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

Castle Town fire stopping

Sealant work in Castle Town for main contractors, managing agents and facilities managers: fire-rated and intumescent sealing of service penetrations and linear gaps, with a fixed quote first.

  • Penetration schedules that need working through
  • Fire stopping installed outside its tested range
  • Unsealed openings around new pipes and cables
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
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping in Castle Town

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

Different surfaces, different methods

Metal pipes

Metal pipes conduct heat, so their details often call for extra measures along the pipe. We follow whatever the detail requires and flag anything we can’t match.

Small ducts

Small ductwork can sometimes be sealed with sealant where the tested detail includes it. Bigger ducts and fire-resisting ductwork are normally handled with other products and we flag that rather than guess.

Fire stopping for commercial buildings in Castle Town

It helps to set out our role at the start. Deciding the specification sits with the designer, the fire engineer and building control; sign-off sits with them too. We fit the specified fire-rated sealant following that specification and the maker’s installation guidance. Most enquiries involve builders’ foam or ordinary silicone in compartment walls and fire-stopping items raised at inspection or handover, across linear gaps at wall heads, service gaps in risers and cable penetrations. For commercial sealant work in Castle Town, you deal with one contact from quote to sign-off, whether it’s one building or several.

Smaller places such as Castle Town still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.

Our workmanship is guaranteed for 12 months, wherever the site is. If our installation lets you down in that time, we return and fix it.

Place
Castle Town (BN44)
Wider area
West Sussex
Cover
12 months on every job
Price
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Signs you need fire stopping in Castle Town

Linear gaps fail where a fire-resisting wall meets a slab, soffit or another wall. Deflection and building movement can open these gaps, and a product not tested for that movement may crack. The tested detail for a linear joint states the width and movement it covers.

Common reasons buildings call us in:

  • Unsealed joints where partitions meet the slab
  • Unsealed penetrations discovered above suspended ceilings
  • Openings left by services added after handover
  • Snag lists that include open service penetrations

In a school such as Upper Beeding Primary School, fire-rated sealant goes in around service penetrations where it is specified.

Questions to ask before you book

  • Which product they’ll use, and why it suits the joint
  • Who will actually carry out the work
  • Are they CHAS accredited or on Constructionline?
  • How they’ll work around occupants

How to choose a sealant contractor

Diagnose, treat, sign off

When we get to site, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, with the work itself normally taking a single visit for a short list of penetrations, or a phased programme for a whole building. Jobs in and around smaller places like Castle Town are normally planned as a single visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.

  1. First we go through the drawings, schedule or specification for the seals.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  3. Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
  4. We fit the backing the detail asks for, to the stated depth.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

Before we start on site

  • Tell us which areas need to stay in use
  • Share your working hours and any access restrictions
  • Send any specification or drawings in advance

Getting a fixed quote

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.

Get a quick quote

Related advice

Why deal with it now?

Open penetrations multiply: every new cable or pipe adds another. Keeping on top of it after each round of works keeps the job small. Halls, stores and units around places like Castle Town may not be checked every day, which gives a failed joint time to do damage. Resealing early avoids that.

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 us?

  • Commercial sealant work since 2005
  • One number for every site we cover
  • Work carried out by CSCS-carded applicators
  • Constructionline member for supplier checks

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

Looking after the joints

A few simple habits keep the new joints working:

  • Agree the fire-stopping specification before services go in
  • Report damaged or disturbed seals as soon as they’re spotted
  • Keep product data and details in the fire safety file
  • Make fire stopping part of every scope that crosses a fire-resisting wall

During planned inspections, look at seals in risers, cupboards and voids. Watch for cracked sealant, new services with no seal and openings that have grown, and report them promptly.

Make reporting new openings part of every permit to work in service areas. Small habits like this stop openings building up.

Should maintenance staff do it?

For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.

Penetration seals near Castle Town

In England, Approved Document B covers fire stopping of openings and penetrations. 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. We install whatever has been specified, to the product’s tested detail. The area within 2 miles of Castle Town holds several hotels. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close.

Industrial units on estates such as Mackley Industrial Estate (1.7 miles north-east of Castle Town) often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal. Theatres, wards and plant rooms at sites like Southlands Hospital, 3.1 miles south-east of Castle Town, all have compartment walls crossed by services.

Castle Town is about 3 miles north of Shoreham-by-Sea, in West Sussex. Commercial clients in Castle Town use us for work on service penetrations, as part of our coverage of West Sussex. Castle Town is one of 373 places we cover in West Sussex. For work in that direction, see our Brighton page (8 miles or so).

Business premises anywhere in BN44 are within our area. Among the streets we cover are Henfield Road, The Bostal and Shoreham Road, and sites on any of them can send details for a fixed quote. If your building is just outside Castle Town, we cover Adur (2 miles south), Old Shoreham (3 miles south), Shoreham-by-Sea (3 miles south), Fulking (3 miles east) and Kingston by Sea (4 miles south-east). Bigger towns within reach include Horsham (13 miles north), Worthing (6 miles south-west), Haywards Heath (12 miles north-east), Burgess Hill (9 miles north-east), Littlehampton (11 miles south-west) and Lancing (4 miles south).

Near you in Castle Town

Recent enquiries here include premises near Steyning Grammar School and Hillside Park (parke sa Hiniusang Gingharian) and the streets around them. The nearest railway station is Shoreham-By-Sea station, roughly 3.2 miles south. Other landmarks nearby include Southlands Hospital (3.1 miles south-east) and Steyning Museum (1.5 miles north-west). Green spaces nearby include Mill Hill and Truleigh Hill.

Map of Castle Town © OpenStreetMap contributors

Common questions from Castle Town clients

What happens to BS 476 references for fire stopping in Castle Town?

References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.

Can you seal penetrations in a hotel in Castle Town after a refit?

Yes. We install fire-rated and intumescent sealant where it is specified. Work is done room by room so the hotel keeps trading; design and sign-off stay with the designer and building control.

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

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

What if there’s asbestos in the old mastic?

The duty to manage asbestos sits with the building’s dutyholder, so for older buildings we ask for the asbestos register first. Work pauses if suspect material is found, until it has been tested.

Who decides which product is used?

The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Can one quote cover more than one building?

Yes. A group of buildings can go on one quote, and you deal with one contact throughout.

Are you fully insured?

Yes. Our insurance certificate can be sent alongside the quote.

Accreditations

Trusted. Accredited. Insured.