Greater London · England
Window & door mastic in South Bank, Greater London
Window mastic for South Bank and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
- Cracked or shrunken mastic around the frame
Landlord and commercial work in South Bank
If you manage several properties in or around South Bank, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Window mastic for homes and businesses in South Bank
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on window sills, patio & French doors and timber windows & doors, and people most often call us about damp patches on the reveal after heavy rain and mastic that has split away from the wall.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
You get a 12-month guarantee, the same in South Bank as everywhere else we work.
- Location
- South Bank (SE1, WC2E, WC2N)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common problems we fix in South Bank
Mastic ages in the weather. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Look out for these signs:
- Cracked internal joints between frame and plaster
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
- White mastic on grey or black frames
If you live in an older home near St John's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- How hidden problems are handled
- How long to leave it before use
- How the joint is cleaned and prepared
- Who turns up on the day
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What window mastic looks like in South Bank
Historic houses like Benjamin Franklin House (about 0.4 miles north-west) are a reminder that the area around South Bank has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
For site and facilities teams at buildings such as Oasis Academy Johanna, the mastic around its windows and doors needs looking after like any other building’s. As a London address, South Bank can be tricky for parking: let us know about parking bays, permits or a driveway.
South Bank is about 1 mile west of London, in Greater London. Whether you are in the middle of South Bank or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. South Bank is one of 764 towns and villages in Greater London we cover for window mastic.
Postcode districts we cover here for window mastic: SE1, WC2E and WC2N. You’ll find streets such as York Road, Spur Road and Lower Road, all of which we cover. You’ll find South Bank on the A301 and A302, which makes it straightforward to reach with everything needed for window mastic. We also cover the places around South Bank: Waterloo (1 mile south-east), Adelphi (1 mile north-west), Charing Cross (1 mile north-west), Temple (1 mile north-east) and Aldwych (1 mile north). Within a short drive, we also cover Kensington (4 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
What’s near South Bank
Locally, jobs take us to homes and businesses close to Jubilee Gardens, The Hole In The Wall pub and The BFI Reuben Library and the streets around them. Other local landmarks include St Andrew's and St John's Church of England Primary School (within half a mile east) and London Nautical School (under half a mile north-east). South Bank has its own railway station: London Waterloo station. Other landmarks nearby include Florence Nightingale Museum (under half a mile south) and Royal Waterloo Hospital for Children and Women (less than half a mile north-east). The countryside around South Bank includes Barnsbury Wood and St. James's Park Lake.
Nearby places to South Bank
What else we do in South Bank
How the job changes by surface
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
Patio & French doors
Not every patio door leak is a mastic problem: blocked drain slots, worn brush seals and threshold details can let water in too. We check before we reseal.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Rotten timber, which needs a joiner first
- A sash or casement that won’t close properly
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.
What we seal
- Composite doors
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Window sills
- Aluminium frames
What we do, step by step
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours for a few frames, or a day or more for a whole house for a typical job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in South Bank. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, call 0345 464 0079 or send us an email.
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South Bank: your questions answered
I let a flat near London Waterloo station. Can you help?
Yes. We work for landlords and agents as well as householders. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover South Bank for window mastic?
Yes. We work across London and the South East, and South Bank is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear quote.
Does the work come with a guarantee?
Yes. Our one-year guarantee covers every job.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit. You will get a timescale with the quote.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Can you reach windows above the ground floor?
Yes, where it’s safe. For high or awkward windows, we will tell you what access is needed.
What happens if it’s left?
Working on frames from a ladder with a sealant gun is not easy, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Leaving a failed joint normally makes the job bigger, not smaller. If you are not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why us?
- White, clear, grey or another colour, product permitting
- We are fully insured
- One-year guarantee on every job
- You choose the colour before work begins
Take a look at what affects the cost or what customers say.