Greater London · England
External Mastic in West Wickham
External mastic for West Wickham and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracked joints where brick meets render or frames
- Failed sealant between panels on a façade
- Movement joints filled with mortar instead of sealant
Quotes for external mastic in West Wickham
The quote reflects the job in front of us. We look at:
- Any mould that needs treating
- The size of the job
- The type of sealant required
- How easy the joints are to reach
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
What we need to know
To make quoting easier, please include:
- How we’d reach the joints
- Where the job is, and your postcode
- Roughly how big the job is
- Whether it’s a home or a business
Every job is quoted individually, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details and send pictures if you have them.
How we handle external mastic in West Wickham
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we will confirm what access is needed. Common call-outs are for damp patches traced to an open external joint and old sealant gone brittle and cracked, across façade panels, brickwork movement joints and joints between brick and frames.
Outside work in London starts with access: side passages, upper floors and where to park. In West Wickham, joints up high may need ladders or other access, which is worth talking through when you book.
Every job is covered by our one-year guarantee, wherever you are in Greater London.
- Place
- West Wickham (BR4, CR0, BR3)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Also near West Wickham
What else we do in West Wickham
Different surfaces, different methods
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it before sealing.
Do you need external mastic in West Wickham?
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint and speed up the damage.
The problems people generally mention when they call include:
- Failed sealant between panels on a façade
- Rigid filler in a joint that should flex
- Joints with sealant missing in places
- Failed seals between different materials
West Wickham is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Questions to ask before booking
- Is the old sealant removed completely?
- What happens if the job turns out different
- Are they insured?
- What guarantee comes with the work
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What sealant work can’t fix
To be straight with you, some problems need a different trade:
- Cracks in the bricks or render themselves, away from the joints
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in West Wickham
- Concrete & block
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
What happens if it’s left?
A failed movement joint lets water into the wall. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why choose Mr Mastic in West Wickham
- We leave the area clean and tidy
- Arbo and Everbuild products
- Homes, businesses and hotels
- A sealant colour to suit the surroundings
See our cost guide or our reviews.
What external mastic looks like in West Wickham
Historic houses like Addington Palace (about 1.6 miles south-west) are a reminder that the area around West Wickham 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. 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.
Managing a site like Oak Lodge Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you let a flat or house near West Wickham station, outside joints that have cracked can let damp into a rental, so check them between lets.
West Wickham is about 2 miles south of Beckenham, in Greater London. Whether you’re in the middle of West Wickham or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 764 towns and villages across Greater London. For nearby work, see our London page, about 9 miles away.
Every address in BR4, CR0 and BR3 is covered for external mastic. Whether your property is on Ash Road, Kent Road and Oak Avenue or a nearby road, our applicators can take on the job. If you are just outside West Wickham, we cover Coney Hall (1 mile south), Spring Park (1 mile west), Eden Park (1 mile north), Hayes (1 mile east) and Addington (1 mile south). Further out, we also cover London (9 miles north), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (12 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
What’s near West Wickham
In West Wickham, that means homes and buildings near Millers Pond, Langley Park School for Girls and The Wheatsheaf pub and the streets around them. West Wickham has its own railway station: West Wickham station. Other landmarks nearby include The Mall (2.4 miles north-east) and National Psychosis Unit (0.6 miles north-west). Green spaces nearby include Duppas Hill and Bramley Bank.
West Wickham questions
Can you help a landlord with a rental near West Wickham station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Is West Wickham in your area for external mastic?
Yes, West Wickham is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Can you reach joints on upper floors?
It depends on the building. We work on joints that can be reached safely. Give us some details and we will confirm the access.
Do you do commercial work?
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.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
What happens on the day
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a few hours to a few days, depending on the length of joint and the access. In West Wickham, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or send us an email.