Greater London · England
Kenley Window Mastic
Window and door frames in Kenley need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Gaps left after new windows were fitted
- Leaking joints at the ends of sills
- Cracked internal joints between frame and plaster
How we handle window mastic in Kenley
Around Kenley we seal all kinds of frames: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you have whistling draughts around closed windows and rushed sealant from a window installation, we can put it right, whatever the surface.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first.
Each job carries a 12-month guarantee.
- Location
- Kenley (CR8, CR2)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
We will not take on work that won’t last, so these are the limits:
- Penetrating damp from a failed cavity tray or render
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Aluminium frames
- Window sills
- Composite doors
- Patio & French doors
- Timber windows & doors
- uPVC windows
Should I try it myself first?
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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Surface by surface
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. The bead is colour-matched to the frame.
Signs you need window mastic in Kenley
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Look out for any of the following:
- Untidy mastic left by window fitters
- White mastic on grey or black frames
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
Schools such as Harris Primary Academy Kenley are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before you book
- What happens if the job turns out different
- How the surfaces are prepared before sealing
- Is VAT in the price?
- What insurance they hold
Windows and doors in Kenley
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking. Historic houses like Addington Palace (about 3.3 miles north-east) are a reminder that the area around Kenley has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you let a flat or house near Kenley station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Kenley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Kenley is about 1 mile south-east of Purley, in Greater London. Whether you are in the middle of Kenley or further out, we cover window mastic for every kind of property. Our Greater London coverage runs to 764 places, and Kenley is one of them. There’s also a page for London, roughly 12 miles from Kenley.
Postcode districts we cover here for window mastic: CR8 and CR2. Whether your property is on Oaks Road, Park Road and Roke Road or a nearby road, we can help. You’ll find Kenley on the A22, so it’s easy for us to get to. Other places close to Kenley include Riddlesdown (1 mile north), Sanderstead (1 mile north-east), Whyteleafe (1 mile south-east), Hamsey Green (1 mile east) and South Croydon (2 miles north). Within a short drive, we also cover London (12 miles north), City of Westminster (13 miles north), Marylebone (14 miles north), Kensington (13 miles north), St Pancras (14 miles north) and Shoreditch (14 miles north).
Landmarks near Kenley
We work in homes and buildings around Dollypers Hill and Riddlesdown Collegiate and the streets around them. Kenley has its own railway station: Kenley station. Well-known places in the area include St George's Walk (3.4 miles north) and Croydon Airport Visitor Centre (2.4 miles north). Open spaces near Kenley include Duppas Hill and Foxley Wood.
Aftercare tips
A little care helps the new joints last. We recommend:
- Walk round the house once a year and look at the joints
- Keep paint and stain on wooden frames in good order
- Paint up to the joint, not over it
- Keep solvents and bleach off the sealant
Most silicone sealants won’t take paint, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
Leave it or put it right?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. 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 Kenley, the repair is bigger than the sealant job would have been.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Why us?
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
- A 12-month guarantee on all work
Take a look at our cost guide or what customers say.
What else we do in Kenley
What we do, step by step
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a handful of frames, longer for a whole house. In Kenley, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we’re working on
Ask for a quote
Getting a quote is simple: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we will take it from there.
Read more
Questions from Kenley
Is parking an issue for window mastic in Kenley?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do window mastic in Kenley?
Yes. Our work covers London and the South East, and Kenley is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
Will new mastic stop draughts?
In many cases. Air often gets in between the frame and the wall, and resealing inside and out closes it.
I rent my home. Can I book you?
Of course. Check with your landlord; we can send the quote to them too.
Are you insured?
Yes. We’re fully insured.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Do you work for landlords and businesses?
Yes. Domestic, commercial and hotel work are all part of what we do.