Greater London · England
Leyton External Mastic
Movement joints in Leyton need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Sealant that has lost its bond to the brick or render
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
What we do, step by step
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It generally takes a few hours for a handful of joints, longer for a whole elevation. In Leyton, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or email us.
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External mastic in Leyton, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. If you have rigid filler in a joint that should flex and sealant pulling away from one side of the joint, we can help, on copings & trims, concrete & block and façade panels alike.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Leyton, joints up high may need ladders or other access, which is worth talking through when you book.
Each job carries a 12-month guarantee, large or small.
- Place
- Leyton (E10, E11, E17, E15)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
External mastic in Leyton: local notes
In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts. With historic houses such as Sutton House (about 2.2 miles south-west) nearby, there’s older building stock in the area around Leyton as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Managing a site like Dawlish Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. For landlords with property near Leyton Midland Road station, outside joints that have cracked can let damp into a rental, so check them between lets. For an older house near a landmark such as Christian Hope Ministries International, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Leyton is about 6 miles north-east of London, in Greater London. Leyton gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Leyton is one of 764 towns and villages in Greater London we cover. For nearby work, see our London page (6 miles or so).
Every address in E10, E11, E17 and E15 is within our area for external mastic. We cover properties on Church Road, Oakum Square and Scott's Road. You will find Leyton on the A104 and A112, so it’s easy for us to get to. We also cover the places around Leyton: Leyton Grange (1 mile west), Bakers Arms (1 mile north), Leytonstone (1 mile east), Holloway Down (1 mile south-east) and Bushwood Area of Leytonstone (1 mile east). Larger places within reach include London (6 miles south-west), City of Westminster (7 miles south-west), Marylebone (7 miles south-west), Kensington (10 miles south-west), St Pancras (5 miles south-west) and Shoreditch (4 miles south-west).
What’s near Leyton
We work in homes and buildings around The Lammas School, Leyton Jubilee Park and The European pub, among other places. Leyton has its own railway station: Leyton Midland Road station. Other landmarks nearby include Queen Mary's Hospital for the East End (1.7 miles south) and Walthamstow Pump House Museum (1.4 miles north-west). The countryside around Leyton includes Pole Hill and Hollow Pond.
What affects the cost of external mastic
There’s no set price list. The quote depends on:
- The type of sealant required
- Access and height
- Whether there’s mould to deal with
- The number and length of the joints
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Asking for a quote
What to tell us when you ask for a quote:
- Photos by email, if that’s easy
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
- Whether it has been sealed before
Want a quote for external mastic? Please call 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Towns and villages near Leyton
What else we do in Leyton
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Leyton, the repair is bigger than a sealant job.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins, so you know where you stand.
Why us?
- Homes, businesses and hotels
- Every job guaranteed for a year
- Colour picked to suit the job
- White, clear, grey or coloured to suit, where the product allows
Read what affects the cost or our reviews.
How the job changes by surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Honest limits
To be straight with you, some problems need a different trade:
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
- Cracked brickwork or render that needs a builder or plasterer
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
Leyton questions
Do you work for landlords with property near Leyton Midland Road station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking an issue for external mastic in Leyton?
Parking in Leyton, 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.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
What is a movement joint?
Walls move with heat, cold and moisture, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep high-pressure jets off the joints
- Fix overflowing gutters above sealed joints
- Don’t let climbing plants root in the sealant
- Check the sealant is paintable before painting near it
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.