Bankside mastic sealing
Our CSCS-carded applicators take on mastic sealing for building owners, managing agents and housing associations in Bankside and the surrounding area. Send photos or drawings for a fixed quote.
- Open joints in brickwork or panels
- No planned programme for sealant
- Leaks at window and door perimeters
Mastic sealing across Bankside
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Common questions from Bankside clients
Can you work in a London building with booked loading and goods-lift slots?
Yes, we plan every London job around the building’s own access rules. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly. We allow for the ULEZ, which covers every borough
Can you quote for a block close to London Blackfriars station?
Yes, we work for agents, landlords and housing associations with blocks of every size. We work to your notice and access arrangements.
How long do sealant joints last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
Who decides which product is used?
The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Can you reseal a whole block or estate?
Yes. Each building is inspected, quoted and scheduled in turn starting wherever is most urgent.
Will you just go over the old sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
Mastic sealing in Bankside
Different joints need different sealants. Low-modulus neutral-cure silicone suits many window perimeters and external movement joints, while hybrid polymer sealants grip many materials and are often paintable. We will confirm the colours available for the specified product. If you’re dealing with water getting in round frames after rain and mastic failing across several blocks on an estate, we can put it right, on communal kitchens and washrooms, balcony and threshold joints and communal entrances and stairwells alike. Whoever orders the work in Bankside, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. We work to the agent’s notice and access plan, so residents know what’s happening.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.
- Location
- Bankside (SE1, EC4Y, EC4V)
- Wider area
- Greater London
- Guarantee
- 12 months on every job
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
What we’re called out for in Bankside
Sunlight and weather break mastic down over time. The surface chalks, the body stiffens and cracks appear most of all on the sunniest and most exposed elevations.
It’s worth sending us details if you spot any of the following:
- No planned programme for sealant
- Water getting in round frames after rain
- Movement joints with sealant missing
- Occupiers reporting cold air round windows
For agents with blocks near London Blackfriars station (under half a mile north-west of Bankside), a block-wide mastic programme deals with frames, balconies and entrances in one go.
Comparing quotes
- Whether their applicators hold CSCS cards
- The named product and why it was chosen
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- What the guarantee covers, and for how long
Towns and villages near Bankside
More services for Bankside
On site: what to expect
Tell us your site hours and access windows and we will plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. All of Greater London is in the ULEZ, and kerbside space in Bankside can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- We inspect the joints, building by building, and record what has failed and why.
- We send a fixed quote that sets out the joints, the products and the programme.
- Dates, areas and access are agreed so residents or tenants can be told in advance.
- Old sealant is stripped and each face prepared back to firm material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Before we start on site
- Tell us what induction or permit system the site runs
- Arrange parking or a loading space
- Share the asbestos register for older buildings
Getting a fixed quote
Tell us about the building, the joints and when you need the work done, and we’ll put a fixed quote together. To get it moving, ring 01277 525 020 or email a schedule or drawings.
Read more
Doing it in-house
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.
Redoing a failed joint normally costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.
Planned mastic for Bankside portfolios
Blocks in London are typically run by managing agents, landlords or housing associations, with residents to notify and access to arrange. We fit the programme to your notice periods. The 2 miles around Bankside include two care or nursing homes. Care home owners need frame and external mastic kept sound without unsettling residents.
For a school such as London Nautical School, perimeter mastic on windows and doors is a holiday job. For owners of several units at places like Grand Vitesse Industrial Estate, which lies south of Bankside, one programme can deal with frame and external mastic across the lot.
Bankside is about 1 mile north of London, in Greater London. Looking for mastic sealing in Bankside? We can help, as we do across Greater London. 764 places across Greater London fall within our area, Bankside among them.
Commercial sites across SE1, EC4Y and EC4V are covered. Buildings on Bear Lane, Bush Lane and Swan Lane are within our area. Being close to the A201 and A300, Bankside is straightforward for us to reach. If your building is just outside Bankside, we cover Blackfriars (1 mile north-west), Temple (1 mile north-west), Temple Bar (1 mile north-west), Waterloo (1 mile south-west) and Smithfield (1 mile north). Nearby towns on our patch include Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (5 miles north-west), Ruislip (14 miles west), Brompton (3 miles west) and Stockwell (3 miles south).
Near you in Bankside
We work on buildings around St Mary-at-Hill, Bernie Spain Gardens and St Andrew's and St John's Church of England Primary School. Nearby too are Barts Health Archives (0.6 miles north), The Cathedral School of St Saviour and St Mary Overy (0.5 miles south-east) and Founders Arms (under half a mile west). Bankside has its own railway station: London Blackfriars station. Well-known places in the area include Royal Waterloo Hospital for Children and Women (0.6 miles west) and Gabriel's Wharf (less than half a mile west). Green spaces nearby include Ludgate Hill and Barnsbury Wood.
How the job changes by surface
Estate-wide resealing programmes
A programme can start with the worst buildings and work down. Quotes can be per block or for the full programme.
Planned maintenance
Planned resealing replaces emergency callouts and spreads the work.
Honest limits
Some faults sit outside our scope, and we say so rather than covering them up:
- Misted or failed double-glazed units
- Masonry that has broken away beside the joint
- Roof leaks, gutters or failed flashings that aren’t sealant joints
If you’re not sure, just ring 01277 525 020 or email drawings and photos and we will give you a straight answer before you book.
Surfaces we seal
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- Shopfronts below residential blocks
- External wall and movement joints
- Communal kitchens and washrooms
Why deal with it now?
Sealing over failed mastic looks tidy for a while. It won’t grip the old sealant and soon comes away. Cutting out and resealing properly does it once. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote and we’ll explain how it’s made up.
Why us?
- One phone line for London, the South East and Scotland
- Colours chosen to suit frames, cladding or finishes where possible
- Our applicators hold CSCS cards
- Colour options checked against the specified product
See our cost guide or how we’re accredited.