Fire stopping in Barnet
Need fire stopping in Barnet? It’s simple: send details, get a quote, we seal, guaranteed.
- Penetration schedules that need working through
- Fire stopping installed outside its tested range
- Openings left by services added after handover
Fire stopping near Barnet
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
FAQs: Barnet
Do you work in London buildings with loading restrictions?
Yes, most London buildings have access rules of some kind, and we plan around them. Send the building rules and access times with your enquiry. We allow for the ULEZ, which covers every borough
Can you work in a care home near Barnet with residents in?
Yes. Care settings are planned area by area, at times agreed with the home. We follow the home’s own procedures throughout.
Is it fine to apply new sealant on top of old?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
What if there’s asbestos in the old mastic?
Managing asbestos is the dutyholder’s responsibility, so for older buildings we ask for the asbestos register first. Work pauses if suspect material is found, until it has been tested.
What site paperwork can you supply?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.
Are you insured?
Yes. We are fully insured, and the certificate can go with your quote.
Can you tell us what fire stopping our building needs?
No. Deciding what is needed sits with the designer, fire engineer and building control. Our role is fitting the specified fire-rated sealant, following the maker’s tested details.
Fire stopping for commercial buildings in Barnet
A fire-rated sealant is only one part of a tested system: the evidence covers a specific product, wall or floor type, service, gap, depth and backing. We match each opening to that detail before any sealant goes in, and we say so if it doesn’t fit. If you have builders’ foam or ordinary silicone in compartment walls and fire-stopping items raised at inspection or handover, we can put it right, whatever the surface. For commercial sealant work in Barnet, you deal with one contact from quote to sign-off, 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 is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Place
- Barnet (EN5, EN4, N20, N11)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Different surfaces, different methods
Plastic pipes
In a fire, plastic pipework melts away and leaves an opening. Some intumescent sealants are tested on smaller plastic pipes. We confirm material and size first and tell you if sealant isn’t the right product.
Masonry and concrete
Openings through concrete vary from tidy cores to rough break-outs. The gap is measured at the widest point against the detail’s limits, and any outside it are raised with you.
When it isn’t the sealant
Honesty saves time and money. New sealant won’t cure:
- Fire risk assessments, a job for a competent assessor
- Plastic pipes whose detail calls for a collar or wrap
- Writing the fire-stopping specification
If you are not sure, just phone 01277 525 020 or email the details over and we will give you a straight answer.
Joints and surfaces we work on
- Linear gaps at wall heads
- Service gaps in risers
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Pipe penetrations
- Joints between fire-resisting walls and floors
What sets the cost
What shapes the price:
- The total length or number of joints
- Which sealant the job calls for
- Working within restricted access windows
- Joint width, depth and condition
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
Before you send an enquiry
The more we know, the firmer the quote. Helpful details to send:
- Drawings or a marked-up plan, if available
- Whether an asbestos survey exists
- Your programme or deadline
- The site address and postcode
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.
Fire-rated sealing for Barnet buildings
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. Our part stays the same: the specified product, installed to its tested detail. Barnet has a number of hotels close by, all within 2 miles. In hotels, bedroom and corridor walls are usually fire-resisting, so services added in a refit need sealing with the specified product.
Shop fits in centres such as Spires Shopping Centre, 0.9 miles to the north-west of Barnet, can bring new services through fire-resisting walls between units, which then need the specified seal. For a site team at a college like Oak Hill College, which lies east of Barnet, fire-rated sealing is best scheduled after the summer works. Theatres, wards and plant rooms at sites like Barnet Hospital (to the west of Barnet) all have compartment walls crossed by services.
Barnet is about 9 miles east of Watford, in Greater London. Any commercial site in Barnet is covered. Our Greater London coverage takes in 764 places. For work in that direction, see our London page (11 miles or so).
We cover the EN5, EN4, N20 and N11 postcode districts for service penetrations. We cover commercial and managed buildings on Station Road, High Street and Sambroke Square and the roads nearby. Access to Barnet is via the B193 and A1081 among other routes. We also cover Underhill (1 mile west), New Barnet (1 mile east), Monken Hadley (1 mile north-west), Hadley Wood (1 mile north-east) and Cockfosters (1 mile east). Further afield, our area takes in London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (9 miles south) and Shoreditch (10 miles south-east).
Around Barnet
Locally, jobs take us to sites close to Queen Elizabeth's Girls' School, The Railway Tavern and Highlands Gardens. The closest station to Barnet is New Barnet station, roughly 0.6 miles east of the centre. A little further out are Barnet General Hospital (1.2 miles west) and Francis Skaryna Belarusian Library and Museum (2.1 miles south). Not far away are Darland's Lake and Greenhill Gardens.
Nearby places to Barnet
Other services in Barnet
Maintenance after handover
Problems stay small when the joints are checked regularly. In particular:
- Have penetrations checked while they can still be seen
- Settle who seals which penetrations at the start of a project
- Keep product data and details in the fire safety file
- Ask which product is in place before decorating
Give the sealant its full cure time before ceilings, boxing or decoration go over it. Not every fire-rated product can be painted.
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.
From enquiry to sign-off
Tell us your site hours and access windows and we’ll plan around them. 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. All of Greater London is in the ULEZ, and kerbside space in Barnet can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- First we confirm the product and tested details named in the specification.
- Openings are measured and grouped by detail.
- Improvised fillers and failed sealant are removed.
- Mineral wool or other backing is fitted where required.
- We gun the sealant in to the specified depth around each service and tool it.
- Completed areas are checked with you, with the records agreed when we quoted.
What we need from you
- Have the specification and drawings to hand
- Agree which areas must stay open
- Let building users know which areas are affected
Get a fixed quote
Let us know the site, the scope and your timescale, and we will put a fixed quote together. To get it moving, speak to us on 01277 525 020 or email the details over.
Related advice
Why it’s worth doing now in Barnet
An improvised seal can look finished while offering no tested performance. The fix is to remove it and reinstall to the detail, so it makes sense to get it right first time. In a London building, a failed joint rarely affects only one party. Putting it right early is less disruptive than dealing with the consequences.
Pricing service penetrations depends on how many there are, their condition and the access. Call for a quote.
Why appoint us
- Constructionline member for supplier checks
- Over 20 years of commercial sealing
- 12 months’ guarantee on every job
- Work to your specification and the manufacturer’s guidance