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

Old Malden expansion joint sealing

Expansion and movement joint sealing in walls, decks and floors in Old Malden and across Greater London. CHAS accredited and fully insured, with a 12-month guarantee.

  • Sealant pulling off the joint face
  • Rain penetration at brick or block movement joints
  • Spalled or broken joint edges in floors and decks
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
Constructionline member
£5m public liability

Expansion joint sealing near Old Malden

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Expansion joint sealing for commercial buildings in Old Malden

If you need expansion joint sealing in Old Malden, start with photos and joint lengths. We will come and look where photographs don’t show enough, then send a fixed quote that names the sealant. You can also ring 01277 525 020 or use the quote form to talk the joints through. If you have torn sealant in brick or block movement joints and new sealant over old, now failing, we can put it right, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, in Old Malden it comes down to the same thing: the right product in a properly prepared joint.

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.

A 12-month guarantee applies to all our work. Should something we installed fail, speak to us on 01277 525 020 or email the details over and we’ll come back to it.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Old Malden (KT19, KT4, KT5)
Region
Greater London
Cover
12 months on our workmanship
Quote
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026

FAQs: Old Malden

Is hospital work, at somewhere like Tolworth Hospital, something you do?

Yes, provided the work is planned with the site’s estates team. Each area is agreed with the ward or department and the estates team in advance.

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. The building manager’s rules go straight into our method. We allow for the ULEZ, which covers every borough

Can the sealant be colour-matched?

In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We will confirm the colours available for the specified product.

Can one quote cover more than one building?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

Why do our movement joints keep failing?

Typically the joint is moving more than the sealant can take. We review the joint design as well as the sealant before pricing so the same failure isn’t repeated.

What if the joint edges are damaged?

A bond is only as strong as the material behind it, so we will tell you if the edges need repairing before sealing. We flag it at the quote stage where we can see it.

Does the weather affect joint sealing?

Sealant needs a dry joint and a temperature within the product’s range. Cold, damp or frosty mornings can stop work outside so external dates keep some flexibility.

Should maintenance staff do it?

A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

Maintenance after handover

Cleaning and maintenance staff play a part too. Pass these on to them:

  • Put movement joints on the planned maintenance inspection round
  • Clear dirt from joint lines during routine cleaning
  • Act on the first tear or lifting edge rather than waiting
  • Inspect exposed joints once the cold weather has passed

Movement joints belong on the planned maintenance inspection list. A periodic look picks up tears and lifting before water gets in and long before edges start to break. If anything looks wrong, ring 01277 525 020 or email a schedule or drawings with photographs.

Once debris packs a failed joint, the structure has nowhere to expand. The arrises crack and break away under the load. Keeping the seal sound avoids all of that.

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:

  • Cracking or settlement that calls for an engineer’s assessment
  • Mechanical expansion joint covers, cover plates or proprietary joint systems (a specialist supplier’s job)
  • Changing the joint layout or spacing of a structure

Not sure which it is? You can call 01277 525 020 or send details through our quote form and we’ll tell you honestly before you book.

What we seal

  • Car park decks and ramps
  • Cladding panel joints
  • Precast concrete panel joints
  • Blockwork control joints
  • Brickwork movement joints
  • Podiums and floor movement joints

Commercial clients in Old Malden

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.

CHAS accredited and a Constructionline member, we make supplier vetting simple. We are fully insured, and our insurance certificate can go with the quote.

Where floor joints take the most wear near Old Malden

London car parks, loading bays and podium decks often can’t close for long, so the work is broken into short sections agreed with the building manager. The 3 miles around Old Malden take in at least three named trading estates, business parks or retail parks. Sites like these are full of saw-cut floor joints, yard slabs and car park joints.

Phasing is what makes joint work possible on busy sites such as Shannon Commercial Centre (2.1 miles north-east of Old Malden): one bay, aisle or car park row at a time. Campuses like Kingston University (2.4 miles north-west of Old Malden) mix old and new buildings, with movement joints wherever they meet. For a centre such as Bentall Centre (3 miles north-west of Old Malden), the service yard and car park joints usually need attention first.

Old Malden is about 2 miles north-west of Ewell, in Greater London. We send applicators to Old Malden for movement joints, handled exactly as we handle every other area. 764 places across Greater London fall within our area, including Old Malden. Our London page has more on work in that area.

We cover the KT19, KT4 and KT5 postcode districts for movement joints. Among the streets we cover are Curtis Road, Rowden Road and Grafton Road. If your building is just outside Old Malden, we cover Worcester Park (1 mile east), Tolworth (1 mile north-west), Stoneleigh (1 mile south-east), Berrylands (1 mile north-west) and Chessington (2 miles south-west). Further afield, our area takes in London (11 miles north-east), City of Westminster (11 miles north-east), Marylebone (11 miles north-east), Kensington (9 miles north), St Pancras (12 miles north-east) and Shoreditch (13 miles north-east).

Local landmarks in Old Malden

We work on buildings around Hogsmill LNR, Richard Challoner School and The Plough Inn Public House. For rail, the closest station is Tolworth station, about 0.5 miles west. A little further out are Tolworth Hospital (0.9 miles west) and Cockney Museum (1.3 miles south-east). For a walk, there’s Tolworth Court Farm Fields and The Lake.

Map of Old Malden © OpenStreetMap contributors

Diagnose, treat, sign off

Tell us your site hours and access windows and we’ll plan around them. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. Most London premises stay occupied while we’re on site, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.

  1. Photos, joint lengths and drawings come to us, or we visit.
  2. Joint widths and expected movement are checked against what the sealant can take, and flag anything that needs an engineer.
  3. Every joint is cleared of the failed seal and any grit packed into it.
  4. Any broken arrises or friable edges are flagged before work goes further.
  5. A sealant suited to the movement and traffic is laid to depth and tooled.
  6. Each area is handed back after its cure time, under our 12-month guarantee.

Before we start on site

  • Clear stock, furniture or equipment away from the joints
  • Confirm the product named in the specification
  • Flag any permit to work we will need

Request a quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, speak to us on 01277 525 020 or send details through our quote form.

Ask for a quote

Read more

Surface by surface

Brickwork and blockwork joints

Long brick and block elevations have movement joints at intervals. They take a low-modulus sealant with a movement class to suit, with backing rod setting the depth.

Concrete and precast panel joints

Precast and concrete panel joints move daily. The sealant needs the right movement capability and a controlled depth.

Accreditations

Trusted. Accredited. Insured.