Greater London · England
External & façade joints in Purley, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for Purley, backed by a 12-month guarantee. Ask us for a quote.
- Weathered mastic that no longer stretches
- Cracked joints where brick meets render or frames
- Rigid filler in a joint that should flex
About our external mastic in Purley
For buildings in Purley, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We work on copings & trims, render & cladding joints and brickwork movement joints, and common reasons people get in touch are joints pointed up with cement by mistake and leaking joints around cladding and façade panels.
Outside work in London starts with access: side passages, upper floors and where to park. In Purley, joints up high may need ladders or other access, which is worth talking through when you book.
Each job carries a 12-month guarantee.
- Place
- Purley (CR8, CR2, CR5)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Purley
If plants are growing out of a joint, the sealant has generally failed or was never there. Dirt and roots then trap moisture in the joint.
Any of these means the joints need attention:
- Weathered mastic that no longer stretches
- Brick movement joints where the sealant has split
- Panel joints letting water in
- Weeds or debris growing in open joints
If you live in an older home near St Swithun's, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What your quote should include
- Which colour the sealant will be
- What happens if the job turns out different
- Whether they’re fully insured
- How much experience the applicator has
Purley buildings and the weather
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 3.6 miles north-east) are a reminder that the area around Purley has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For landlords with property near Purley station, outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Christ Church CofE Primary School (Purley), larger buildings have long runs of movement joint that eventually need resealing.
Purley is about 2 miles south-west of Croydon, in Greater London. We carry out external mastic for homeowners, landlords and businesses in Purley. 764 places in Greater London are on our list. There’s also a page for London, roughly 11 miles from Purley.
All of CR8, CR2 and CR5 is within our area for external mastic. Streets in the area include High Street, Church Road and Brighton Road. You will find Purley on the A2022, which makes it straightforward to reach. If you are just outside Purley, we cover Peaks Hill (1 mile north-west), Woodcote (1 mile west), Russell Hill (1 mile north), Roundshaw (1 mile north-west) and Woodcote Green (1 mile west). We also work in nearby towns such as London (11 miles north), City of Westminster (12 miles north), Marylebone (13 miles north), Kensington (12 miles north), St Pancras (13 miles north) and Shoreditch (13 miles north).
Around Purley
Around Purley, our work takes us to homes and buildings near The Jolly Farmers pub, Laleham Lea School and Thomas More Catholic School and the streets around them. There’s a railway station in Purley itself: Purley station. A little further out are Purley War Memorial Hospital (under half a mile north-east) and St George's Walk (2.7 miles north). For a walk, there’s Duppas Hill and Foxley Wood.
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. 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.
What the job involves on each surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Aftercare tips
To keep the joints looking good and working properly:
- Never let anyone fill a movement joint with mortar
- Clear growth from the base of walls and joints
- Keep high-pressure jets off the joints
- Leave the joints unpainted unless we’ve said otherwise
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Landlord and commercial work in Purley
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Towns and villages near Purley
What else we do in Purley
Common questions in Purley
I let a flat near Purley station. Can you help?
Yes. We work for landlords and agents as well as homeowners. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Can you do external mastic in Purley?
Yes, Purley is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Should I point up the gap in my brickwork?
No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin.
How long will you be here?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer, and we will tell you how long to expect.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Copings & trims
How it works
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes a few hours for a handful of joints, longer for a whole elevation from start to finish. In a London area like Purley, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
Ask for a quote
For external mastic in Purley, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before work begins.