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

Fire Stopping in Stonebridge Park

Fire stopping in Stonebridge Park, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Hidden openings found during inspections
  • Seals that don’t match their tested detail
  • Head-of-wall gaps with no fire seal
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping across Stonebridge Park

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

Commercial clients in Stonebridge Park

We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Stonebridge Park can sit alongside others in a wider programme.

Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

How we handle fire stopping in Stonebridge Park

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 and we’d rather say that up front. What we offer is careful installation of the specified sealant to its tested detail, with a 12-month guarantee on our workmanship. If you have fire stopping installed outside its tested range and fire sealant pulled out of the opening, we can help, on small duct penetrations where the tested detail allows, pipe penetrations and linear gaps at wall heads alike. One point of contact handles commercial sealant work in Stonebridge Park from the first photos to the final walk-round, for single jobs and planned programmes alike.

Fit-outs and M&E works in London buildings often leave service penetrations open behind ceilings and in risers. Fire-rated sealant goes in where it’s the specified item; where a collar, wrap or batt is called for instead, we flag it.

The 12-month guarantee covers our workmanship: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Stonebridge Park (NW10, HA9, HA0)
Region
Greater London
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026

Honest limits

We check first that sealant really is the fix. It won’t put right:

  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Issuing fire ratings or certificates for seals
  • Fire risk assessments, a job for a competent assessor

If you’re not sure, just phone 01277 525 020 or send photos by email and we’ll give you a straight answer before you book.

What we seal

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

Diagnose, treat, sign off

Diagnose, treat, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.

  1. First we go through the drawings, schedule or specification for the seals.
  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. If an opening needs something other than sealant, we tell you instead of improvising.

Preparing the site

  • Make sure the joints can be reached
  • Tell us what induction or permit system the site runs
  • Point out any areas we must not close

Ask for a quote

Send us photographs, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Get a price

Read more

Fire-rated sealing for Stonebridge Park buildings

The area within 2 miles of Stonebridge Park holds plenty of hotels. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail. In London buildings, frequent fit-outs and M&E changes are a common reason fire stopping gets breached. Where fire-rated sealant is specified, we install it to the tested detail under the building’s permit-to-work arrangements.

Where a unit on an estate such as Townsend Industrial Estate, 0.6 miles to the south-east of Stonebridge Park, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail. Hospital estates such as Central Middlesex Hospital (to the south of Stonebridge Park) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.

Stonebridge Park is about 1 mile north-west of Harlesden, in Greater London. We send applicators to Stonebridge Park for service penetrations. Our Greater London coverage takes in 764 places, large and small. There’s a separate page for London, about 8 miles away.

If you need fire stopping in NW10, HA9 and HA0, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Buildings on Wood Road, Barry Road and Exton Road are within our area for service penetrations. Just outside Stonebridge Park, we also work in Tokyngton (1 mile north-west), Stonebridge (1 mile south-east), Mapesbury (1 mile north-west), Brent Park (1 mile north-east) and Church End (1 mile east). Nearby towns on our patch include London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles east), Kensington (4 miles south-east), St Pancras (7 miles east) and Shoreditch (8 miles east).

Landmarks near Stonebridge Park

In Stonebridge Park, that means premises near Alperton Community School, St. Raphael's Edible Garden and The Swaminarayan School and the streets around them. There’s a railway station in Stonebridge Park itself: Stonebridge Park station. A little further out are London Designer Outlet (1 mile north-west) and Brent Museum and Archives (1.9 miles east). Not far away are Hanger Hill Wood and Castlebar Hill.

Map of Stonebridge Park © OpenStreetMap contributors

Stonebridge Park: questions and answers

Can you work at a site such as Townsend Industrial Estate, by Stonebridge Park?

Yes, sites like Townsend Industrial Estate are within our area, along with the rest of Stonebridge Park. A few photos and the unit address let us price the work.

Do you take on work at healthcare sites like Central Middlesex Hospital?

Yes, healthcare and care buildings are part of our work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

Can you quote from photographs?

It depends on the job. Simple work can often be priced from photographs, while larger or less clear jobs get a site visit first.

What’s the quickest route to a quote?

You can use the quote form on this site; alternatively, ring 01277 525 020 or email drawings and photos. Photos, drawings or a joint schedule help us quote quickly.

What changes on 2 September 2029?

For buildings in England, Approved Document B removes BS 476 references from 2 September 2029. Classification to BS EN 13501-2 becomes the expected evidence, though transitional rules apply. Scotland follows its own Technical Handbook, including clause 2.1.14 on service penetrations.

How long does a typical visit take?

We plan the time on site around your programme and access. You will have an expected duration with the quote.

Is sealant suitable for all service openings?

No. Sealant is the right product only where the tested detail says so. Collars, wraps, batts and boards exist for openings sealant doesn’t cover, and we flag those rather than improvise.

Signs you need fire stopping in Stonebridge Park

Plenty of openings were simply never closed, often hidden above suspended ceilings or behind boxing. Inspections, refurbishments and ceiling access typically bring them to light.

Look out for the following:

  • Unsealed joints where partitions meet the slab
  • Builders’ foam or ordinary silicone in compartment walls
  • Seals disturbed by maintenance and left open
  • Penetration schedules that need working through

Colleges such as Regent College (1.1 miles north-west of Stonebridge Park) add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product.

Questions to ask before you book

  • Their pre-qualification and accreditations
  • Which product they’ll use, and why it suits the joint
  • Whether old or failed sealant will be cut out, not overlaid
  • What the guarantee covers, and for how long

Questions to ask before you appoint anyone

Keeping the joints sound

For the best life from the joints:

  • Ask the designer to confirm details early on refits
  • Include service cupboards in routine inspections
  • Put resealing into every M&E and fit-out package
  • Leave fire sealant to cure fully before covering it

Add risers, plant rooms and ceiling voids to routine fire-stopping checks. Watch for cracked sealant, new services with no seal and openings that have grown.

The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. Then the seal goes in while the area is open.

Why act early in Stonebridge Park

Leave a penetration open and smoke and fire can cross into the next compartment far earlier than intended. While the openings can be reached, sealing them is normally straightforward. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. Failed sealant in a building in Stonebridge Park can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.

A quote for service penetrations depends on quantities, condition and access, and any specification that applies. Ask us for a fixed quote.

What you get with us

  • Workmanship guaranteed for 12 months
  • Commercial sealant work since 2005
  • A Constructionline member, so easy to vet
  • Work carried out by CSCS-carded applicators

See what affects the cost or our accreditations.

Accreditations

Trusted. Accredited. Insured.