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

Fire Stopping in Handcross

Fire-rated and intumescent sealing of service penetrations and linear gaps in Handcross and across West Sussex. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Builders’ foam or ordinary silicone in compartment walls
  • Fire sealant pulled out of the opening
  • Open linear gaps along the top of fire-resisting walls
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Fire stopping for businesses in Handcross

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

Fire stopping in Handcross, done properly

A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls, and they are easy to forget. Those on your schedule are closed with the specified product. Site teams most often ask us about fire sealant pulled out of the opening and fire seals cut back for extra cables and never reinstated, across small duct penetrations where the tested detail allows, cable penetrations and pipe penetrations. One point of contact handles commercial sealant work in Handcross from the first photographs to the final walk-round, for single jobs and planned programmes alike.

For a smaller site near Handcross, we plan to do all the penetrations in one go, so send the specification and photos first. Design and sign-off belong to the designer or building control; we install what’s specified.

Work we carry out comes with a 12-month guarantee. Should something we installed fail, give us a call on 01277 525 020 or use the quote form and we will come back to it.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Handcross (RH17)
Region
West Sussex
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026

Fire-rated sealing for Handcross buildings

Handcross lies roughly 31 miles out from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls; the gaps need the specified seal. Two care or nursing homes sit less than 2 miles from Handcross. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal.

Schools such as Handcross Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards. For a building at a site such as Tilgate Forest Business Centre (2.7 miles north of Handcross), a check of penetration seals after each fit-out is good practice.

Handcross is about 4 miles south of Crawley, in West Sussex. Anywhere in RH17, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Our West Sussex coverage takes in 373 places, from busy centres to rural villages. Sites around Brighton have their own page, roughly 16 miles from Handcross.

We take on service penetrations across the RH17 postcode area. For a building on High Street, London Road and Windmill Platt or nearby, send details and we’ll quote for service penetrations. Sites close to Handcross are covered too, including Slaugham (1 mile south), Plummers Plain (2 miles south-west), Colgate (3 miles north-west), Broadfield (3 miles north) and Lower Beeding (3 miles south-west). Nearby towns on our patch include Crawley (4 miles north), Horsham (5 miles west), Haywards Heath (6 miles south-east), Burgess Hill (7 miles south-east), East Grinstead (10 miles north-east) and Shoreham-by-Sea (15 miles south).

What’s near Handcross

Locally, jobs take us to sites close to The Royal Oak Public House and Handcross Park School, among other places. Handcross’s nearest station is Balcombe station, roughly 2.8 miles east. Well-known places in the area include Crawley Hospital (4.3 miles north). The countryside around Handcross includes Tilgate Lake and Blunts Wood and Paiges Meadow.

Map of Handcross © OpenStreetMap contributors

When to bring in a specialist

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.

Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

On site: what to expect

On arrival, 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 longer where risers, ceiling voids or occupied floors have to be worked through in sequence. For a building around Handcross, tell us how to find it and who will meet us. Add it to your enquiry and we will build it into the plan.

  1. We ask for the product and detail your designer has specified.
  2. Openings are measured and grouped by detail.
  3. Old or wrong materials are cut out.
  4. Where the detail needs backing, it goes in at the stated depth.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

Before we start on site

  • Share the asbestos register for older buildings
  • Tell us your opening times and when work is allowed
  • Tell us what induction or permit system the site runs

Quotes

Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, phone 01277 525 020 or send photos by email.

Get a quick quote

Advice

Questions about Handcross

What does the BS 476 change mean for fire-rated sealant in Handcross?

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.

Is Handcross too small for you to travel to?

Not at all. Handcross is within our area. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.

Is your workmanship covered by a guarantee?

Yes. Our workmanship is backed for 12 months.

Does the weather affect the work?

It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.

Are you fully insured?

Yes. We’re fully insured, and the certificate can go with your quote.

How long will the new sealant last?

There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.

Do your applicators hold CSCS cards?

Yes. Should the site need card details in advance, let us know and we will send them with the quote.

What we are called out for in Handcross

Plenty of openings were simply never closed. They come to light during inspections, refits or when another trade lifts a tile.

Site and facilities staff are often the first to spot these:

  • Unsealed joints where partitions meet the slab
  • Openings found when ceilings come down for a refit
  • Builders’ foam or ordinary silicone in compartment walls
  • Old intumescent sealant that has split away

Wherever services are added at a hospital such as Crawley Hospital (to the north of Handcross) the compartment line has to be made good with the specified product.

What to look for in a quote

  • Is the sealant right for the movement and the substrate?
  • Their pre-qualification and accreditations
  • Their public liability cover
  • Who will actually carry out the work

Choosing a commercial sealant contractor

Aftercare for building managers

A few simple habits keep the new joints working:

  • Flag new cables with no seal around them
  • Keep general-purpose fillers away from compartment walls
  • Leave fire sealant to cure fully before covering it
  • Brief every trade that openings they make must be sealed

Once the seals are in, tell other trades they exist and must not be disturbed. Any seal cut back for a new service needs reinstating to its tested detail, by someone who knows the system.

Looking at service areas on a regular cycle pays off. A cracked or disturbed seal found early is a small job compared with dozens found at once.

What sets the cost

Sealant work doesn’t have a standard rate, since sites vary so much. What we look at:

  • How much existing material needs removing
  • Site requirements such as inductions and permits
  • How accessible the joints are
  • The size and state of each joint

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you will have a fixed figure to work with.

Sending details for a quote

Whether it’s one area or a whole building, the same details help:

  • Specification clauses that apply
  • Any dates the work must fit around
  • Whether an asbestos survey exists
  • Access details, including height

Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. The easiest way is to phone 01277 525 020 or send photos by email.

What we can’t put right

Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is any of the following:

  • Fire doors, dampers or other fire safety equipment
  • Approving the work on behalf of building control
  • Deciding what a wall or floor needs, which belongs to the designer

If you are not sure, just call 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer.

Joints and surfaces we work on

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

Trusted. Accredited. Insured.