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

Expansion and movement joint sealing in Sundridge, Kent

Planning work on a movement joint in Sundridge? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Weathered movement joint sealant that no longer flexes
  • Sealant peeling off one face of the joint
  • Leaks through car park deck joints onto the level below
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
£5m public liability

Expansion joint sealing across Sundridge

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

About our expansion joint sealing in Sundridge

We’ve been sealing expansion and movement joints for over 20 years, for main contractors, FMs, managing agents and building owners. CHAS accredited, Constructionline member, CSCS-carded applicators and five million pounds of public liability insurance. Workmanship is backed by our 12-month guarantee. We work on podiums and floor movement joints, cladding panel joints and car park decks and ramps, and the usual reasons a site gets in touch are water getting into the wall through a failed joint and weathered movement joint sealant that no longer flexes. Looking for mastic applicators who cover Sundridge? We have been sealing commercial buildings since 2005, with CSCS-carded applicators.

For a site near Sundridge, measurements and photographs up front mean one trip where possible, with the right materials on hand. Note joint widths and the traffic that uses them, and we will take it from there.

We stand by our work with a 12-month guarantee. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
Sundridge (TN14)
Region
Kent
Cover
12 months on every job
Quotes
Fixed quote, scope in writing
Telephone
01277 525 020
Last updated
3 November 2026

Signs you need expansion joint sealing in Sundridge

Sometimes the sealant holds but the substrate breaks away. Weak or crumbling concrete, brick or render edges give the sealant nothing sound to grip so edge repair has to come before resealing.

Typical triggers for a call:

  • Movement joints with split or torn sealant
  • Debris jammed in movement joints
  • Water getting into the wall through a failed joint
  • Leaks through car park deck joints onto the level below

For a school such as Combe Bank School, playground and building joints can be done in the holidays.

What to look for in a quote

  • How they’ll work around occupants
  • The named product and why it was chosen
  • Whether their applicators hold CSCS cards
  • Their approach to joint depth and backing

Our contractor checklist

Joints that move: notes for Sundridge

Sundridge sits in one of the drier corners of the country, the South East. Even so, yard and car park joints are only sealed when they’re dry and clean, and winter de-icing salt on car parks and ramps works into any open joint. The 3 miles around Sundridge take in two named trading estates, business parks or retail parks. That puts plenty of warehouse floors, service yards and car parks close by, all with joints under traffic.

At places like North Downs Business Park, which lies north-east of Sundridge, joints are sealed a section at a time so operations carry on. Large sites such as Sevenoaks Hospital (to the east of Sundridge) have car parks, service roads and long elevations with movement joints in brick and panels.

Sundridge is about 3 miles west of Sevenoaks, in Kent. Looking for expansion joint sealing in Sundridge? We can help. 931 places across Kent fall within our area, including Sundridge. Our London page has more on work in that area, about 18 miles away.

Business premises anywhere in TN14 are within our area for movement joints. We cover commercial and managed buildings on Church Road, Chapmans Road and Main Road. Close to Sundridge, our area also takes in Brasted (1 mile west), Chipstead (1 mile north-east), Bessels Green (1 mile east), Brasted Chart (1 mile south-west) and Chevening (2 miles north). Bigger towns within reach include Dartford (12 miles north), Sevenoaks (3 miles east), Royal Tunbridge Wells (12 miles south-east), Gravesend (15 miles north-east), Tonbridge (9 miles south-east) and Northfleet (14 miles north-east).

Near you in Sundridge

Around Sundridge, our work takes us to commercial buildings near The White Hart pub, Montreal Park and Trinity School. The closest station to Sundridge is Dunton Green station, about 2.4 miles north-east. Nearby you will also find Sevenoaks Museum (3 miles east) and Sevenoaks Hospital (3 miles east). The countryside around Sundridge includes Betsom's Hill and Dryhill Nature Reserve.

Map of Sundridge © OpenStreetMap contributors

Doing it in-house

A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.

Work for main contractors and building owners

Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

Quoting for work in Sundridge

A fixed quote reflects the actual work. It allows for:

  • Any access equipment needed
  • The product specified
  • Working within restricted access windows
  • Travel to remote or island sites

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.

What we need to price the job

To price the job accurately, we need to understand the site. Useful things to include:

  • Approximate linear metres or a joint schedule
  • Asbestos survey details if the building is older
  • Clear photos of the problem areas
  • What the building is and how it’s used

Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. If you have questions first, ring 01277 525 020 or email drawings and photos.

On site: what to expect

Working in a building that stays open takes some planning. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. Jobs in and around smaller places like Sundridge are usually planned as a single visit, so we ask for photos and rough sizes first. That way the right products come on the day.

  1. First, the joints are inspected for width, movement and the type of failure.
  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, flagging any broken edges that need repair before sealing.
  4. Closed-cell backing rod is set to depth, or bond-breaker tape in shallow joints.
  5. After any primer the maker requires, the bead is applied and tooled so it grips two sides only.
  6. We check every joint before sign-off, and the work carries our 12-month guarantee.

Before we start on site

  • Make sure the joints can be reached
  • Share the asbestos register for older buildings
  • Warn occupants and staff about the work

Request a quote

The quickest route to a quote is a few photos and the site postcode. Upload them with the quote form, or phone 01277 525 020 or use the quote form if you’d rather talk the job through.

Get a quick quote

Related advice

What the job involves on each surface

Brickwork and blockwork joints

Long brick and block elevations have movement joints at intervals. We use a sealant rated for the movement, usually low-modulus, with backing rod setting the depth.

Internal floor movement joints

Wheeled traffic chips floor joint edges that aren’t supported. The right filler or sealant for the traffic and movement protects them flagging broken arrises before sealing.

Questions about Sundridge

Is Sundridge too small for you to travel to?

Not at all: smaller places are covered as well as towns. We cover Greater London and the counties of the South East. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.

Is a hospital such as Sevenoaks Hospital somewhere you can work?

Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.

Is it fine to apply new sealant on top of old?

No. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

What happens if it rains on the day?

Sealing onto a damp surface leads to adhesion failure, so external work waits for suitable conditions. We agree a revised date with you.

What guarantee do you give on joint sealing?

Each job is backed by a 12-month guarantee on the workmanship. Damage from later works or traffic loads outside the joint’s design isn’t a workmanship fault.

Why do our movement joints keep failing?

The common causes are poor preparation, three-sided adhesion, the wrong movement class and weathering. We diagnose which one it is before resealing, because the fix differs.

How much does the work cost?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we’ll price it properly.

Accreditations

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