Greater London · England
External Mastic in Shirley Oaks
Problem with your movement joints in Shirley Oaks? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Water getting into walls through failed joints
- Rigid filler in a joint that should flex
- Weeds or debris growing in open joints
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. It generally takes anything from a few hours to several days, depending on the building. For a job in Shirley Oaks, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
Ask for a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
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External mastic in Shirley Oaks
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. Common call-outs are for joints pointed up with cement by mistake and moss and dirt in joints with no sealant left, on brickwork movement joints, joints between brick and frames and copings & trims.
Outside work in London starts with access: side passages, upper floors and where to park. In Shirley Oaks, joints up high may need ladders or other access, which is worth talking through when you book.
A one-year guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Shirley Oaks (CR0, SE25, CR9)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Shirley Oaks
Can parking be tricky for a visit in Shirley Oaks?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you do external mastic in Shirley Oaks?
Yes. We work across London and the South East, and Shirley Oaks is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear price.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you guarantee your work?
Yes, always. There’s a 12-month guarantee on every job.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Common problems we fix in Shirley Oaks
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
Keep an eye out for these signs:
- Joints with sealant missing in places
- Failed seals between different materials
- Water getting into walls through failed joints
- Plants rooting in failed movement joints
Letting a property close to Elmers End station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Is VAT in the price?
- What the cure time is
- Who does the work, and how experienced they are
- How the joint is cleaned and prepared
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Look over the joints every year, ideally after winter
- Get split or bare joints resealed while the damage is small
- Show decorators and builders where the movement joints are
- Keep high-pressure jets off the joints
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
External mastic in Shirley Oaks: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Addington Palace (about 1.8 miles south-east) nearby, there’s older building stock in the area around Shirley Oaks as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you look after a building such as Oasis Academy Shirley Park, its movement joints, gutters and trims need looking after like any other building’s. In the older streets around Shirley Methodist Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Shirley Oaks is about 2 miles north-east of Croydon, in Greater London. Whether you are in the middle of Shirley Oaks or further out, external mastic is available for homes and businesses alike. Shirley Oaks is one of 764 towns and villages in Greater London we cover. 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. Whether your property is on Poppy Lane, Baring Road and Craven Road or anywhere close by, we can help. Main roads around Shirley Oaks include the A232. Other places close to Shirley Oaks include Shirley (1 mile east), Monks Orchard (1 mile east), Addiscombe (1 mile west), Ashburton (1 mile north-west) and Woodside (1 mile north-west). We also work in nearby towns such as London (8 miles north), City of Westminster (10 miles north-west), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
What’s near Shirley Oaks
We work in homes and buildings around St. John's Church of England Primary School, Ashburton Park and The Cricketers pub. The closest station to Shirley Oaks is Elmers End station, about 1.2 miles north. Nearby you’ll also find Crystal Palace Museum (2.8 miles north) and National Psychosis Unit (1.1 miles east). Green spaces nearby include Bramley Bank and Duppas Hill.
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What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Damp that isn’t coming from the joint
- Subsidence or other structural problems
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Where we work in Shirley Oaks
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
Surface by surface
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.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Leave it or put it right?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. 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 Shirley Oaks, the repair is bigger than the sealant job would have been.
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why book with us
- 20+ years of sealant experience
- Arbo and Everbuild products
- Neat joints and a tidy finish
- We’re fully insured
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.