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

Fire Stopping in Sharpthorne

Commercial sealant work in Sharpthorne for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, quoted at a fixed price.

  • Openings found when ceilings come down for a refit
  • Openings left by services added after handover
  • Fire-rated sealant that has cracked or shrunk back
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping in Sharpthorne

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

Cost factors for service penetrations

Your fixed quote is built from the real scope. It allows for:

  • How much there is to seal
  • Which sealant the job calls for
  • Joint width, depth and condition
  • Location, for remote and island sites

What a job costs comes down to how many linear metres there are, what has to come out first and the access. Call for a fixed quote once you have the details.

Before you send an enquiry

To price the job accurately, we need a clear picture of the site. Send us:

  • The asbestos register, for older buildings
  • Any specification or named product
  • The postcode of the building
  • Your programme or deadline

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 email us to discuss it first.

Fire stopping in Sharpthorne

Every service that crosses a compartment wall or floor leaves an opening, and that opening needs sealing to hold back fire and smoke. Our part is installing fire-rated and intumescent sealant at those openings and along linear gaps, where the specification calls for it. We work to the product’s tested detail for every seal. If you have builders’ foam or ordinary silicone in compartment walls and fire stopping installed outside its tested range, we can put it right, on service gaps in risers, joints between fire-resisting walls and floors and cable penetrations alike. For commercial sealant work in Sharpthorne, you deal with one contact from quote to sign-off, whether it’s one building or several.

Smaller places such as Sharpthorne still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.

Work we carry out in West Sussex 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’ll arrange a return visit.

Place
Sharpthorne (RH19)
Region
West Sussex
Cover
12 months on every job
Quotes
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Building owners, agents and FMs in Sharpthorne

Whether you are a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.

Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first.

On site: what to expect

A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. On site, the work normally takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence, and we clear our waste as we work. If others near Sharpthorne need work, visits can be combined, which keeps travel down. A fixed quote is given before anything starts.

  1. First we confirm the product and tested details named in the specification.
  2. Openings are measured and grouped by detail.
  3. Improvised fillers and failed sealant are removed.
  4. Mineral wool or other backing is fitted where required.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. Completed areas are checked with you, with the records agreed when we quoted.

Getting the site ready

  • Confirm the product named in the specification
  • Arrange parking or a loading space
  • Tell us your opening times and when work is allowed

Ask for a quote

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.

Get a quick quote

Advice

Compartments and services around Sharpthorne

Fire stopping of openings and penetrations in England falls under Approved Document B. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. At about 29 miles from central London, Sharpthorne is within reach of the capital. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls.

In a building such as St Margaret's Church, any service penetration through a fire-resisting wall should be sealed to the specified detail. Holiday works at schools like West Hoathly CofE Primary School often leave service openings to seal before pupils return. Hospital estates such as Queen Victoria Hospital (to the north-east of Sharpthorne) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.

Sharpthorne is about 4 miles south of East Grinstead, in West Sussex. Across the RH19 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Across West Sussex, 373 places are covered, Sharpthorne among them. For work in that direction, see our Brighton page (17 miles or so).

Postcode districts covered here: RH19. We cover commercial and managed buildings on Station Road, Marlpit Road and Bayhams Field and the roads nearby. Nearby places we also cover include West Hoathly (1 mile west), Highbrook (2 miles south), Selsfield Common (2 miles north-west), Little London (2 miles south-west) and Birchgrove (3 miles south-east) for service penetrations. Bigger towns within reach include Crawley (7 miles west), Horsham (12 miles west), Haywards Heath (6 miles south-west), Burgess Hill (9 miles south-west), East Grinstead (4 miles north) and Broadfield (7 miles west).

Local landmarks in Sharpthorne

We work on buildings around The Fox pub. The closest station to Sharpthorne is East Grinstead station, roughly 3.6 miles north. A little further out are Waterbury Castle (2.6 miles south) and East Grinstead Museum (3.7 miles north-east). For a walk, there’s Hedgecourt Lake.

Map of Sharpthorne © OpenStreetMap contributors

How the job changes by surface

Linear joints

Head-of-wall joints often have to absorb slab deflection. We use the product and backing the detail names for that movement, along the full length of the run.

Masonry and concrete

Openings through concrete vary from tidy cores to rough break-outs. Each gap is measured where it is widest against the detail’s limits, and any outside it are raised with you.

Your questions answered

Do you take on work at healthcare sites like Queen Victoria Hospital?

Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Is Sharpthorne 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. Good photos up front let us bring everything on the first visit.

How long before the joints can be used?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, so we will confirm the curing time on the day.

Will you come and look before quoting?

It depends on the job. Straightforward work can often be priced from photos and measurements, while larger or less clear jobs get a site visit first.

Do the same rules apply to fire stopping in Scotland?

Building standards in Scotland are separate from England’s, while England relies on Approved Document B. Either way, we install the specified sealant to its tested detail.

What happens if old sealant might contain asbestos?

The duty to manage asbestos sits with the building’s dutyholder, so for older buildings we ask for the asbestos register first. If anything suspect turns up, we stop until it’s tested.

Are you insured?

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

Honest limits

Being straight saves everyone time. Fresh joints won’t solve:

  • Writing the fire-stopping specification
  • Walls or floors that aren’t fire-resisting to begin with
  • Reviewing a building’s overall fire safety

If in doubt, ring 01277 525 020 or email the details over and we’ll say what we think before you book.

Joints and surfaces we work on

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

What happens if it’s left?

The longer openings stay, the more there tend to be: every new cable or pipe adds another. Keeping on top of it after each round of works keeps the job small and avoids a much larger catch-up later. One visit to deal with every failing joint makes more sense than several trips to a place like Sharpthorne, rather than one at a time. Send photos of each area and we will quote for the lot.

Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.

Why us?

  • Public liability insurance in place
  • One contact handling all your sites
  • Constructionline member
  • Specification-led, product-correct work

Read our cost guide and our accreditations and insurance.

Accreditations

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