Greater London · England
External & façade joints in Addington, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for Addington, backed by a one-year guarantee. Call for a quick quote.
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
How we handle external mastic in Addington
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 brick movement joints where the sealant has split and old sealant gone brittle and cracked, we can put it right, whatever the surface.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Addington, joints up high may need ladders or other access, which is worth talking through when you book.
Whatever the size of the job, you get the same one-year guarantee in Addington and across Greater London.
- Location
- Addington (CR0, CR2, BR4)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Addington
Can parking be tricky for a visit in Addington?
Parking in Addington, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near West Wickham station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will explain our choice.
How do you reach high-level joints?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding so the bead can stretch.
What is a movement joint?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
How it works
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work starts. The work usually takes a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Addington. 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.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
- Tell us about any water getting in
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details and send photos if you have them.
Advice
Why act early in Addington
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why Addington clients choose us
- Any old sealant cut out fully, not covered over
- Tidy, careful work
- A sealant colour to suit the surroundings
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced or what customers say.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Work for landlords, hotels and businesses
If you manage several properties in or around Addington, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Nearby places to Addington
Also in Addington
Walls and rooflines in Addington
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
Managing a site like Applegarth Academy? Then its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as Church of St Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Addington is about 3 miles south-east of Ashburton, in Greater London. Wherever you are in the CR0 postcode area, our applicators can take on external mastic. Addington is one of 764 towns and villages in Greater London where we work for external mastic. Our London page covers work nearby, about 10 miles away.
Our applicators cover all of CR0, CR2 and BR4 for external mastic. Whether your property is on Lodge Lane, Falconwood Road and Addington Village Road or a nearby road, our applicators can take on the job. Other places close to Addington include Coney Hall (1 mile north), Forestdale (1 mile south), Spring Park (1 mile north), New Addington (1 mile south-east) and Selsdon (1 mile south-west). Further out, we also cover London (10 miles north), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (12 miles north-west), St Pancras (12 miles north) and Shoreditch (12 miles north).
What’s near Addington
We work in homes and buildings around Addington Park and John Ruskin College, among other places. For rail, the closest station is West Wickham station, roughly 1.7 miles north-east. Nearby you’ll also find National Psychosis Unit (1.6 miles north) and St George's Walk (3.1 miles west). Not far away are Bramley Bank and Duppas Hill.
How to look after the new joints
Aftercare is simple:
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Clear growth from the base of walls and joints
- Act on the first splits you see
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Common problems we fix in Addington
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Signs it’s time to call us include:
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
Addington is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- Whether VAT is included
- What preparation is included
- Whether the sealant suits the joint
- How long the guarantee is
How the job changes by surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.