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

Fire Stopping in Chinatown

Our CSCS-carded applicators take on fire-rated and intumescent sealing of service penetrations and linear gaps in Chinatown and the surrounding area. Send details for a fixed quote.

  • Unsealed penetrations discovered above suspended ceilings
  • Builders’ foam or ordinary silicone in compartment walls
  • Seals that don’t match their tested detail
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Fire stopping near Chinatown

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

From enquiry to sign-off

We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. All of Greater London is in the ULEZ, and kerbside space in Chinatown can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.

  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. Mineral wool or other backing is fitted where required.
  5. We gun the sealant in to the specified depth around each service and tool it.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

Getting the site ready

  • Send your site hours and access windows
  • Point out parking and an unloading spot
  • Warn occupants and staff about the work

Get a fixed quote

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Get a price

Related advice

About our fire stopping in Chinatown

Opened ceilings and riser doors often reveal service openings nobody sealed. If a specification already covers those walls and floors, we can reseal to it using the product and detail it sets out. With no specification in place, the first step sits with your designer or fire engineer, not with us. If you are dealing with non-fire-rated filler around services and fire-stopping items raised at inspection or handover, we can help. Looking for mastic applicators who cover Chinatown? We have been sealing commercial buildings since 2005.

Taller residential buildings in London may fall under the Building Safety Act’s higher-risk regime, where fire-stopping records get close attention. Our part is installing the specified fire-rated sealant; tell us what records you need and we will confirm with the quote.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Chinatown (W1F, W1D, W1T)
Wider area
Greater London
Guarantee
12 months on every job
Quotes
Quoted before any work starts
Phone
01277 525 020
Updated
3 November 2026

What we’re called out for in Chinatown

Some seals fail because the wrong product went in: expanding foam or a general-purpose sealant pushed into a gap to tidy it. The opening looks sealed but has no fire test evidence behind it, so it has to come out.

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

  • Open linear gaps along the top of fire-resisting walls
  • Fire stopping installed outside its tested range
  • Old intumescent sealant that has split away
  • Unsealed openings around new pipes and cables

Where a unit on an estate such as Grand Vitesse Industrial Estate, 1.4 miles to the east of Chinatown, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail.

What to look for in a quote

  • Health and safety accreditation such as CHAS
  • How long is the guarantee, and what does it include?
  • Whether primer will be used where the manufacturer specifies it
  • Proof of insurance

Questions to ask before you appoint anyone

Compartment walls and floors in Chinatown

London’s office and residential buildings are refitted constantly, and each round of cabling or pipework can leave open penetrations. Penetrations are sealed with the specified product, to its tested detail, under the building’s own permit rules. Chinatown has plenty of hotels close by, all within 2 miles. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close.

Residences at universities like University of Notre Dame, less than half a mile to the south of Chinatown, have compartment walls that must be resealed whenever services change. In a retail centre such as Brunswick Centre, which lies north of Chinatown, any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail.

Chinatown is about 1 mile east of City of Westminster, in Greater London. Our applicators travel to Chinatown for work on service penetrations, handled exactly as we handle every other area. We work across 764 places in Greater London, from busy centres to rural villages.

We cover the W1F, W1D and W1T postcode districts for service penetrations. For a building on Duck Lane, Drury Lane and Bruton Lane or nearby, we can quote for service penetrations. With the A4 and A301 nearby, Chinatown is easy to get to with materials and equipment. We also cover Soho (1 mile north), St James's (1 mile south), West End (1 mile north-east), Seven Dials (1 mile north-east) and St Giles (1 mile north-east) for service penetrations. Bigger towns within reach include Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles east) and Hampstead (4 miles north-west).

Around Chinatown

Locally, jobs take us to sites close to LITE Regal International School, London Library and Waxy O'Connor's pub, among other places. Nearby too are St Anne's Churchyard (less than half a mile north-west) and Harris Westminster Sixth Form (0.8 miles south). Chinatown has its own railway station: Tottenham Court Road station. Well-known places in the area include Leverian collection (under half a mile south-east) and Montfichet's Tower (1.3 miles east). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.

Map of Chinatown © OpenStreetMap contributors

Maintenance after handover

Once the work is signed off, these steps help:

  • Flag new cables with no seal around them
  • Foam or ordinary sealant is never a fire-seal repair
  • Ask which product is in place before decorating
  • Brief every trade that openings they make must be sealed

Never top up a fire seal with foam, ordinary silicone or filler. A repair should use the original product, installed the same way.

Looking at service areas on a regular cycle pays off. Catching a damaged seal early keeps the fix small compared with dozens found at once.

Site staff or a sealant specialist?

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Different surfaces, different methods

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables, so we check before sealing.

Masonry and concrete

Many seals are made in blockwork, brickwork or concrete slabs. Dust and loose debris are cleared out of the opening.

Quoting for work in Chinatown

These are the things that shape the price:

  • Phasing around occupants
  • Access and working height
  • Joint width, depth and condition
  • Whether old sealant has to be cut out first

Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

Sending details for a quote

It doesn’t need to be a full survey. These details are enough to start:

  • Access details, including height
  • The asbestos register, for older buildings
  • The product your specification calls for
  • The postcode of the building

A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or give us a call on 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.

Chinatown: questions and answers

Will you plan work around the academic year at somewhere like University of Notre Dame?

Yes, holiday working periods are the norm on campus jobs. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

Do you cover business parks and estates near Chinatown, such as Grand Vitesse Industrial Estate?

Yes. Our area takes in Chinatown and its surroundings, with estates and business parks such as Grand Vitesse Industrial Estate included. To start, just call the office on 01277 525 020 or email the details over with the unit, the joints involved and your access times.

How long does a job like this take?

It depends on the scope, though a typical visit usually takes a single visit for a short list of penetrations, or a phased programme for a whole building. Larger or phased jobs take longer, and we will give you a timescale with the quote.

Do you take on multi-site work?

Yes. Multi-site work and planned programmes are a core part of the service, planned site by site to suit how each building is used.

Who decides which product is used?

Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Is the work guaranteed?

Yes, for 12 months. If a joint fails because of how we installed it, we come back and put it right.

Will you sign off the seals for us?

No. Approval sits with the designer, principal designer or building control. We will confirm the products and details used, and you can tell us what other records you need at quote stage.

Accreditations

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