Fire Stopping in Northfields
Planning work on a service penetration in Northfields? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Damaged fire seals in risers and voids
- Old intumescent sealant that has split away
- Openings left by services added after handover
Need fire stopping in Northfields?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Fire stopping in Northfields, done properly
Where pipes, cables and other services cross a compartment wall or floor, the opening around them has to be closed so fire and smoke can’t move between compartments. Our part is installing fire-rated and intumescent sealant at those openings and along linear gaps, where the specification calls for it. Each seal follows the manufacturer’s tested detail. If you’re dealing with service penetrations left open after M&E works and fire-stopping items raised at inspection or handover, we can put it right. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Northfields, that means joint design, primers and backing rod as standard.
After a fit-out or new cabling in a London building, risers and ceiling voids are where open service gaps tend to be found. Fire-rated sealant goes in where it’s the specified item; where a collar, wrap or batt is called for instead, we flag it.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Where
- Northfields (W5, W13, TW8)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Page updated
- 3 November 2026
What sets the cost
There’s no standard rate for sealant work, since sites vary so much. What we take into account:
- Backing rod, priming and other preparation
- How much existing material needs removing
- The total length or number of joints
- Access and working height
Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.
Sending details for a quote
A good diagnosis starts with the right details. Tell us:
- How the joints are reached, and at what height
- Rough lengths or quantities, or drawings if you have them
- Any specification or named product
- Your programme or deadline
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to speak to us on 01277 525 020 or email us with what you know.
Do you need fire stopping in Northfields?
Damage plays a part too. Seals get knocked during maintenance, cut back to add a cable or pulled out when services are swapped and the opening isn’t always resealed.
Site and facilities staff are often the first to spot these:
- Old intumescent sealant that has split away
- Non-fire-rated filler around services
- Unsealed openings around new pipes and cables
- Snag lists that include open service penetrations
For an estates team at a campus like University of West London (Brentford Campus), 0.7 miles to the south of Northfields, summer M&E works are normally followed by a round of penetration sealing.
What to look for in a quote
- Will RAMS and insurance details be available?
- Do they follow the manufacturer’s priming guidance?
- Who will actually carry out the work
- Their pre-qualification and accreditations
On site: what to expect
At the end of each section, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. Where the sealant needs time to cure before use, we tell you and sign the area. In Northfields, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- We ask for the product and detail your designer has specified.
- Openings are measured and grouped by detail.
- Improvised fillers and failed sealant are removed.
- Mineral wool or other backing is fitted where required.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- We walk the completed areas with you and confirm the records agreed at quote stage.
What we need from you
- Share the asbestos register for older buildings
- Have the specification and drawings to hand
- Tell staff and tenants when we’ll be in
Ask for a quote
Send us photos, drawings or a joint schedule and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.
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Also near Northfields
What else we do in Northfields
Looking after the joints
After handover, a little attention goes a long way:
- Brief every trade that openings they make must be sealed
- Get seals inspected before ceilings and boxing close
- Report damaged or disturbed seals as soon as they’re spotted
- Ask which product is in place before decorating
New services after handover are a common way fire stopping gets breached. A short check at the end of each job saves a long hunt later.
Regular walk-rounds of service areas are worth the time. Catching a damaged seal early keeps the fix small.
Doing it in-house
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take 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.
Common questions from Northfields clients
Can you work around term dates at a campus such as University of West London (Brentford Campus)?
Yes. Education sites usually want the work in vacations or in phases during term, and we plan to suit. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.
How does the move away from BS 476 affect penetration seals in Northfields?
From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.
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.
Do you have public liability insurance?
Yes. Our insurance certificate can be sent alongside the quote.
Can you handle several sites?
Yes. Several buildings can share a single quote, with one point of contact across South East England, Greater London and Scotland.
Do you hold CHAS accreditation?
Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.
Will you just go over the old sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Where services cross fire walls in Northfields
For England, the fire stopping of penetrations is dealt with in Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. In London buildings, frequent fit-outs and M&E changes are a common reason fire stopping gets breached. Penetrations are sealed with the specified product, to its tested detail, under the building’s own permit rules.
Wherever services are added at a hospital such as Clayponds Hospital (0.7 miles south-east of Northfields) the compartment line has to be made good with the specified product. Shop fits in centres such as Kew Retail Park, 2.1 miles south-east of Northfields, can bring new services through fire-resisting walls between units, which then need the specified seal.
Northfields is about 1 mile south of Ealing, in Greater London. We cover Northfields and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Across Greater London, 764 places are covered, including Northfields. London is covered too, around 9 miles from Northfields.
Anyone looking for fire stopping in W5, W13 and TW8 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Buildings on Burns Road, South Road and Elers Road are within our area. You will find Northfields on or near the A3002. We also cover Brentford (1 mile south-east), Gillette Corner (1 mile south-west), Brentford End (1 mile south), Osterley (2 miles south-west) and Spring Grove (2 miles south-west). Further afield, our area takes in London (9 miles east), City of Westminster (7 miles east), Marylebone (7 miles east), Kensington (5 miles east), St Pancras (9 miles east) and Shoreditch (10 miles east).
Local landmarks in Northfields
We work on buildings around Ealing Fields High School, Great Ealing School and Ealing Park Tavern and the streets around them. You’ll also find Library for Iranian Studies (1.8 miles east) and Lammas Park (less than half a mile north). Northfields’s nearest station is Brentford station, about 0.8 miles south of the centre. Other landmarks nearby include Gunnersbury Park House - Large Mansion (1.2 miles east) and Treaty Centre (3 miles south-west). The countryside around Northfields includes Middle Lake and Long Wood.
When it isn’t the sealant
A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be any of the following:
- Fire doors, dampers or other fire safety equipment
- Writing the fire-stopping specification
- Large openings beyond what any sealant detail covers
If in doubt, ring 01277 525 020 or send photos by email and we’ll say what we think before you book.
Joints and surfaces we work on
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Cable penetrations
- Pipe penetrations
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows