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

Northfleet expansion joint sealing

Expansion joint sealing for Northfleet, from a contractor working since 2005. Fully insured, with a 12-month guarantee.

  • Water dripping through deck or ramp joints
  • Torn sealant in brick or block movement joints
  • Chipped joint edges on forklift routes
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
Constructionline member
£5m PL insurance

Expansion joint sealing near Northfleet

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

Where floor joints take the most wear near Northfleet

Northfleet lies within about 3 miles of the sea. Coastal yards and decks give their joints salt and wet weather to deal with, not just wheels, and edges left open tend to break up faster. Northfleet lies roughly 20 miles out from central London. The South East has large numbers of industrial estates and warehouses along the motorway corridors.

For buildings at a park such as Imperial Business Park (0.9 miles north-east of Northfleet), brick and panel movement joints are easy to forget until one leaks. Another example is Imperial Retail Park, 1 mile north-east of Northfleet, where floors and yards would be done in stages around the occupiers. Hospitals like Gravesham Community Hospital (1.1 miles north-east of Northfleet) have multi-storey or surface car parks whose joints carry vehicles round the clock.

Northfleet is about 5 miles east of Dartford, in Kent. Commercial clients in Northfleet use us for work on movement joints, as part of our coverage of Kent. 931 places across Kent fall within our area, Northfleet among them. Our London page has more on work in that area.

If you need expansion joint sealing in DA11, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are Lawrance Square, London Road and Marks Square. You’ll find Northfleet on or near the A2 and A226. Nearby places we also cover include Painters Ash (1 mile south-west), Springhead (1 mile west), Windmill Hill (1 mile east), Northfleet Green (1 mile south) and Gravesend (1 mile east) for movement joints. Further afield, our area takes in Maidstone (14 miles south-east), Dartford (5 miles west), Sevenoaks (13 miles south-west), Swanley (8 miles west), Kings Hill (11 miles south) and Foley Park (13 miles south-east).

Near you in Northfleet

We work on buildings around The Six Bells pub, Saint George's Church of England School and Copperfield Academy. The closest station to Northfleet is Gravesend station, about 1 mile north-east of the centre. Nearby you will also find Bluewater (3.3 miles west) and Stone Castle (3.1 miles west). For a walk, there’s Chafford Gorges Nature Park and Sawyers Lake.

Map of Northfleet © OpenStreetMap contributors

Expansion joint sealing in Northfleet, done properly

We have been sealing expansion and movement joints for over 20 years. Our applicators are CSCS-carded, we’re CHAS accredited and a Constructionline member, and we carry five million pounds of public liability insurance. Each job is backed by a 12-month guarantee on the workmanship. Most enquiries involve arrises breaking up along floor joints and damp inside where a wall movement joint has failed, across brickwork movement joints, car park decks and ramps and precast concrete panel joints. A single leaking joint is often how a building in Northfleet first comes to us: we look at the rest while we are there and tell you what we find.

Towns such as Northfleet normally have an industrial estate or a few business units, with warehouse floors and loading areas. Small units are often busy, so joints are done at times that suit the occupier.

The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Northfleet (DA11)
Wider area
Kent
Cover
A 12-month guarantee
Quotes
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026

How a job runs

Working in a building that stays open takes some planning. The work area is signed and kept contained, keep walkways clear and work section by section so the rest of the building stays in use. For a town like Northfleet, we try to group jobs for the same client into one visit. Give us your access times and we will fit the work in.

  1. First the joints are inspected, widths measured and the type of failure noted.
  2. You receive a fixed quote stating the product and the movement it is rated for.
  3. Where areas have to stay open, we agree a phased sequence before starting.
  4. The failed seal is cut out and both joint faces cleaned back to sound material.
  5. Depth is controlled with backing, the faces are primed where the maker calls for it, then the bead is laid and tooled.
  6. We check each joint with you, confirm the cure time and sign off under our 12-month guarantee.

Getting the site ready

  • Explain the parking and delivery arrangements
  • Have the specification and drawings to hand
  • Share the asbestos register for older buildings

Quotes

Need a figure for a tender or a budget? We will quote against your scope and drawings that you can work with. For a chat about it beforehand, speak to us on 01277 525 020 or email drawings and photos.

Get a price

Related advice

What the job involves on each surface

Cladding panel joints

Cladding panels move more than masonry as they heat and cool. A sealant with the right movement class is chosen.

Car park decks and ramps

Failed deck joints often show as leaks on the level below. We strip the old seal, prepare the edges and seal again flagging broken edges along the way.

Site staff or a sealant specialist?

General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

How the quote is worked out

What shapes the price:

  • Working within restricted access windows
  • Travel to remote or island sites
  • The size and state of each joint
  • Quantities, in metres or numbers

A quote for movement joints depends on how many there are, their condition and the access, plus any specification you are working to. Call for a quote.

Before you send an enquiry

A few photographs plus some basic facts will normally do. It helps to include:

  • The postcode of the building
  • The type of building and who uses it
  • Rough lengths or quantities, or drawings if you have them
  • Whether an asbestos survey exists

Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

When it isn’t the sealant

We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:

  • Mechanical expansion joint covers, cover plates or proprietary joint systems (a specialist supplier’s job)
  • Joints too narrow for the movement, which need redesigning by the engineer
  • Broken or spalled joint edges, which need repairing before any sealant goes in

If you are not sure, just ring 01277 525 020 or email us and we’ll give you a straight answer before you book.

Joints and surfaces we work on

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

Why act early in Northfleet

Closing a car park for a reseal is rarely an option. Phased work by bay or zone lets the rest stay in use. We agree phasing with you before work starts. A failed joint is easier to put right before damp shows inside. After a leak, there’s drying, repairs and redecoration on top.

There’s no price list, since every building and every scope is different. Call for a quote.

Why clients in Northfleet choose us

  • One phone line for London, the South East and Scotland
  • Constructionline member for supplier checks
  • Colour agreed before work starts
  • RAL and finish matching where the product range allows

Take a look at what affects the cost and how we’re accredited.

Common questions from Northfleet clients

Is Imperial Business Park, near Northfleet, within your area?

Yes. Our area takes in Northfleet and its surroundings, with estates and business parks such as Imperial Business Park included. Photos and a short description are enough for a first look.

Does a coastal location like Northfleet affect which sealant is used?

It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.

Do you reseal car park expansion joints?

Yes. These joints take wheels, salt and water, so product choice matters, and we will tell you if any edges need repairing first.

Are you insured?

Yes. We’re fully insured, and the certificate can go with your quote.

What exactly is a movement joint?

The terms overlap a great deal. A movement joint allows for expansion, contraction, shrinkage and loading, and the seal across it keeps water and debris out.

What guarantee do you give on joint sealing?

The 12-month guarantee applies to the workmanship. Tell us straight away if a joint we sealed gives trouble in that time.

How do I request a quote?

There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.

Accreditations

Trusted. Accredited. Insured.