Greater London · England
External & façade joints in Greenford, Greater London
We cover Greenford for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
- Gaps where render, brick and frames meet
How we handle external mastic in Greenford
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you are dealing with leaking joints around cladding and façade panels and joints where the bead has come unstuck, we can put it right.
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. In a converted house in Greenford, it’s worth checking who is responsible for the outside before booking.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Greenford (UB6, UB5, UB1)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
New sealant cannot fix everything, and we will tell you before we start. Sealant won’t put right:
- Render that is blown, hollow or coming away
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly before you book.
What we seal
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Façade panels
- Concrete & block
Surface by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Common questions in Greenford
Can you help a landlord with a rental near Greenford station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can parking be tricky for a visit in Greenford?
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.
How much does external mastic cost in Greenford?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so it does not stand out.
How long will you be here?
Most jobs take anything from a few hours to several days, depending on the building. Your quote will say how long we expect yours to take.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Never let anyone fill a movement joint with mortar
- Walk round the building once a year and look at the joints
- Keep high-pressure jets off the joints
- Show decorators and builders where the movement joints are
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
Work for landlords, hotels and businesses
If you manage several properties in or around Greenford, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
We work for landlords and agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Why deal with it now?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and does not last, so it pays to do it properly once. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Greenford, the repair is bigger than a sealant job.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Greenford
- We’re fully insured
- Neat joints and a tidy finish
- Rated 4.9 stars on Google
- You choose the colour before work begins
Read our cost guide or what customers say.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
What external mastic looks like in Greenford
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Northolt Manor (about 1 mile north-west) are a reminder that the area around Greenford has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
As a London address, Greenford can be tricky for parking: let us know about parking bays, permits or a driveway. For landlords with property near Greenford station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Managing a site like Oldfield Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Greenford is about 3 miles north-west of Ealing, in Greater London. For external mastic in and around Greenford, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, and Greenford is one of them. London is on our list too, around 11 miles away.
We work across the UB6, UB5 and UB1 postcode area for external mastic. We cover properties on Courthope Road, Oldfield Farm Gardens and Greenford Road. Greenford is on the A4090 and A4127, so it’s easy for us to get to with everything needed for external mastic. We also cover Northolt (1 mile north-west), Perivale (1 mile east), Sudbury (2 miles north-east), Sudbury Hill (2 miles north-east) and Dormers Wells (2 miles south-west). We also work in nearby towns such as London (11 miles east), City of Westminster (9 miles east), Marylebone (9 miles east), Kensington (7 miles south-east), St Pancras (10 miles east) and Shoreditch (12 miles east).
Near you in Greenford
Around Greenford, our work takes us to homes and buildings near Ada Lovelace Church of England High School, The Railway pub and Northala Fields, among other places. Greenford has its own railway station: Greenford station. A little further out are London Designer Outlet (3 miles north-east) and Clementine Churchill Hospital (2 miles north). Not far away are Northala Fields and Litten Nature Reserve.
Places near Greenford
More services for Greenford
How the visit works
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. For a job in Greenford, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
- Move anything stored near the joints
Getting a quote
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and send you a clear quote before we start.