Expansion Joint Sealing in Kensington
Expansion and movement joint sealing in walls, decks and floors in Kensington. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Expansion joints split through the centre of the bead
- Car park joints leaking onto vehicles below
- Water getting into the wall through a failed joint
Need expansion joint sealing in Kensington?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
For managing agents and facilities managers
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules.
Expansion joint sealing in Kensington
Few joints take as much punishment as those in a car park. Tyres load the edges, and de-icing salts and water work into any gap, so failed seals soon lead to leaks onto the level below and broken edges. A sealant suited to traffic and the expected movement goes in, phasing bays so the car park can stay in use. Most enquiries involve car park joints leaking onto vehicles below and arrises breaking up along floor joints, on car park decks and ramps, podiums and floor movement joints and cladding panel joints. Most enquiries from Kensington start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.
Around Kensington, as across London, joints are under constant load, from basement car parks and loading bays to podium decks and busy mall floors. When a joint fails, grit and water get in and the arrises start to break up, so it pays to act early.
Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- Kensington (W11, W8, W14, SW7)
- Region
- Greater London
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
What happens if it’s left?
Re-sealing with the same product that failed is often a false economy. If the joint is too narrow or the product wrong for the movement, it needs a different approach, and we’ll say so before quoting. In a London building, a failed joint rarely affects only one party. Dealing with it early is simpler for everyone.
No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Why choose Mastic Doctor in Kensington
- Our applicators hold CSCS cards
- Sealing commercial buildings since 2005
- Old sealant cut out, never sealed over
- Colour agreed before work starts
What we can’t put right
Not every problem is a sealant problem, and we’d rather tell you before you spend money. These need a different solution:
- Damaged metal nosings or cover plates over a joint
- Concrete or masonry repairs along the arrises
- Cracking or settlement that calls for an engineer’s assessment
If you are not sure, just phone 01277 525 020 or send details through our quote form and we’ll give you a straight answer.
Joints and surfaces we work on
- Podiums and floor movement joints
- Car park decks and ramps
- Precast concrete panel joints
- Blockwork control joints
- Brickwork movement joints
- Cladding panel joints
Nearby places to Kensington
Other services in Kensington
Expansion joint sealing around Kensington: points for this area
London car parks, loading bays and podium decks often can’t close for long, so joints are sealed in sections with each area handed back once cured. At least three named trading, business or retail sites lie within about 3 miles of Kensington. That puts plenty of warehouse floors, service yards and car parks close by, all with joints under traffic.
On a site such as Berghem Mews Business Village, which lies west of Kensington, the movement joints are in car park slabs, paving and building elevations. Campuses like University of Westminster (less than half a mile south-west of Kensington) mix old and new buildings, with movement joints wherever they meet.
Kensington is about 5 miles west of London, in Greater London. We cover commercial sites throughout Kensington, whether it’s a single job or part of a planned programme. Kensington is one of 764 places in Greater London on our list.
Anyone looking for expansion joint sealing in W11, W8, W14 and SW7 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on Kensington High Street, Edwardes Square and Somerset Square or close by, we can quote for movement joints. Kensington sits on or close to the A402 and B316, useful when we plan access and materials. We also cover Holland Park (1 mile north), Notting Hill (1 mile north), Shepherd's Bush (1 mile west), Notting Dale (1 mile north) and White City (1 mile north-west). A short drive away, we cover London (5 miles east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles north-east). Kensington ranks among the main centres of Greater London, with offices, shops, schools and other public and commercial buildings, and we cover them all.
Local landmarks in Kensington
We work on buildings around Holland Park, Scarsdale Tavern and Holland Park School, among other places. Also close by are Kensington School (0.5 miles east) and Abdus Salam Library (1 mile east). There’s a railway station in Kensington itself: Kensington Olympia station. Well-known places in the area include Kensington Arcade (less than half a mile east) and London Museum (0.7 miles north-east). Green spaces nearby include WWT London Wetland Centre and The Long Water.
How a job runs
Diagnose, treat, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and the job ends with a walk round and sign-off. For a job in Kensington, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.
- First, the joints are inspected for width, movement and the type of failure.
- You get a fixed quote with the product and its movement capability stated.
- The failed seal is removed and both faces are cleaned until sound and dry, flagging any broken edges that need repair before sealing.
- We control the depth with backing rod or, in shallow joints, bond-breaker tape.
- Primer goes on where the manufacturer specifies it, followed by the sealant, which is then tooled off.
- Each joint is inspected and handed over with our 12-month guarantee.
Getting the site ready
- Send asbestos survey details if the building is pre-2000
- Point out any areas we must not close
- Share your working hours and any access restrictions
Getting a fixed quote
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.
Related advice
Different surfaces, different methods
Joints between different materials
Hybrid or MS polymer sealants bond to many substrates. The choice depends on the substrates and how much the joint moves, and confirm it in the quote.
Podium joints
Podium joints often sit within a waterproofing system. Where the specification calls for sealant, we reseal, and tell you if the problem looks like the waterproofing below.
Common problems we fix in Kensington
With no backing rod or bond-breaker in place, sealant grips the base of the joint too. Sealant fixed to the base and sides can’t flex, so it tears so backing is set before sealing.
Things that typically lead to an enquiry:
- Sealant pulling off the joint face
- Movement joints with split or torn sealant
- Joints packed with grit and debris
- Leaks through car park deck joints onto the level below
Phasing is what makes joint work possible on busy sites such as Stable Way Industrial Estate (1.3 miles north-west of Kensington): one bay, aisle or car park row at a time.
What to look for in a quote
- Their public liability cover
- Whether old or failed sealant will be cut out, not overlaid
- Are they CHAS accredited or on Constructionline?
- Whether their applicators hold CSCS cards
Questions we are asked in Kensington
Can you work in a London building with booked loading and goods-lift slots?
Yes. Inductions, permits and timed loading are routine for us in London. Share the building’s contractor rules and we’ll work to them. We allow for the ULEZ, which covers every borough
Is hospital work, at somewhere like Cromwell Hospital, something you do?
Yes. Healthcare sites are among the places we work. We follow the site’s permits, sign-in and infection-control procedures in every area.
What about RAMS and site documents?
Each site asks for different documents, so tell us what you need and we’ll confirm it when we quote.
When is resealing likely to be due?
It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.
Can the sealant be colour-matched?
It depends on the product specified. Some ranges are wide, others limited, so we’ll confirm the colours available for the specified product with the quote.
Can the building stay open while you work?
In the majority of cases, yes. Phased work can be planned so areas stay in use.
Do you have public liability insurance?
Yes. Mastic Doctor is fully insured, public liability included.