City of London expansion joint sealing
Expansion and movement joint sealing in walls, decks and floors throughout City of London and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Car park joints leaking onto vehicles below
- Weathered movement joint sealant that no longer flexes
- Rain penetration at brick or block movement joints
Expansion joint sealing across City of London
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Expansion joint sealing in City of London, done properly
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; water dripping through to the deck below is often the first sign. We reseal deck and ramp joints with a trafficable sealant chosen for the movement, phasing bays so the car park can stay in use. The enquiries we see most involve joints packed with grit and debris and weathered movement joint sealant that no longer flexes, on cladding panel joints, car park decks and ramps and blockwork control joints. A specialist sealant contractor works differently from a general builder: on jobs in City of London, preparation and product choice get the time they need.
Floor and movement joints in London take heavy use: car park decks, loading bays, shopping centre malls and podiums over occupied space. A failed joint lets water and debris in, and the edges soon spall.
Our workmanship is guaranteed for 12 months, in City of London as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Location
- City of London (EC4V, EC1A, EC2M, EC2Y)
- Region
- City of London
- Guarantee
- 12 months on every job
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
City of London: questions and answers
Would you work within a site like St Bartholomew's Hospital?
Yes, provided the work is planned with the site’s estates team. Work is phased so departments keep running, under the site’s own rules.
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we will plan accordingly. We allow for the ULEZ, which covers every borough
Do you offer coloured sealant?
In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We confirm what’s available for the specified product when we quote.
Which sealant will you use?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Can you seal joints in cold or wet weather?
Sealing onto a damp surface leads to adhesion failure so we’d rather rearrange than seal in the rain. The work is simply moved to the next suitable day.
Are expansion joints and movement joints the same thing?
Put simply, it’s a planned break in a wall, slab or deck so the materials can move. Expansion joint is a name often used for the same thing.
Can one quote cover more than one building?
Yes. A group of buildings can go on one quote, with one point of contact.
What the job involves on each surface
Cladding panel joints
Access to cladding joints is agreed before the price is fixed. Photos taken near the joints help us price accurately, or we visit if they don’t show enough.
Joints between different materials
Hybrid or MS polymer sealants bond to many substrates. We pick the product for the materials and the movement.
Looking after the joints
For the best life from the joints:
- Raise snow-clearing blades over deck joints where possible
- Avoid parking heavy plant or pallets on joint lines
- Sweep decks, ramps and floors so grit doesn’t collect in the joints
- Look over external and deck joints after a hard winter
Keep wheels, feet and water off new joints until the sealant has cured. How long that takes depends on the product, the temperature and the depth of the joint, and we confirm it for each area before we leave. Barriers left in place until then protect the finish.
Joints sealed at the same time generally fail around the same time. Inspecting the whole run is worth the effort. We can suggest an order, worst joints first.
Also near City of London
What else we do in City of London
Joints that move: notes for City of London
In London, decks, bays and service yards usually have to keep running, which is why we work a few bays at a time. The 3 miles around City of London take in at least three named trading estates, business parks or retail parks. Their warehouses, yards and car parks are exactly where joints take the most punishment.
Business parks such as Southwark Bridge Business Centre (to the south of City of London) have car parks, paved areas and long brick and panel elevations, all with movement joints. For a centre such as Brunswick Centre, 1.5 miles north-west of City of London, the service yard and car park joints typically need attention first.
City of London is about 1 mile north of London, in City of London. We send applicators to City of London for movement joints. We work across 7 places in City of London, large and small.
Work on movement joints is covered throughout EC4V, EC1A, EC2M and EC2Y, for business premises of every kind. Among the streets we cover are Aldermanbury Square, Monkwell Square and Paternoster Square. You’ll find City of London on or near the A1 and A3, so getting applicators and materials to site is simple. Sites close to City of London are covered too, including Barbican Estate (1 mile north), Bishopsgate (1 mile east), Finsbury (1 mile north), Aldgate (1 mile east) and St Luke's (1 mile north).
Local landmarks in City of London
Locally, jobs take us to sites close to St Mary-at-Hill, Prior Weston Primary School and Children's Centre and Golden Fleece pub, among other places. You’ll also find Central Foundation Boys' School (0.8 miles north), Barts Health Archives (less than half a mile north-west) and St Alphage Garden (less than half a mile north). There’s a railway station in City of London itself: London Cannon Street station. Well-known places in the area include Gabriel's Wharf (0.8 miles south-west) and London Mithraeum (less than half a mile south). Green spaces nearby include St. James's Park Lake and Barnsbury Wood.
Why deal with it now?
Patching the worst lengths of a joint can make sense short term. But if the rest of the run is the same age and product, it’s normally not far behind, and a second visit means paying for access again. We can price a patch and a full reseal side by side. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote.
Why clients in City of London choose us
- Fully insured, including public liability cover
- Old sealant cut out, never sealed over
- 12-month guarantee on workmanship
- Commercial sealant work since 2005
Take a look at how commercial sealant jobs are priced or our accreditations and insurance.
What affects the price in City of London
We price every job individually. The main factors are:
- Quantities, in metres or numbers
- How much existing material needs removing
- How accessible the joints are
- The size and state of each joint
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote, and you’ll have a fixed figure to work with.
Sending details for a quote
We can often quote from photographs and a few details. Please tell us:
- The postcode of the building
- Clear photos of the problem areas
- The product your specification calls for
- Anything awkward about access or site hours
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To start the process, call 01277 525 020 or email the details over.
When to call us in City of London
Weathering wears down sealant on exposed elevations and decks. In time the bead chalks, stiffens and cracks, so it can’t follow the movement any more.
These are often picked up first by site or facilities staff:
- Layers of sealant in a movement joint
- Spalled or broken joint edges in floors and decks
- Expansion joints split through the centre of the bead
- Expansion joints filled with dirt and stones
For estates staff at a university like Queen Mary's University West Smithfield Campus, less than half a mile to the north-west of City of London, building and paving joints are part of the planned maintenance list.
What your quote should include
- How the existing material will be dealt with
- Proof of insurance
- How long is the guarantee, and what does it include?
- Do they follow the manufacturer’s priming guidance?
On site: what to expect
Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and work section by section so the rest of the building stays in use. For a job in City of London, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we will schedule to suit.
- We look at the joints, their width and how they’ve failed.
- 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.
- Backing rod goes in at the right depth, or bond-breaker tape where the joint is shallow.
- Where the maker calls for primer, it’s applied first, then the bead goes in and is tooled to a concave finish.
- Finished joints are checked and backed by our 12-month guarantee.
What we need from you
- Send your site hours and access windows
- Move anything stored against the joints
- For older buildings, check the asbestos register before work
Request a quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, speak to us on 01277 525 020 or send details through our quote form.