Greater London · England
East Wickham External Mastic
We cover East Wickham for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Gaps where render, brick and frames meet
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
About our external mastic in East Wickham
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a colour to suit. We work on brickwork movement joints, copings & trims and concrete & block, and common reasons people get in touch are panel joints letting water in and joints where the bead has come unstuck.
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.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Place
- East Wickham (DA16, SE18, SE2)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in East Wickham
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. 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. Putting it right early is much less trouble for homes in East Wickham.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we will explain what it covers.
What you get with us
- Domestic, commercial and hotel work
- Any old sealant cut out fully, not covered over
- Sealant colour chosen to suit
- Over 20 years’ experience
Read how sealant jobs are priced and customer reviews.
What the job involves on each surface
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.
When to call us in East Wickham
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. The joint can’t move, so the wall cracks somewhere else instead.
The most common problems we see are:
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
- Brick movement joints where the sealant has split
As a London address, East Wickham can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before booking
- How hidden problems are handled
- How the colour is chosen
- What preparation is included
- What guarantee comes with the work
Walls and rooflines in East Wickham
Historic houses like Danson House (about 1.3 miles south-east) are a reminder that the area around East Wickham has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as St Mary the Virgin, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you let a flat or house near Welling station, split movement joints are easy to miss on a rental until damp shows inside.
East Wickham is about 1 mile north-west of Welling, in Greater London. Whether you’re in the middle of East Wickham or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, and East Wickham is one of them. We also work in London, around 8 miles away.
Work in DA16, SE18 and SE2 is quoted and booked the same way as anywhere else. External mastic is available to properties on Keats Road, Darwin Road and Edison Road. Neighbouring places we cover for external mastic include Falconwood (1 mile south), Shooter's Hill (1 mile west), Blackfen (1 mile south), Plumstead (1 mile north-west) and Avery Hill (1 mile south-west). Within a short drive, we also cover London (8 miles west), City of Westminster (11 miles west), Marylebone (11 miles west), Kensington (13 miles west), St Pancras (10 miles north-west) and Shoreditch (8 miles north-west).
What’s near East Wickham
We work in homes and buildings around Shooters Hill Sixth Form College, Welling School and Shoulder of Mutton Green, among other places. East Wickham has its own railway station: Welling station. Well-known places in the area include Broadway Shopping Centre (2.3 miles south-east) and Greenwich Castle (4.3 miles west). For a walk, there’s The Tarn and Summer Hill.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Nearby places to East Wickham
Also in East Wickham
Your questions about external mastic in East Wickham
Is East Wickham in your area for external mastic?
Yes. Our work covers London and the South East, and East Wickham is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
I let a flat near Welling station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
How long will you be here?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including the preparation. 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 will tell you what we’re using and why.
Can you seal joints between render and window frames?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
How it works
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. For a job in East Wickham, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
Get a quote
If you’re in East Wickham and need external mastic, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Advice
Keeping the joints in good condition
So the new joints stay in good condition:
- Check the sealant is paintable before painting near it
- Walk round the building once a year and look at the joints
- Keep soil, plants and ivy away from the joints
- Get split or bare joints resealed while the damage is small
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- The old material and how stubborn it is
- The type of sealant required
- Whether the work is at height
- The number and length of the joints
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
To help us quote quickly, let us know:
- The rough size of the job
- The type of property
- How we’d reach the joints
- If someone has resealed it before
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or email us.