Greater London · England
External & façade joints in Addiscombe, Greater London
External mastic for Addiscombe, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old sealant gone brittle and cracked
- Weeds or debris growing in open joints
- Movement joints filled with mortar instead of sealant
External mastic for homes and businesses in Addiscombe
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. We work on joints between brick and frames, copings & trims and concrete & block, and people most often call us about moss and dirt in joints with no sealant left and movement joints filled with mortar instead of sealant.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
Your job is guaranteed for a year, as with all our work.
- Location
- Addiscombe (CR0, SE25, CR9)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
External mastic in Addiscombe: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Addington Palace (about 2 miles south-east) are a reminder that the area around Addiscombe has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
As a London address, Addiscombe can be tricky for parking: let us know about parking bays, permits or a driveway. For site and facilities teams at buildings such as Oasis Academy Shirley Park, its movement joints, gutters and trims need looking after like any other building’s.
Addiscombe is about 2 miles north-east of Croydon, in Greater London. Our applicators cover external mastic for householders, landlords and businesses in Addiscombe, as part of our work across Greater London. Our Greater London coverage runs to 764 places, and Addiscombe is one of them. London is on our list too, about 8 miles from Addiscombe.
Here we cover the CR0, SE25 and CR9 postcode area for external mastic. Whether your property is on Grant Road, Capri Road and Coe Avenue or anywhere close by, we can help. Being close to the A232, Addiscombe is simple for us to get to. Nearby, we also carry out external mastic in Shirley Oaks (1 mile east), Ashburton (1 mile north), Woodside (1 mile north), Shirley (1 mile east) and Monks Orchard (1 mile east). Larger places within reach include London (8 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Around Addiscombe
We work in homes and buildings around The Woodside Academy, The Cricketers pub and Ashburton Park and the streets around them. For rail, the closest station is Norwood Junction station, about 1.2 miles north. Other landmarks nearby include St George's Walk (1.5 miles west) and Crystal Palace Museum (2.7 miles north). For a walk, there’s Duppas Hill and Bramley Bank.
Addiscombe: your questions answered
Is Addiscombe in your area for external mastic?
Yes. Our work covers London and the South East, and Addiscombe is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Is parking a problem for a job in Addiscombe?
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.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Do you use backing rod?
That is backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Do you have insurance?
Yes, we’re fully insured for every job we do.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we’ll tell you before we start. Sealant won’t put right:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
- Movement that is more than a sealant joint can take
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
Also near Addiscombe
Other services in Addiscombe
When to call us in Addiscombe
If plants are growing out of a joint, the sealant has generally failed or was never there. Roots and dirt hold water against the wall.
These are the problems we’re asked about most:
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
Letting a property close to Norwood Junction station? Then split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before booking
- How the colour is chosen
- What the cure time is
- Who does the work, and how experienced they are
- The length of the guarantee
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible year round.
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. We prime where the sealant needs it.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Leave it or put it right?
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. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Addiscombe, the repair is bigger than the sealant job would have been.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why book with us
- A sealant colour to suit the surroundings
- You choose the colour before work begins
- Every job guaranteed for a year
- Full insurance on every job
Take a look at our cost guide and our reviews.
What happens on the day
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take 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 Addiscombe. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Tell us about any water getting in
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Ask for a quote
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Related advice
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.