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

Fire Stopping in Canonbury

Fire stopping in Canonbury, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.

  • Fire stopping installed outside its tested range
  • Unsealed penetrations discovered above suspended ceilings
  • Fire-stopping items raised at inspection or handover
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Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
Constructionline member
£5m PL insurance

Fire stopping in Canonbury

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Questions about Canonbury

How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Canonbury?

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes 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 cope with the access rules in a London building?

Yes, we plan every London job around the building’s own access rules. Share the building’s contractor rules and we will work to them.

Do you offer coloured sealant?

That depends on the product. Some ranges offer many colours, others very few, so the available colours are confirmed with the quote.

How do you choose the sealant?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Do you take on multi-site work?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

Do you work to architects’ specifications?

Yes. Send it with your enquiry, and the quote will be based on it, flagging anything that needs clarifying.

Are you fully insured?

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

Fire stopping for commercial buildings in Canonbury

We are commercial sealant applicators, CHAS accredited and a Constructionline member, with CSCS-carded applicators on site. We hold no third-party fire-stopping installer certificate. What we offer is careful installation of the specified sealant to its tested detail, with a 12-month guarantee on our workmanship. Site teams most often ask us about builders’ foam or ordinary silicone in compartment walls and damaged fire seals in risers and voids, on cable penetrations, small duct penetrations where the tested detail allows and pipe penetrations. A specialist sealant contractor works differently from a general builder: in Canonbury, that means joint design, primers and backing rod as standard.

In London, higher-risk residential buildings under the Building Safety Act bring extra scrutiny of fire-stopping records. We install what the designer or fire engineer has specified, and if you need records of the work, tell us and we will confirm with the quote.

Every job is signed off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.

Place
Canonbury (N1, N1P, E8)
Wider area
Greater London
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Compartments and services around Canonbury

Canonbury has plenty of hotels close by, all within 2 miles. In hotels, bedroom and corridor walls are typically fire-resisting, so services added in a refit need sealing with the specified product. The 2 miles around Canonbury include 10 care or nursing homes. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal.

Campus buildings at universities such as University of Wales Trinity Saint David London, 0.7 miles to the south of Canonbury, see constant changes to data and services, and fire-rated sealant goes in around new penetrations where it is specified. On a hospital site such as Moorfields Eye Hospital (City Road campus) (1.1 miles south of Canonbury), fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits. For a site team at a college like New City College, 1 mile to the south-east of Canonbury, fire-rated sealing is best scheduled after the summer works.

Canonbury is about 2 miles north-east of St Pancras, in Greater London. Across the N1 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. 764 places across Greater London fall within our area, Canonbury among them.

Postcode districts covered here: N1, N1P and E8 for service penetrations. We cover commercial and managed buildings on Dove Road, Essex Road and Clare Lane and the roads nearby. You’ll find Canonbury on or near the A1199 and A1200. Close to Canonbury, our area also takes in De Beauvoir Town (1 mile east), Mildmay (1 mile north-east), Kingsland (1 mile east), Newington Green (1 mile north) and Highbury (1 mile north-west). A short drive away, we cover London (3 miles south), City of Westminster (3 miles south-west), Marylebone (3 miles south-west), Kensington (6 miles south-west), Walthamstow (4 miles north-east) and Hampstead (4 miles west).

What’s near Canonbury

Locally, jobs take us to sites close to Bishopsgate Institute Special Collections and Archives, City of London Academy Highbury Grove and Islington Green School and the streets around them. Nearby too are New Crown pub (less than half a mile north-west) and Shoreditch Park (0.6 miles south). Canonbury has its own railway station: Canonbury station. Well-known places in the area include Montfichet's Tower (2.2 miles south) and Clowns Gallery-Museum (0.7 miles east). Not far away are St. James's Park Lake and Ludgate Hill.

Map of Canonbury © OpenStreetMap contributors

Doing it in-house

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. Getting these wrong typically costs more in the end than doing them right.

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.

Aftercare for building managers

For the best life from the joints:

  • Check with the data sheet before painting over fire sealant
  • Keep product data and details in the fire safety file
  • Look above ceilings when tiles are lifted for other jobs
  • Brief every trade that openings they make must be sealed

Don’t patch a fire-rated seal with anything outside its tested detail. Repairs need the same product and detail as the original unless the designer specifies otherwise.

Ask every contractor who works in risers or voids to report openings they create. Small habits like this stop openings building up.

Diagnose, treat, sign off

We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. Most London premises stay occupied while we are on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  4. Unsuitable material is removed and the opening cleaned so the seal starts clean.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. Anything outside the detail is reported to you rather than sealed.

Before we start on site

  • Share the asbestos register for older buildings
  • Agree which areas must stay open
  • Clear stock, furniture or equipment away from the joints

Request a quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, call the office on 01277 525 020 or email the details over.

Get a quick quote

Related advice

What we can’t put right

Some faults sit outside our scope, and we point that out rather than sealing over them:

  • Gaps in walls that were never built as compartment walls
  • Issuing fire ratings or certificates for seals
  • Openings that need collars, wraps, batts or boards rather than sealant

If you are not sure, just call the office on 01277 525 020 or email the details over and we’ll give you a straight answer.

Where we work in Canonbury

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

Building owners, agents and FMs in Canonbury

As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.

Cost factors for service penetrations

Before we quote, we look at:

  • The product specified
  • The site’s rules and procedures
  • Any access equipment needed
  • Location, for remote and island sites

Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote, and you’ll have a fixed figure to work with.

Before you send an enquiry

A few photographs plus some basic facts will normally do. It helps to include:

  • The asbestos register, for older buildings
  • Drawings or a marked-up plan, if available
  • The product your specification calls for
  • When you need the work done

For a fixed quote, speak to us on 01277 525 020 or send photos by email with the site address and an outline of the work. Our quote form is another easy route.

Accreditations

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