Fire-rated sealing and fire stopping in Bishopsgate, City of London
We carry out fire-rated and intumescent sealing of service penetrations and linear gaps in Bishopsgate. Send details for a fixed quote.
- Fire sealant pulled out of the opening
- Unsealed openings around new pipes and cables
- Fire stopping installed outside its tested range
Fire stopping for businesses in Bishopsgate
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Different surfaces, different methods
Masonry and concrete
Core-drilled holes are neat; broken-out ones rarely are. The gap is measured at the widest point so we know it sits within the tested range, and any outside it are raised with you.
Drylining partitions
Holes in board are often cut larger than needed. If the gap exceeds the tested range, sealant alone won’t do and we’ll tell you what the detail says instead.
About our fire stopping in Bishopsgate
A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. Each new cable, pipe or data route cut through a fire-resisting wall leaves an opening behind. We close the openings listed on your schedule, using the specified sealant and detail. If you’re dealing with unsealed openings around new pipes and cables and fire stopping installed outside its tested range, we can put it right. Most enquiries from Bishopsgate start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.
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 stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.
- Location
- Bishopsgate (E1, EC2A, EC1Y)
- Region
- City of London
- Guarantee
- 12 months on every job
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What sets the cost
Quotes vary with the job. It mainly depends on:
- Induction, permit and paperwork requirements
- Working within restricted access windows
- Whether old sealant has to be cut out first
- Location, for remote and island sites
Pricing service penetrations depends on quantities, condition and access, and any specification that applies. Call for a quote.
What to include in your enquiry
To price the job accurately, we need to understand the site. Useful things to include:
- Any specification or named product
- A wide shot and a close-up of the area
- Asbestos survey details if the building is older
- The type of building and who uses it
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote you can plan around. If you have questions first, speak to us on 01277 525 020 or send details through our quote form.
General trades versus a specialist
For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
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, which is what makes a joint last.
How a job runs
Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and move on in phases so staff and visitors can carry on around us. In Bishopsgate, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.
- First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
- 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.
- We fit the backing the detail asks for, to the stated depth.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
What we need from you
- Point out any areas we must not close
- Let building users know which areas are affected
- Move anything stored against the joints
Request a quote
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
Advice
Places near Bishopsgate
What else we do in Bishopsgate
When something else is needed
Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is one of these:
- Walls or floors that aren’t fire-resisting to begin with
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Large openings beyond what any sealant detail covers
If you’re not sure, just ring 01277 525 020 or email us and we will give you a straight answer before you book.
What we seal
- Pipe penetrations
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Small duct penetrations where the tested detail allows
- Cable penetrations
- Linear gaps at wall heads
Keeping the joints sound
Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. We suggest:
- Agree the fire-stopping specification before services go in
- Record which product was used where
- Report damaged or disturbed seals as soon as they’re spotted
- Get seals inspected before ceilings and boxing close
After every round of M&E works, check that the openings created have been sealed. A short check at the end of each job saves a long hunt later.
Ask every contractor who works in risers or voids to report openings they create. Small habits like this stop openings building up.
Where services cross fire walls in Bishopsgate
Nine care or nursing homes sit less than 2 miles from Bishopsgate. Care settings depend on compartmentation, so service penetrations made during maintenance or refurbishment need sealing with the specified product. We install fire-rated sealant to the tested detail where it is specified. A 2-mile radius around Bishopsgate takes in a good number of hotels. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal.
Colleges such as London College of Marketing and Technology, less than half a mile east of Bishopsgate, add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product. For a unit at a centre such as Anchor Retail Park, 1.4 miles to the east of Bishopsgate, penetration seals are worth checking after each shop fit. Residences at universities like Coventry University London Campus (to the north-east of Bishopsgate) have compartment walls that must be resealed whenever services change.
Bishopsgate is about 1 mile north-east of London, in City of London. Across the E1 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Across City of London, 7 places are covered, including Bishopsgate.
Work on service penetrations is covered throughout E1, EC2A and EC1Y, for business premises of every kind. Among the streets we cover are Bush Lane, Swan Lane and Love Lane. Bishopsgate sits on or close to the A3 and A10, which helps when planning parking and deliveries for the job. Just outside Bishopsgate, we also work in Aldgate (1 mile south-east), Spitalfields (1 mile east), City of London (1 mile west), Tower Hill (1 mile south) and Whitechapel (1 mile east).
Around Bishopsgate
Recent enquiries here include premises near St Mary-at-Hill, Finsbury Circus and White Hart pub, among other places. Other local landmarks include The Aldgate School (less than half a mile south-east), Bishopsgate Institute Special Collections and Archives (less than half a mile north-east) and Central Foundation Boys' School (0.7 miles north). Bishopsgate has its own railway station: London Liverpool Street station. A little further out are Tower of London (0.6 miles south-east) and Gabriel's Wharf (1.2 miles south-west). Not far away are Lavender Pond and Tower Hill.
Bishopsgate: questions and answers
Is a hospital such as London Bridge Hospital somewhere you can work?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Can you work in a London building with booked loading and goods-lift slots?
Yes, we plan every London job around the building’s own access rules. Share the building’s contractor rules and we’ll work to them. We allow for the ULEZ, which covers every borough
Is the BS 476 change in 2029 relevant to fire stopping?
It mainly affects England, where Approved Document B is dropping its BS 476 references from 2 September 2029. Classification to BS EN 13501-2 becomes the expected evidence. Scotland follows its own Technical Handbook.
How do you deal with asbestos in old sealant?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. 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. We don’t remove asbestos-containing materials.
Do you need to see the site first?
Many jobs can be quoted from photos, drawings or a joint schedule. If the job needs a look first, we will arrange a visit.
Will you write the fire-stopping specification?
No, that isn’t our role. With the designer’s details in hand, we can price the sealant elements.
Which standards are fire seals tested to?
BS EN 1366-3 covers penetration seals and BS EN 1366-4 covers linear joints. Classification follows BS EN 13501-2. The rating applies to the product as tested.