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

Chevening expansion joint sealing

Expansion and movement joint sealing in walls, decks and floors in Chevening. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Previous reseals laid over old sealant
  • Car park joints leaking onto vehicles below
  • Movement joints with split or torn sealant
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Expansion joint sealing in Chevening

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

Site staff or a sealant specialist?

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, which is what makes a joint last.

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.

Expansion joint sealing in Chevening

We cover the full range of movement joints: vertical joints in brick and block facades, joints between precast or cladding panels, concrete slab and deck joints, ramps, podiums and internal floors. The product depends on the movement, the weather and anything that runs over it, and we’ll confirm the choice in the quote. If you’re dealing with damp inside where a wall movement joint has failed and joints packed with grit and debris, we can put it right, whatever the surface. Searching for sealant specialists in Chevening? We’ve been sealing commercial buildings since 2005, with CSCS-carded applicators.

For a site near Chevening, measurements and photos 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 behind the joints we seal with a 12-month guarantee. That covers our preparation and application.

Place
Chevening (TN14)
Region
Kent
Guarantee
12 months on our workmanship
Quote
A fixed quote before we start
Telephone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

How the job changes by surface

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.

Concrete and precast panel joints

Precast panels often have surface residues that sealant won’t bond to. We prepare the faces thoroughly and prime where the maker calls for it and check the edges for soundness as we go.

How a job runs

At the end of each section, we remove the tape, clean down and inspect every joint with your site contact. If an area should be left alone while the sealant cures, we say how long and put signs out. Smaller jobs around Chevening can be grouped with others nearby, which keeps travel down. A fixed quote is given before anything starts.

  1. We look at the joints, their width and how they’ve failed.
  2. You get a fixed quote with the product and its movement capability stated.
  3. The failed seal is removed and both faces are cleaned until sound and dry.
  4. We control the depth with backing rod or, in shallow joints, bond-breaker tape.
  5. Where the maker calls for primer, it’s applied first, then the bead goes in and is tooled to a concave finish.
  6. We check every joint before sign-off, and the work carries our 12-month guarantee.

Preparing the site

  • Share your working hours and any access restrictions
  • Tell us which areas need to stay in use
  • Have the specification and drawings to hand

Ask for a quote

Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to phone 01277 525 020 or email a schedule or drawings.

Get a price

Advice

How the quote is worked out

Your fixed quote is built from the real scope. It takes account of:

  • Whether the work must be split into stages
  • Distance, for remote addresses
  • Backing rod, priming and other preparation
  • Which sealant the job calls for

Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.

What to include in your enquiry

To price the job accurately, we need to understand the site. Send us:

  • The site address and postcode
  • Photos of the joints, close up and from further back
  • The asbestos register, for older buildings
  • Specification clauses that apply

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. For smaller jobs, photographs and a description will do.

Commercial clients in Chevening

We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Chevening can form part of a wider programme across Kent.

When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.

Chevening: questions and answers

Do you take on work at healthcare sites like Sevenoaks Hospital?

Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.

Is North Downs Business Park, near Chevening, within your area?

Yes. Our area takes in Chevening and its surroundings, with estates and business parks such as North Downs Business Park included. To start, just speak to us on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.

Can staff carry on working while you’re here?

Yes, with some planning. Tell us your site hours and access windows and we’ll plan around them.

How long before the joints can be used?

We will confirm how long the chosen product needs to cure, and sign any area that should be left alone.

How do you deal with asbestos in old sealant?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. We don’t remove asbestos-containing materials.

Does the weather affect joint sealing?

Sealing onto a damp surface leads to adhesion failure. We agree a revised date with you.

Can you send site paperwork?

Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we will confirm with the quote.

Where floor joints take the most wear near Chevening

Rainfall across the South East, Chevening included, is lower than in many parts of the UK. External slab and deck joints still need a dry, clean joint to seal, and where de-icing salt is spread in winter, open joints let it in. Chevening lies roughly 17 miles out from central London. The South East has large numbers of industrial estates and warehouses along the motorway corridors.

For a school such as Combe Bank School, playground and building joints can be done in the holidays. Hospital campuses such as Sevenoaks Hospital (2.9 miles east of Chevening) grow in stages, leaving movement joints wherever new blocks meet old.

Chevening is about 3 miles north-west of Sevenoaks, in Kent. We cover Chevening, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 931 places in Kent, from busy centres to rural villages. There’s a separate page for London, roughly 17 miles from Chevening.

We take on movement joints across the TN14 postcode area, whatever the building. If your building is just outside Chevening, we cover Chipstead (1 mile south-east), Sundridge (2 miles south), Dunton Green (2 miles east), Bessels Green (2 miles south-east) and Riverhead (2 miles south-east). A short drive away, we cover Dartford (11 miles north), Sevenoaks (3 miles south-east), Royal Tunbridge Wells (13 miles south-east), Gravesend (14 miles north-east), Tonbridge (9 miles south-east) and Northfleet (13 miles north-east).

What’s near Chevening

We work on buildings around Trinity School and the streets around them. The closest station to Chevening is Dunton Green station, roughly 1.7 miles east. Well-known places in the area include Sevenoaks Hospital (2.8 miles east) and Kemsing Castle Bank (4.2 miles east). The countryside around Chevening includes Dryhill Nature Reserve and Betsom's Hill.

Map of Chevening © OpenStreetMap contributors

Signs you need expansion joint sealing in Chevening

Weathering wears down sealant on exposed elevations and decks. In time the bead chalks, stiffens and cracks and opens at the next temperature swing.

What tends to prompt an enquiry:

  • Expansion joints filled with dirt and stones
  • Hardened, cracked sealant on exposed facades
  • Water getting into the wall through a failed joint
  • Layers of sealant in a movement joint

At places like Salters Heath Business Centre, 2.2 miles south-east of Chevening, joints are sealed a section at a time so operations carry on.

Comparing quotes

  • Are they CHAS accredited or on Constructionline?
  • Their plan for phasing and protecting the area
  • Is the sealant right for the movement and the substrate?
  • What the guarantee covers, and for how long

How to choose a sealant contractor

Accreditations

Trusted. Accredited. Insured.