Greater London · England
External & façade joints in Shirley, Greater London
External mastic in Shirley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
External mastic in Shirley, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We work on brickwork movement joints, joints between brick and frames and copings & trims, and people most often call us about failed seals between different materials and panel joints letting water in.
Outside work in London starts with access: side passages, upper floors and where to park. In Shirley, joints up high may need ladders or other access, which is worth talking through when you book.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Place
- Shirley (CR0, SE25, CR9)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Shirley
Can you do external mastic in Shirley?
Yes. Our work covers London and the South East, and Shirley is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Elmers End station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
How long should I leave it?
Cure times vary by product and the temperature. Before we leave, we will tell you the cure time.
Can you match the colour of my brickwork?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so it doesn’t stand out.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. If it has already been filled, we can generally cut it out and reseal it.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
DIY versus a professional finish
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.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How the job changes by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
Common problems we fix in Shirley
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Any of these means the joints need attention:
- Failed seals between different materials
- Sealant pulling away from one side of the joint
- Rain getting behind render or cladding at a joint
- Weeds or debris growing in open joints
If you let a flat or house near Elmers End station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- Which colour the sealant will be
- What happens if the job turns out different
- Whether the sealant suits the joint
- The length of the guarantee
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Walk round the building once a year and look at the joints
- Get split or bare joints resealed while the damage is small
- Clear growth from the base of walls and joints
- Keep movement joints as flexible joints, not mortar
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
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.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Movement that’s more than a sealant joint can take
- Walls that need new movement joints cut into them
- Failed render or damaged cladding panels
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
How it works
The work is kept neat and contained to the area we’re working on. The job usually takes a few hours for a handful of joints, longer for a whole elevation, and we explain the cure time before we leave. For a job in Shirley, 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 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.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Tell us if parking is tricky
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
How to get a quote
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Related advice
External mastic in Shirley: local notes
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. With historic houses such as Addington Palace (about 1.7 miles south) nearby, there’s older building stock in the area around Shirley as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to St George The Martyr Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. Shirley is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Shirley is about 2 miles north-east of Croydon, in Greater London. Anywhere in CR0, we cover external mastic for homes and businesses. Shirley is one of 764 places in Greater London where we work for external mastic. We also work in London, around 8 miles away.
All of CR0, SE25 and CR9 is within our area for external mastic, from the main roads to the quietest streets. Local streets include Poppy Lane, Homer Road and Craven Road. Main roads around Shirley include the A232, so getting to you is simple. Neighbouring places we cover for external mastic include Monks Orchard (1 mile north), Shirley Oaks (1 mile west), Addiscombe (1 mile west), Ashburton (1 mile north-west) and Woodside (1 mile north-west). Larger places within reach include London (8 miles north), City of Westminster (10 miles north-west), Marylebone (10 miles north-west), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
What’s near Shirley
We work in homes and buildings around The Cricketers pub, Ashburton Park and Orchard Way Primary School, among other places. Shirley’s nearest station is Elmers End station, about 1.2 miles north. Other landmarks nearby include Crystal Palace Museum (2.8 miles north) and St George's Walk (2 miles west). For a walk, there’s Duppas Hill and Bramley Bank.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last. In a flat in Shirley, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
Why book with us
- Homes, businesses and hotels
- Anti-fungal sanitary silicone in wet areas
- Sealant colour chosen to suit
- We leave the area clean and tidy