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

Fire Stopping in Somers Town

Fire-rated and intumescent sealing of service penetrations and linear gaps in Somers Town and across Greater London. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Improvised or mixed-product fire seals
  • Unsealed openings around new pipes and cables
  • Expanding foam used as fire stopping
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Fire stopping near Somers Town

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Fire stopping in Somers Town

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, often unnoticed. We close the openings listed on your schedule, using the specified sealant and detail. We work on pipe penetrations, linear gaps at wall heads and joints between fire-resisting walls and floors, and what we’re called in for most is damaged fire seals in risers and voids and hidden openings found during inspections. One point of contact handles commercial sealant work in Somers Town from the first photos to the final walk-round, whether it’s one building or several.

London has many occupied offices, blocks and mixed-use buildings where services are added and rerouted all the time. Where the specification names fire-rated sealant, it goes in exactly as the manufacturer’s test evidence shows for that wall or floor.

A 12-month guarantee applies to all our work in Greater London. Should something we installed fail, call the office on 01277 525 020 or email us and we will come back to it.

Where
Somers Town (NW1W, NW1, W1T)
Wider area
Greater London
Guarantee
A 12-month guarantee
Quotes
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Cost factors for service penetrations

Quotes vary with the job. It mainly depends on:

  • Travel to remote or island sites
  • The total length or number of joints
  • The product specified
  • How accessible the joints are

Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.

What to include in your enquiry

For an accurate fixed quote, we need a clear picture of the site. Useful things to include:

  • Anything awkward about access or site hours
  • Drawings or a marked-up plan, if available
  • Any dates the work must fit around
  • The site address and postcode

We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, phone 01277 525 020 or email drawings and photos.

Your questions answered

How does the move away from BS 476 affect penetration seals in Somers Town?

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

Can you seal around new services in a hotel near Somers Town?

Yes, where the specification calls for fire-rated sealant. Each seal follows the tested detail, and rooms are done in turn.

What if there’s asbestos in the old mastic?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. We don’t remove asbestos-containing materials.

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.

Do you hold CHAS accreditation?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

Can the building stay open while you work?

Typically, yes. We phase the work so most of the building stays in use.

How long does a job like this take?

The duration is planned around your programme and the access we’re given. We will give you an estimate of time on site when we quote.

Doing it in-house

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.

Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

Looking after the joints

Your facilities or cleaning team can help the joints last. Share these points with them:

  • Agree the fire-stopping specification before services go in
  • Foam or ordinary sealant is never a fire-seal repair
  • File the specified details where the next contractor can find them
  • Arrange inspection before areas are covered up

During planned inspections, look at seals in risers, cupboards and voids. Watch for cracked sealant, new services with no seal and openings that have grown, and report them promptly.

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.

On site: what to expect

We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. In Somers Town, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.

  1. We read the specification, drawings or penetration schedule you send and ask about anything unclear.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  3. Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
  4. Mineral wool or other backing goes in wherever the detail asks.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Before we start on site

  • Warn occupants and staff about the work
  • Let us know about inductions and permits
  • Confirm the product named in the specification

Ask for a quote

Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.

Get a price

Related advice

For managing agents and facilities managers

CHAS accredited and a Constructionline member, we’re straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.

What sealant work can’t fix

We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:

  • Plastic pipes whose detail calls for a collar or wrap
  • Construction that lacks the fire resistance the seal relies on
  • Deciding what a wall or floor needs, which belongs to the designer

Not sure which it is? You can call the office on 01277 525 020 or email us and we will tell you honestly.

Joints and surfaces we work on

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

Fire stopping in Somers Town: the local picture

Every new tenant in a London building tends to bring new cabling, and with it new holes through compartment walls. Where fire-rated sealant is specified, we install it to the tested detail under the building’s permit-to-work arrangements. There are two care or nursing homes within about 2 miles of Somers Town. In a care home, any new pipe or cable through a fire-resisting wall should be sealed to the specified detail.

Workshops and IT rooms at colleges like WM College, less than half a mile north-west of Somers Town, are re-serviced often, leaving penetrations to seal. On estates like Roman Way Industrial Estate, 1.1 miles to the north-east of Somers Town, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal. In a retail centre such as Brunswick Centre, 0.6 miles south-east of Somers Town, any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail.

Somers Town is about 1 mile north-west of St Pancras, in Greater London. We send applicators to Somers Town for service penetrations. Our Greater London coverage takes in 764 places.

If you need fire stopping in NW1W, NW1 and W1T, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. For a building on Euston Road, Duke's Road and Phoenix Road or nearby, send details and we will quote for service penetrations. You’ll find Somers Town on or near the A400 and A501, so getting applicators and materials to site is simple. Sites close to Somers Town are covered too, including Euston (1 mile south), Kings Cross (1 mile east), Agar Town (1 mile north), Bloomsbury (1 mile south-east) and Fitzrovia (1 mile south-west). Nearby towns on our patch include London (3 miles south-east), Kensington (4 miles south-west), Walthamstow (6 miles north-east), Whitechapel (3 miles east), Hampstead (3 miles north-west) and Ruislip (12 miles west).

Local landmarks in Somers Town

In Somers Town, that means premises near Regent High School, Wellcome Collection and Lewis Cubitt Park and the streets around them. You will also find UCL School of Slavonic and East European Studies (under half a mile south) and Prince Arthur pub (under half a mile south-west). There’s a railway station in Somers Town itself: London Euston station. Nearby you will also find Brunswick Centre (0.6 miles south-east) and Montfichet's Tower (1.8 miles south-east). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.

Map of Somers Town © OpenStreetMap contributors
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