Fire-rated sealing and fire stopping in Northolt, Greater London
Need fire stopping in Northolt? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Fire sealant pulled out of the opening
- Builders’ foam or ordinary silicone in compartment walls
- Snag lists that include open service penetrations
Fire stopping for Northolt sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our fire stopping in Northolt
For main contractors, our fire stopping package slots in after the M&E trades have finished in an area. To price a package, call the office on 01277 525 020 or email a schedule or drawings with the schedule or marked-up drawings alongside the manufacturer’s details. Tell us what records you need and we will confirm with the quote. The enquiries we see most involve openings found when ceilings come down for a refit and expanding foam used as fire stopping, across small duct penetrations where the tested detail allows, cable penetrations and joints between fire-resisting walls and floors. Facilities teams, main contractors and managing agents in Northolt tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
In London, higher-risk residential buildings under the Building Safety Act bring extra scrutiny of fire-stopping records. Our part is installing the specified fire-rated sealant; tell us what records you need and we will confirm with the quote.
Every job we finish is backed by a 12-month workmanship guarantee. If our installation lets you down in that time, we return and fix it.
- Location
- Northolt (UB5, UB6)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
What sets the cost
We price every job individually. The main factors are:
- Travel to remote or island sites
- Phasing around occupants
- Quantities, in metres or numbers
- Any access equipment needed
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a fixed quote.
What to include in your enquiry
Diagnosis starts before we arrive. Tell us:
- Clear photos of the problem areas
- Whether an asbestos survey exists
- Any specification or named product
- Whether the building will be occupied during the work
For a fixed quote, speak to us on 01277 525 020 or email drawings and photos. You can also send details through our quote form.
FAQs: Northolt
Do you work in occupied care homes around Northolt?
Yes. We agree rooms and times with the manager and work a few areas at a time. Noise and disruption are kept to a minimum.
What does the BS 476 change mean for fire-rated sealant in Northolt?
Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
Which sealant will you use?
The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
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.
Can weather delay the job?
Outside, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.
Are you CHAS accredited?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.
How soon can the area be used again?
Curing time varies by product, and we confirm it on the day.
Different surfaces, different methods
Cables and cable bundles
New data and power cables are the most common breach we see. Openings around new cables are resealed to the detail, and we tell you if the bundle exceeds what sealant covers.
Small ducts
Ducts are only sealed with sealant where the detail allows it. The ductwork, its supports and any dampers are for the ductwork contractor.
On site: what to expect
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 we check in with your contact before moving on to each new area. Planning a London job such as one in Northolt starts with access: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we’ll schedule to suit.
- First we go through the drawings, schedule or specification for the seals.
- On site, each opening is checked against the tested detail it is meant to follow.
- Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
- Mineral wool or other backing goes in wherever the detail asks.
- We apply the specified sealant to the depth and around the services as the detail shows.
- If an opening needs something other than sealant, we tell you instead of improvising.
What we need from you
- Arrange parking or a loading space
- Tell us what induction or permit system the site runs
- Move anything stored against the joints
Quotes
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, speak to us on 01277 525 020 or send photos by email.
Read more
What we can’t put right
A proper diagnosis includes knowing what sealant can’t do. You will hear from us if the cause turns out to be any of the following:
- Signing off or certifying a building’s fire stopping
- Deciding what a wall or floor needs, which belongs to the designer
- Fire doors, dampers or other fire safety equipment
If you are not sure, just phone 01277 525 020 or send details through our quote form and we will give you a straight answer.
Joints and surfaces we work on
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Cable penetrations
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
- Pipe penetrations
Building owners, agents and FMs in Northolt
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Northolt can form part of a wider programme across Greater London.
Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
Also near Northolt
Also in Northolt
Maintenance after handover
Once the work is signed off, these steps help:
- Leave fire sealant to cure fully before covering it
- Treat an open penetration as a priority repair
- Put resealing into every M&E and fit-out package
- Keep general-purpose fillers away from compartment walls
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, and report them promptly.
Write fire stopping into the scope of any work crossing a compartment wall or floor. Then the seal goes in while the area is open instead of being left for someone else.
Fire stopping in Northolt: the local picture
In England, Approved Document B covers fire stopping of openings and penetrations. 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. Either way, we install the specified product to its tested detail. Northolt has several hotels close by, all within 2 miles. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close.
Where a unit on an estate such as Northolt Industrial Estate, less than half a mile to the south-east of Northolt, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail. For a unit at a centre such as Victoria Retail park (0.8 miles north-west of Northolt), penetration seals are worth checking after each shop fit. Theatres, wards and plant rooms at sites like Cygnet Hospital, 1.9 miles to the north-east of Northolt, all have compartment walls crossed by services.
Northolt is about 2 miles south-west of Harrow, in Greater London. Anywhere in UB5, 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, Northolt among them. There’s a separate page for London, about 12 miles away.
Work on service penetrations is covered throughout UB5 and UB6. If your site is on Church Road, Eastcote Lane North and Tenby Gardens or close by, send details and we will quote for service penetrations. If your building is just outside Northolt, we cover South Ruislip (1 mile north-west), Greenford (1 mile south-east), South Harrow (1 mile north-east), Yeading (2 miles south-west) and Yiewsley (2 miles south-west). Further afield, our area takes in London (12 miles east), City of Westminster (10 miles east), Marylebone (10 miles east), Kensington (8 miles south-east), St Pancras (11 miles east) and Shoreditch (13 miles east).
Around Northolt
Around Northolt, our work takes us to commercial buildings near Northala Fields, The Greenwood Public House and Northolt High School. For rail, the closest station is Northolt Park station, about 0.7 miles north-east of the centre. Other landmarks nearby include Heath Robinson Museum (3.1 miles north) and Clementine Churchill Hospital (2 miles north-east). The countryside around Northolt includes Islip Manor Meadows and Northala Fields.