Greater London · England
Becontree Heath External Mastic
Problem with your movement joints in Becontree Heath? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Damp patches traced to an open external joint
- Joints with sealant missing in places
- Panel joints letting water in
How we handle external mastic in Becontree Heath
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. We work on copings & trims, joints between brick and frames and concrete & block, and people most often call us about failed seals between different materials and weeds or debris growing in open joints.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. In a converted house in Becontree Heath, it’s worth checking who is responsible for the outside before booking.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Becontree Heath (RM8, RM10, RM7)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Don’t let climbing plants root in the sealant
- Fix overflowing gutters above sealed joints
- Make sure movement joints are not pointed over
- Tell anyone working on the walls about the movement joints
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick.
What affects the quote in Becontree Heath
There’s no set price list, because no two jobs are the same. The quote depends on:
- The type of sealant required
- The old material and how stubborn it is
- Whether there’s mould to deal with
- The number of rooms or windows
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- The address or postcode of the job
- Pictures of the joints, sent by email
If you are in Becontree Heath and need external mastic, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
What we do, step by step
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Becontree Heath. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
Getting a quote
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Related advice
What external mastic looks like in Becontree Heath
London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking. With historic houses such as Hare Hall (about 2.9 miles north-east) nearby, there’s older building stock in the area around Becontree Heath as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
As a London address, Becontree Heath can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you let a flat or house near Chadwell Heath station, split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near Hartley Brook Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Becontree Heath is about 1 mile south-west of Romford, in Greater London. If you need external mastic in Becontree Heath, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We are based in Crawley and cover Greater London. Becontree Heath is one of 764 places in Greater London where we work for external mastic. There’s also a page for London, about 12 miles away.
Jobs for external mastic in RM8, RM10 and RM7 works the same way as everywhere else we cover. Streets in the area include Bull Lane, Wood Lane and Crow Lane. If you’re just outside Becontree Heath, we cover Rush Green (1 mile east), Chadwell Heath (1 mile north-west), Becontree (1 mile south), Romford (1 mile north-east) and Dagenham (2 miles south). We also work in nearby towns such as London (12 miles south-west), City of Westminster (14 miles west), Marylebone (13 miles west), St Pancras (12 miles west), Shoreditch (10 miles west) and Walthamstow (8 miles west).
Near you in Becontree Heath
Locally, jobs take us to homes and businesses close to Eastbrook pub, William Bellamy Primary School and St. Edward's Church of England School, among other places. The closest station to Becontree Heath is Chadwell Heath station, about 1.1 miles west. Well-known places in the area include Rush Green Hospital (1 mile east) and The Brewery (1.4 miles north-east). Not far away are The Chase Nature Reserve.
Why act early in Becontree Heath
A failed movement joint lets water into the wall, behind render and cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Becontree Heath, the repair is bigger than a sealant job.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why book with us
- Anti-fungal silicone where joints get wet
- Rated 4.9 stars on Google
- You choose the colour before work begins
- Arbo and Everbuild products
Read our cost guide or what customers say.
How the job changes by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Common questions in Becontree Heath
Is parking a problem for a job in Becontree Heath?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Do you work for landlords with property near Chadwell Heath station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
How often do external joints need resealing?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Pointing it stops it working. A flexible sealant is the right fill.
How long will you be here?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. Your quote will say how long we expect yours to take.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Nearby places to Becontree Heath
Also in Becontree Heath
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
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.