farm
I let a flat near Bruce Grove station. Can you help?
Yes. We work for landlords and agents as well as homeowners. 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 Broadwater Farm?
Parking in Broadwater Farm, 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.
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.
What information do you need?
Tell us what needs doing and where. We will ask anything else we need to know.
What does external mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
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.
Should I point up the gap in my brickwork?
No. Rigid materials cannot move with the wall and the joint fails. If it has already been filled, we can generally cut it out and reseal it.
How the visit works
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes anything from a few hours to several days, depending on the building. In a London area like Broadwater Farm, 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.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
Get a quote
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Advice
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Leave the joints unpainted unless we have said otherwise
- Keep water from gutters off the wall
- Keep soil, plants and ivy away from the joints
- Avoid pressure-washing directly into sealant joints
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Broadwater Farm buildings and the weather
Historic houses like Bruce Castle (about 0.4 miles north-east) are a reminder that the area around Broadwater Farm 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. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
Rented homes near Bruce Grove station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. For site and facilities teams at buildings such as The Willow Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Broadwater Farm is about 2 miles south-west of Edmonton, in Greater London. For external mastic in and around Broadwater Farm, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We are based in Crawley and cover Greater London, Broadwater Farm included. 764 places in Greater London are on our list. There’s also a page for London, about 7 miles away.
Our applicators cover all of the N17, N15 and N22 postcode area for external mastic and the streets around it. If you need external mastic at a property on High Road, Ripon Road and Clyde Road or anywhere close by, our applicators can take on the job. Broadwater Farm sits on or near the A10, which makes travel easy. If you are just outside Broadwater Farm, we cover Tottenham (1 mile east), West Green (1 mile south-west), Tottenham Green (1 mile south-east), Duckett's Green (1 mile south-west) and South Tottenham (1 mile south-east). Further out, we also cover London (7 miles south), City of Westminster (6 miles south-west), Marylebone (6 miles south-west), Kensington (8 miles south-west), St Pancras (5 miles south) and Shoreditch (5 miles south).
Landmarks near Broadwater Farm
Around Broadwater Farm, our work takes us to homes and buildings near Park View School, Bruce Castle Park and Bruce Castle School, among other places. The nearest railway station is Bruce Grove station, roughly 0.5 miles east of the centre. A little further out are Markfield Beam Engine and Museum (1.2 miles south-east) and North Middlesex University Hospital (1.3 miles north). For a walk, there’s Railway Fields and Hollow Pond.
Landlord and commercial work in Broadwater Farm
For anyone letting property in or around Broadwater Farm, several properties can go on one quote. Just tell us the addresses and what each one needs.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Why deal with it now?
Low-modulus sealants stretch easily, so they put less strain on the joint 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. In a flat in Broadwater Farm, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
Why book with us
- Experience in homes, commercial sites and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
- White, clear, grey or another colour, product permitting
- We never seal over old sealant
Take a look at how sealant jobs are priced and what customers say.
What affects the cost of external mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- When we can work, for business premises
- The size of the job
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
What to tell us when you ask for a quote:
- The problem you’ve noticed
- How we’d reach the joints
- Photos by email, if that’s easy
- Whether it’s a home or a business
Want a quote for external mastic? Please call 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before any work starts.