The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Expansion and movement joint sealing in Coombe, Greater London

Commercial sealant work in Coombe for contractors, FMs and building owners: expansion and movement joint sealing in walls, decks and floors, with a fixed quote first.

  • Debris jammed in movement joints
  • Water dripping through deck or ramp joints
  • Water getting into the wall through a failed joint
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
£5m public liability

Expansion joint sealing for businesses in Coombe

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Expansion joint sealing for commercial buildings in Coombe

Joints in car park decks and ramps are among the hardest-working in any building. 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. We reseal deck and ramp joints with a trafficable sealant chosen for the movement. Most enquiries involve water dripping through deck or ramp joints and brittle, chalky sealant on external joints, across podiums and floor movement joints, car park decks and ramps and cladding panel joints. A specialist sealant contractor works differently from a general builder: on jobs in Coombe, preparation and product choice get the time they need.

Most London buildings can’t shut a car park, loading bay or warehouse floor for long. Joints are done in sections, with bays coned off one after another, so the site keeps operating.

Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.

Location
Coombe (KT2, KT3, SW20)
Wider area
Greater London
Guarantee
12 months on every job
Quotes
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Do you need expansion joint sealing in Coombe?

Sometimes the sealant holds but the substrate breaks away. If the edge of the joint is friable, the bond fails with it, so we tell you if the edges need repairing first.

What tends to prompt an enquiry:

  • Car park joints leaking onto vehicles below
  • Joints packed with grit and debris
  • Spalled or broken joint edges in floors and decks
  • Sealant peeling off one face of the joint

Across sites such as Wyvern Industrial Estate, 1.5 miles to the south-east of Coombe, floor and movement joints can be sealed in phases so units keep working.

What your quote should include

  • How they handle RAMS and site documents
  • What the guarantee covers, and for how long
  • Their public liability cover
  • Their pre-qualification and accreditations

Choosing a commercial sealant contractor

Diagnose, treat, sign off

Site rules come first: sign-in, induction and whatever permit system the building uses. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Planning a London job such as one in Coombe starts with access. Give us the hours we can be on site and we’ll schedule to suit.

  1. The first job is to check each joint: how wide it is, how it moves and why the old seal let go.
  2. A fixed quote follows, naming the sealant and its movement class.
  3. The failed seal is removed and both faces are cleaned until sound and dry.
  4. Backing rod goes in at the right depth, or bond-breaker tape where the joint is shallow.
  5. Primer goes on where the manufacturer specifies it, followed by the sealant, which is then tooled off.
  6. We check every joint before sign-off, and the work carries our 12-month guarantee.

Before we start on site

  • Share the asbestos register for older buildings
  • Tell us which areas need to stay in use
  • Move anything stored against the joints

Getting a fixed quote

Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, phone 01277 525 020 or send photos by email.

Get a price

Related advice

Doing it in-house

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

Aftercare for building managers

Regular inspection catches problems early. Specifically:

  • Reopen bays and walkways only after the stated cure time
  • Inspect movement joints alongside other routine building checks
  • Avoid parking heavy plant or pallets on joint lines
  • Report split or peeling joint sealant early

Our workmanship on movement joints carries a 12-month guarantee. Keep the handover details, product and date with your O&M records.

A failed deck joint lets water straight through to the level below. That water often carries de-icing salts with it, which is bad news for the concrete and the people parking below. Resealing early limits the damage.

Your questions answered

Can you work on a hospital site such as New Victoria Hospital?

Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Is Shannon Commercial Centre, near Coombe, within your area?

Yes, sites like Shannon Commercial Centre are within our area, along with the rest of Coombe. A few photos and the unit address let us price the work.

Is any job too small?

We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.

Can weather delay the job?

It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.

What do you charge?

There isn’t a price list, because every site is different. Send photographs or drawings and we’ll price it at a fixed figure.

Can one quote cover more than one building?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

Can you work on car park ramps and decks?

Yes. Tell us how the car park is used and which areas must stay open and we’ll plan around them.

Commercial clients in Coombe

Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so the building keeps working while we do.

Building owners and managing agents use us on everything from one building to a spread of sites around Coombe. One quote can cover more than one site, so there’s one set of paperwork to deal with.

Where floor joints take the most wear near Coombe

Few London car parks or loading bays can be taken out of use for more than a short spell, so we seal in sections and hand areas back as each cures. The 3 miles around Coombe 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 Shannon Commercial Centre, 1.5 miles south-east of Coombe, have car parks, paved areas and long brick and panel elevations, all with movement joints. For estates staff at a university like Kingston University, 0.6 miles to the west of Coombe, building and paving joints are part of the planned maintenance list.

Coombe is about 1 mile north of New Malden, in Greater London. Anywhere in KT2, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Coombe is one of 764 places we cover in Greater London. London is covered too, some 9 miles away.

Work on movement joints is covered throughout KT2, KT3 and SW20, whatever the building. Among the streets we cover are West Road, Crown Road and Traps Lane. If your building is just outside Coombe, we cover Motspur Park (1 mile south-east), Coombe Hill (1 mile north), Kingston Vale (1 mile north-east), Norbiton (1 mile south-west) and New Malden (1 mile south). Bigger towns within reach include London (9 miles north-east), City of Westminster (8 miles north-east), Marylebone (8 miles north-east), Kensington (6 miles north-east), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).

Landmarks near Coombe

Recent enquiries here include premises near Canbury School, Coombe Girls' School and The Royal Oak Public House, among other places. The nearest railway station is Norbiton station, roughly 1 mile south-west. Other landmarks nearby include Bentall Centre (1.8 miles west) and White Lodge Museum (1.8 miles north). Green spaces nearby include Kew Gardens Lake and Kingston Hill Road area.

Map of Coombe © OpenStreetMap contributors

How the job changes by surface

Concrete and precast panel joints

Concrete edges can be weak or carry release agents that stop adhesion. Proper cleaning and primer where specified give a sound bond and check the edges for soundness as we go.

Internal floor movement joints

Floor joints include saw-cut joints and construction joints. A semi-rigid filler is common in trafficked industrial floors, with a flexible sealant where movement is larger.

Accreditations

Trusted. Accredited. Insured.