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

Fire-rated sealing and fire stopping in Westerham, Kent

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

  • Seals that don’t match their tested detail
  • Penetration schedules that need working through
  • Fire-rated sealant that has cracked or shrunk back
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
CHAS accredited
£5m PL insurance

Need fire stopping in Westerham?

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

About our fire stopping in Westerham

It helps to set out our role at the start. Deciding the specification sits with the designer, the fire engineer and building control. What we bring is careful installation of the specified sealant, to the maker’s guidance on buildings around Westerham. If you have head-of-wall gaps with no fire seal and fire stopping installed outside its tested range, we can help, whatever the surface. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Westerham is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Buildings in a smaller place such as Westerham that need fire-rated sealing are typically schools, care homes, surgeries, small offices and flats over shops. Around those penetrations, fire-rated sealant is installed if specified, with depth, backing and gap all as tested.

Work we carry out comes with a 12-month guarantee. If an installation problem shows up, call the office on 01277 525 020 or send photos by email and we will arrange a return visit.

Mastic Doctor team members lined up next to their branded vans outside an office building
Location
Westerham (TN16)
Region
Kent
Cover
A 12-month guarantee
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026

When to call us in Westerham

Fire stopping can get squeezed at the end of a programme, or done by whoever is on site. That is how unsuitable products and improvised details end up in compartment walls.

Clients normally get in touch after noticing one or more of the following:

  • Old intumescent sealant that has split away
  • Unsealed penetrations discovered above suspended ceilings
  • Fire-stopping items raised at inspection or handover
  • Non-fire-rated filler around services

For a hotel such as The George And Dragon Hotel (under half a mile south-west of Westerham), penetration seals are worth checking after any refit or services upgrade.

What your quote should include

  • Whether old or failed sealant will be cut out, not overlaid
  • How joint depth will be controlled
  • What the guarantee covers, and for how long
  • The named product and why it was chosen

Choosing a commercial sealant contractor

Westerham: questions and answers

Can you seal around new services in a hotel near Westerham?

Yes, to the specification and the product’s tested detail. We match the product to the wall or floor and the services, and say if something other than sealant is needed.

How does the move away from BS 476 affect penetration seals in Westerham?

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

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

No, never. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.

Are you CHAS accredited?

Yes. We are CHAS accredited and a Constructionline member.

What do you charge?

It depends on the job: quantities, access, the product and any phasing. Call for a fixed quote and we’ll price it properly.

Can staff carry on working while you are here?

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

Do you offer coloured sealant?

That depends on the product specified. Some ranges offer many colours, others very few, so the available colours are confirmed with the quote.

Fire-rated sealing for Westerham buildings

Fire stopping of openings and penetrations in England falls under Approved Document B. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. Westerham lies roughly 17 miles out from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls.

Halls and meeting rooms at places like Church of St Mary the Virgin sometimes gain new services, and any compartment wall crossed needs the specified seal. Theatres, wards and plant rooms at sites like Tandridge Priory (to the south-west of Westerham) all have compartment walls crossed by services.

Westerham is about 5 miles west of Sevenoaks, in Kent. Looking for fire stopping in Westerham? We can help, as we do across Kent. Across Kent, 931 places are covered, including Westerham. London is covered too, around 17 miles from Westerham.

Postcode districts covered here: TN16. If your site is on Market Square, London Road and High Street or close by, send details and we’ll quote for service penetrations. Being close to the A25 and B2024, Westerham is straightforward for us to reach. Just outside Westerham, we also work in Force Green (1 mile north), Moorhouse Bank (1 mile south-west), Goodley Stock (2 miles south), The Chart (2 miles south-west) and South Street (2 miles north-west). A short drive away, we cover Dartford (14 miles north-east), Sevenoaks (5 miles east), Royal Tunbridge Wells (12 miles south-east), Tonbridge (10 miles south-east), Swanley (10 miles north-east) and Kings Hill (14 miles east).

What’s near Westerham

Around Westerham, our work takes us to commercial buildings near The Olde House At Home Public House. Westerham’s nearest station is Hurst Green station, roughly 3.4 miles south-west. Nearby you will also find Tandridge Priory (2.2 miles south-west). The countryside around Westerham includes Betsom's Hill and Dryhill Nature Reserve.

Map of Westerham © OpenStreetMap contributors

Honest limits

A few problems need another trade or a different fix, and we say so rather than covering them up:

  • Writing the fire-stopping specification
  • Gaps in walls that were never built as compartment walls
  • Plastic pipes whose detail calls for a collar or wrap

If in doubt, speak to us on 01277 525 020 or use the quote form and we’ll say what we think before you book.

What we seal

  • Small duct penetrations where the tested detail allows
  • Joints between fire-resisting walls and floors
  • Pipe penetrations
  • Linear gaps at wall heads
  • Service gaps in risers
  • Cable penetrations

On site: what to expect

We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, primer goes on where the manufacturer specifies it, and the sealant is tooled off neatly. If neighbouring businesses or buildings around Westerham need work too, visits can be combined. Mention the building’s opening times and we will work within them.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  4. Unsuitable material is removed and the opening cleaned first.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. Anything outside the detail is reported to you rather than sealed.

Before we start on site

  • Confirm the product named in the specification
  • Clear stock, furniture or equipment away from the joints
  • For older buildings, check the asbestos register before work

Getting a fixed quote

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To ask for one, phone 01277 525 020 or email us.

Get a quick quote

Read more

How the job changes by surface

Drylining partitions

Holes in board are often cut larger than needed. If the gap exceeds the tested range, sealant alone won’t do, and the detail may call for board patching or another product.

Cables and cable bundles

Data cabling added after handover is a regular cause of open service penetrations. We reseal around them to the specified detail, and we tell you if the bundle exceeds what sealant covers.

What happens if it’s left?

An improvised seal can look finished while offering no tested performance. Correcting it means cutting it out and starting again with the specified product. For buildings in places like Westerham, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.

The specified product makes a difference, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

Why clients in Westerham choose us

  • Sealing commercial buildings since 2005
  • A Constructionline member, so easy to vet
  • One number for every site we cover
  • Our applicators hold CSCS cards

See how commercial sealant jobs are priced and how we’re accredited.

Doing it in-house

For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.

Accreditations

Trusted. Accredited. Insured.