Fire stopping in St Pancras
Planning work on a service penetration in St Pancras? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Snag lists that include open service penetrations
- Unsealed joints where partitions meet the slab
- Builders’ foam or ordinary silicone in compartment walls
Fire stopping near St Pancras
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
How we handle fire stopping in St Pancras
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 rather than guesswork. Site teams most often ask us about expanding foam used as fire stopping and unsealed penetrations discovered above suspended ceilings, on pipe penetrations, small duct penetrations where the tested detail allows and joints between fire-resisting walls and floors. A single leaking joint is often how a building in St Pancras first comes to us: we look at the rest while we’re there and tell you what we find.
Taller residential buildings in London may fall under the Building Safety Act’s higher-risk regime, where fire-stopping records get close attention. We install what the designer or fire engineer has specified, and if you need records of the work, tell us and we’ll confirm with the quote.
Whoever the client is, the cover is the same: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Where
- St Pancras (NW1W, W1T, N1)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
What we can’t put right
Honesty saves time and money. New sealant won’t cure:
- Construction that lacks the fire resistance the seal relies on
- Fire doors, dampers or other fire safety equipment
- Writing the fire-stopping specification
Not sure which it is? You can phone 01277 525 020 or email drawings and photos and we will tell you honestly before you book.
Joints and surfaces we work on
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Pipe penetrations
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
FAQs: St Pancras
Can you work around term dates at a campus such as University of the Arts London?
Yes. We plan campus work around teaching, exams and residence turnarounds. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.
Do you cover business parks and estates near St Pancras, such as Roman Way Industrial Estate?
Yes, sites like Roman Way Industrial Estate are within our area, along with the rest of St Pancras. A few photographs and the unit address let us price the work.
Do you take on small jobs?
We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.
Do you approve fire stopping for building control?
No. Sign-off isn’t ours to give, and we don’t hold a third-party installer certificate. Our part is fitting the specified product to its tested detail.
Will you write the fire-stopping specification?
No, that isn’t our role. Once you have a specification, we can price and install the sealant elements of it, and tell you if a detail needs another product.
How do we ask for a quote?
You can use the quote form on this site; alternatively, call the office on 01277 525 020 or send details through our quote form. Include photographs or drawings if you have them.
Which standards are fire seals tested to?
Penetration seals are tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. Results are classified under BS EN 13501-2. That rating only holds when the product is installed to its tested detail.
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. In St Pancras, each extra visit means more notices, permits and disruption, so a proper job first time, with the old sealant fully removed, is worth it.
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.
Why choose Mastic Doctor in St Pancras
- CHAS accredited contractor
- A fixed quote before work starts
- Work to your specification and the manufacturer’s guidance
- 12-month guarantee on workmanship
Take a look at our cost guide and our accreditations and insurance.
Keeping the joints sound
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:
- File the specified details where the next contractor can find them
- Ask which product is in place before decorating
- Flag new cables with no seal around them
- Ask the designer to confirm details early on refits
Store the specified product details somewhere the next contractor can find them. It makes later repairs much easier to match.
On fit-outs, get the fire-stopping specification agreed before the services go in. Details can then be picked to suit the actual pipes, cables and ducts, and installation follows the programme.
Service penetrations in St Pancras buildings
The area within 2 miles of St Pancras holds plenty of hotels. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. 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. What we install is set by the specification, and it goes in to the tested detail.
At a university such as University of the Arts London, which lies south of St Pancras, labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work. For a site team at a college like Westminster Kingsway College, which lies north-west of St Pancras, fire-rated sealing is best scheduled after the summer works. On a hospital site such as Great Ormond Street Hospital for Children, under half a mile to the south-west of St Pancras, fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits.
St Pancras is about 2 miles north-west of London, in Greater London. St Pancras sits inside our coverage and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 764 places in Greater London, large and small.
Commercial sites across NW1W, W1T and N1 are covered. Buildings on Shoe Lane, Long Lane and City Road are within our area for service penetrations. Main routes into St Pancras include the A4 and A40, which helps when planning parking and deliveries for the job. Sites close to St Pancras are covered too, including Bloomsbury (1 mile south-west), Kings Cross (1 mile north-west), Holborn (1 mile south-east), Clerkenwell (1 mile east) and Angel (1 mile north-east). Bigger towns within reach include Kensington (4 miles south-west), Walthamstow (6 miles north-east), Hampstead (3 miles north-west), Ruislip (13 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south). As one of the bigger centres in Greater London, St Pancras has a broad mix of commercial, public and industrial buildings, and we cover them all.
Near you in St Pancras
Around St Pancras, our work takes us to commercial buildings near Lincoln's Inn Fields, City Academy and Elizabeth Garrett Anderson School, among other places. Also close by are Pilsudski Institute of London (less than half a mile south-west) and Calthorpe Arms Public House (less than half a mile south-east). For rail, the closest station is London Kings Cross station, about 0.5 miles north-west of the centre. Nearby you’ll also find Montfichet's Tower (1.1 miles south-east) and Royal National Throat (less than half a mile north). Green spaces nearby include Barnsbury Wood and Ludgate Hill.
Places near St Pancras
Other services in St Pancras
For managing agents and facilities managers
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Hospitality, education, healthcare, office and retail clients come to us directly as well. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.
What the job involves on each surface
Drylining partitions
Plasterboard partitions are tested as a specific construction. We check that the product’s detail covers that partition type and board thickness before sealing.
Cables and cable bundles
New data and power cables are the most common breach we see. We reseal around them to the specified detail, and we tell you if the bundle exceeds what sealant covers.
Diagnose, treat, sign off
We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. Planning a London job such as one in St Pancras starts with access. Give us the hours we can be on site and we’ll schedule to suit.
- First we confirm the product and tested details named in the specification.
- We sort the openings by the detail each one needs.
- Improvised fillers and failed sealant are removed.
- Mineral wool or other backing is fitted where required.
- We gun the sealant in to the specified depth around each service and tool it.
- Completed areas are checked with you, with the records agreed when we quoted.
Before we start on site
- Confirm the product named in the specification
- Make sure the joints can be reached
- Share the asbestos register for older buildings
Request a quote
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To start the process, speak to us on 01277 525 020 or email a schedule or drawings.