Greater London · England
External Mastic in Leytonstone
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Leytonstone and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed seals between different materials
- Rain getting behind render or cladding at a joint
- Joints where the bead has come unstuck
Landlord and commercial work in Leytonstone
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
External mastic for homes and businesses in Leytonstone
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. We work on brickwork movement joints, copings & trims and façade panels, and common reasons people get in touch are old sealant gone brittle and cracked and joints pointed up with cement by mistake.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Leytonstone, check the lease for who looks after the outside.
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.
- Location
- Leytonstone (E11, E10)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Leytonstone
More services for Leytonstone
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Act on the first splits you see
- Tell anyone working on the walls about the movement joints
- Look over the joints every year, ideally after winter
- Deal with leaking gutters that soak the joints below
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint, and paint can crack as the joint moves.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render, so the damage spreads beyond the joint. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Leytonstone, the repair is bigger than the sealant job would have been.
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What you get with us
- Colour picked to suit the job
- We leave the area clean and tidy
- Fully insured
- Trusted Arbo and Everbuild sealants
Leytonstone buildings and the weather
With historic houses such as Valentines Mansion (about 2.4 miles east) nearby, there’s older building stock in the area around Leytonstone as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
As a London address, Leytonstone can be tricky for parking: let us know about parking bays, permits or a driveway. For an older house near a landmark such as Church of St John the Baptist, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Leytonstone is about 1 mile east of Leyton, in Greater London. Homes, rented property, offices and hotels in Leytonstone is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Across Greater London, we cover 764 places, Leytonstone among them. There’s also a page for London, roughly 7 miles from Leytonstone.
All of E11 and E10 is covered for external mastic. Whether your property is on Bush Road, James Lane and Clare Road or a nearby road, we can help. Close by, we work in Bushwood Area of Leytonstone (1 mile east), Leyton (1 mile west), Holloway Down (1 mile south), Wanstead (1 mile north-east) and Bakers Arms (1 mile north-west). Larger places within reach include London (7 miles south-west), City of Westminster (8 miles south-west), Marylebone (8 miles south-west), Kensington (10 miles south-west), St Pancras (6 miles south-west) and Shoreditch (5 miles south-west).
Around Leytonstone
Around Leytonstone, our work takes us to homes and buildings near Leyton Jubilee Park, Forest School and Connaught School for Girls. There’s a railway station in Leytonstone itself: Leytonstone High Road station. Other landmarks nearby include 17 & Central (1.7 miles north-west) and Passmore Edwards Museum (1.8 miles south). Open spaces near Leytonstone include Old Ford Island and Pole Hill.
Common questions in Leytonstone
Do you work for landlords with property near Leytonstone High Road station?
Yes. We work for landlords and letting agents as well as homeowners. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Can parking be tricky for a visit in Leytonstone?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
How long should I leave it?
It depends on the product and the temperature. We tell you how long to leave it before we go.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you quote for more than one area?
Yes. Just list everything you need and we will quote it together.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
- Rising or penetrating damp from elsewhere in the wall
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Leytonstone
- Concrete & block
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
Signs you need external mastic in Leytonstone
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The problems people generally mention when they call include:
- Weeds or debris growing in open joints
- Sealant pulling away from one side of the joint
- Brick movement joints where the sealant has split
- Water getting into walls through failed joints
For site and facilities teams at buildings such as George Tomlinson Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- Whether you can choose the colour
- Whether all the old sealant comes out first
- Is VAT in the price?
- Who turns up on the day
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. It normally takes 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 Leytonstone. It helps if you can point us to a visitor permit or a bay close to the door.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
For external mastic in Leytonstone, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
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How we quote for external mastic
You will get a clear quote before any work starts. It’s based on:
- The type of sealant required
- Any mould that needs treating
- How many areas need sealing
- When we can work, for business premises
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before we start, so you know where you stand.
Asking for a quote
To make quoting easier, let us know:
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- If someone has resealed it before
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.