Greater London · England
External Mastic in Bounds Green
Sealing brickwork movement joints, render, cladding and façade joints for Bounds Green, backed by a 12-month guarantee. Call for a quick quote.
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
- Weathered mastic that no longer stretches
Surface by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
About our external mastic in Bounds Green
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. Common call-outs are for failed seals between different materials and joints where the bead has come unstuck, across concrete & block, render & cladding joints and copings & trims.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Bounds Green, tell us how high the joints are and how to reach the back of the building.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Where
- Bounds Green (N22, N11, N13)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Bounds Green
Jobs vary more than people expect. What affects the quote:
- The product the joint needs
- Mould in or behind the old joints
- How easy the joints are to reach
- The number of rooms or windows
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What we need to know
Before you ask for a quote, have a think about:
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- Access, such as stairs, a lift or height
- The type of property
If you’re in Bounds Green and need external mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Why act early in Bounds Green
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render around the joint, so the damage spreads beyond the joint. In a flat in Bounds Green, 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.
The cost depends on the amount of work, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why Bounds Green customers choose us
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
- Over 20 years’ experience
- 4.9 on Google from 180+ five-star reviews
See our cost guide or customer reviews.
How the visit works
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Bounds Green. It helps if you can point us to a visitor permit or a bay close to the door.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- 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.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
Related advice
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Tell anyone working on the walls about the movement joints
- Deal with leaking gutters that soak the joints below
- Wash walls gently around the sealant
- Look over the joints every year, ideally after winter
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
External mastic in Bounds Green: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Bruce Castle (about 2.2 miles east) nearby, there’s older building stock in the area around Bounds Green as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Schools such as Bounds Green Infant School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as St Barnabas Greek Orthodox Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. As a London address, Bounds Green can be tricky for parking: let us know about parking bays, permits or a driveway.
Bounds Green is about 2 miles east of Finchley, in Greater London. Homes, rented property, offices and hotels in Bounds Green is covered for external mastic. The work is guaranteed for a year. 764 places in Greater London are on our list, large and small. Our London page covers work nearby, about 8 miles away.
Here we cover the N22, N11 and N13 postcode area for external mastic. If you need external mastic at a property on Oak Lane, York Road and Park Road or a nearby road, we can help. With the A109 close by, Bounds Green is simple for us to get to. Neighbouring places we cover for external mastic include Bowes Park (1 mile south-east), Arnos Grove (1 mile north), New Southgate (1 mile north-west), Oakthorpe Park (1 mile north-east) and Palmers Green (1 mile north-east). Within a short drive, we also cover London (8 miles south), City of Westminster (6 miles south), Marylebone (6 miles south), Kensington (8 miles south-west), St Pancras (6 miles south) and Shoreditch (6 miles south).
Landmarks near Bounds Green
In Bounds Green, that means homes and buildings near Ming-Ai, O. R. Tambo Recreation Ground and The Springfield pub and the streets around them. There’s a railway station in Bounds Green itself: Bowes Park station. Other landmarks nearby include Broomfield House Museum (0.8 miles north-east) and Greentrees Hospital (1.1 miles east). Not far away are Glebelands Local Nature Reserve and Darland's Lake.
Bounds Green: your questions answered
Is parking an issue for external mastic in Bounds Green?
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 Bounds Green?
Yes, Bounds Green is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Do you work at height?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we’ll confirm the access.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first.
Do you work for landlords and businesses?
Yes, often. We can quote for several properties at once.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Can you seal joints between two different materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces with primer where required.
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When something else is needed
We won’t take on work that will not last, so here’s what sealant can’t put right:
- Structural movement, which needs a surveyor or engineer
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.