Cricklewood fire stopping
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Cricklewood and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Non-fire-rated filler around services
- Unsealed joints where partitions meet the slab
- Fire stopping installed outside its tested range
Fire stopping for Cricklewood sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
FAQs: Cricklewood
Does your area include sites such as The Quadrant Business Centre, near Cricklewood?
Yes. We cover Cricklewood and the area around it, including industrial estates, business parks and retail parks such as The Quadrant Business Centre. To start, just ring 01277 525 020 or send photos by email with the unit, the joints involved and your access times.
What happens to BS 476 references for fire stopping in Cricklewood?
References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is 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.
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. Removing asbestos is a job for asbestos specialists, not us.
Is the work guaranteed?
Yes. Workmanship is guaranteed for 12 months on every job.
Do you hold CHAS accreditation?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.
Can staff carry on working while you’re here?
In most cases, yes. We phase the work so most of the building stays in use.
Do you work to architects’ specifications?
Yes. Send it with your enquiry, and the quote will be based on it.
Fire stopping for commercial buildings in Cricklewood
For main contractors, our fire stopping package slots in after the M&E trades have finished in an area. To price a package, phone 01277 525 020 or use the quote form with the schedule or marked-up drawings and the specified product data. Tell us what records you need and we will confirm with the quote. If you are dealing with openings found when ceilings come down for a refit and fire stopping installed outside its tested range, we can put it right, on cable penetrations, linear gaps at wall heads and pipe penetrations alike. Whoever orders the work in Cricklewood, the brief is normally the same: a clear scope, tidy work and joints that don’t fail again.
In a London area such as Cricklewood, buildings are refitted often, and every new cable, pipe or duct through a fire-resisting wall or floor leaves a gap. Each service penetration gets fire-rated or intumescent sealant if that’s what is specified, laid to the product’s tested arrangement.
Every job we finish is backed by a 12-month workmanship guarantee, in Cricklewood as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Where
- Cricklewood (NW2, NW6, NW10)
- Wider area
- Greater London
- Cover
- A 12-month guarantee
- Price
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
What we can’t put right
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Fire risk assessments, a job for a competent assessor
- Approving the work on behalf of building control
- Openings that need collars, wraps, batts or boards rather than sealant
Not sure which it is? You can give us a call on 01277 525 020 or email the details over and we’ll tell you honestly before you book.
What we seal
- Small duct penetrations where the tested detail allows
- Cable penetrations
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Pipe penetrations
- Linear gaps at wall heads
General trades versus a specialist
For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.
Why it’s worth doing now in Cricklewood
Open penetrations multiply: each new service adds to the list. Keeping on top of it after each round of works keeps the job small and avoids a much larger catch-up later. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.
A quote for service penetrations depends on quantities, condition and access, and any specification that applies. Ask us for a fixed quote.
Why appoint us
- 12 months’ guarantee on every job
- Work to your specification and the manufacturer’s guidance
- Over 20 years of commercial sealing
- CHAS accredited
Take a look at how commercial sealant jobs are priced or our accreditations and insurance.
How a job runs
Where the site stays busy, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed before we move to the next. In Cricklewood, 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.
- The specification and schedule come first, so we know which details apply.
- Access, permits and the order of areas are agreed with the site team.
- We compare every service penetration with its tested detail before sealing.
- Unsuitable material is removed and the opening cleaned so the seal starts clean.
- Backing and fire-rated sealant are installed to the detail and tooled.
- We tell you about openings that need a different product.
Preparing the site
- Have the specification and drawings to hand
- Tell us what induction or permit system the site runs
- Warn occupants and staff about the work
Getting a fixed quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photographs and a description will do.
Advice
What we are called out for in Cricklewood
Head-of-wall joints and wall-to-wall junctions are frequent weak points. Deflection and building movement can open these gaps. The tested detail for a linear joint states the width and movement it covers.
If one of these sounds familiar, it’s time for a closer look:
- Expanding foam used as fire stopping
- Openings found when ceilings come down for a refit
- Improvised or mixed-product fire seals
- Penetration schedules that need working through
For a hospital such as Royal Free Hospital (2.2 miles east of Cricklewood), penetration sealing is normally phased ward by ward, with infection-control rules agreed first.
Questions to ask before you book
- Will CSCS-carded applicators be on site?
- Their approach to joint depth and backing
- How long is the guarantee, and what does it include?
- Are they CHAS accredited or on Constructionline?
Also near Cricklewood
What else we do in Cricklewood
Looking after the joints
Regular inspection catches problems early. Specifically:
- Don’t let anyone top up a fire seal with the wrong product
- Include service cupboards in routine inspections
- Put resealing into every M&E and fit-out package
- Ask which product is in place before decorating
After every round of M&E works, check that the openings created have been sealed. Building it into each contractor’s sign-off keeps the walls intact.
Looking at service areas on a regular cycle pays off. A cracked or disturbed seal found early is a small job compared with dozens found at once.
Fire-rated sealing for Cricklewood buildings
For England, the fire stopping of penetrations is dealt with in Approved Document B. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. Cricklewood has three care or nursing homes no more than 2 miles away. In a care home, any new pipe or cable through a fire-resisting wall should be sealed to the specified detail. We install fire-rated sealant to the tested detail where it is specified.
Tenant changes at parks like The Quadrant Business Centre, 1.1 miles to the south-east of Cricklewood, bring new data and services, and openings through fire-resisting walls need the specified seal. At a university such as Imperial College London (2.8 miles south of Cricklewood), labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work.
Cricklewood is about 1 mile north-west of Kilburn, in Greater London. Businesses, contractors and managing agents in Cricklewood use us for work on service penetrations, as part of our coverage of Greater London. Our Greater London coverage takes in 764 places, from busy centres to rural villages. We also cover London, some 7 miles away.
We take on service penetrations across the NW2, NW6 and NW10 postcode area. We cover commercial and managed buildings on Ivy Road, Walm Lane and Dean Road. You will find Cricklewood on or near the A407. We also cover Brondesbury (1 mile south-east), Willesden (1 mile south-west), Dollis Hill (1 mile north-west), Willesden Green (1 mile south-west) and Neasden (1 mile west). Bigger towns within reach include London (7 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles east).
Around Cricklewood
In Cricklewood, that means premises near Hampstead School, The Crown Public House and Gladstone Park, among other places. There’s a railway station in Cricklewood itself: Cricklewood station. A little further out are St Andrew's Hospital (0.8 miles north-west) and Brent Museum and Archives (0.7 miles south-west). Green spaces nearby include Parliament Hill and Westbere Copse.