Fire-rated sealing and fire stopping in Hornsey, Greater London
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Hornsey and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Seals that don’t match their tested detail
- Fire sealant pulled out of the opening
- Fire-stopping items raised at inspection or handover
Need fire stopping in Hornsey?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our fire stopping in Hornsey
Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We hold no third-party fire-stopping installer certificate and we’d rather say that up front. What we offer is careful installation of the specified sealant to its tested detail, with a 12-month guarantee on our workmanship. We work on joints between fire-resisting walls and floors, pipe penetrations and linear gaps at wall heads, and what we are called in for most is fire stopping installed outside its tested range and fire-rated sealant that has cracked or shrunk back. A single leaking joint is often how a building in Hornsey first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
London has many occupied offices, blocks and mixed-use buildings where services are added and rerouted all the time. Each service penetration gets fire-rated or intumescent sealant if that’s what is specified, laid to the product’s tested arrangement.
We sign every job off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.
- Place
- Hornsey (N8, N22)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What happens if it’s left?
A seal that doesn’t match its tested detail gives false comfort. The fix is to remove it and reinstall to the detail. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.
We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote.
What you get with us
- Fully insured, including public liability cover
- Over 20 years of commercial sealing
- A fixed quote before work starts
- CSCS-carded applicators
Read how commercial sealant jobs are priced or our accreditations.
How the job changes by surface
Risers and ceiling voids
Risers and ceiling voids hold most of a building’s service penetrations. Access is often tight, so we agree it with you in advance.
Linear joints
Linear joints run along the head of a wall, at a slab edge or between two fire-resisting elements. BS EN 1366-4 testing sets the joint widths, depths, backing and movement a seal covers, and we work within it.
When something else is needed
Being straight saves everyone time. Fresh joints won’t solve:
- Large openings beyond what any sealant detail covers
- Construction that lacks the fire resistance the seal relies on
- Signing off or certifying a building’s fire stopping
If in doubt, call 01277 525 020 or send photos by email and we’ll say what we think.
Where we work in Hornsey
- Joints between fire-resisting walls and floors
- Service gaps in risers
- Linear gaps at wall heads
- Pipe penetrations
- Cable penetrations
- Small duct penetrations where the tested detail allows
From enquiry to sign-off
Site rules come first: sign-in, induction and whatever permit system the building uses. With the paperwork done, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. For a job in Hornsey, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.
- We ask for the product and detail your designer has specified.
- Openings are measured and grouped by detail.
- Old or wrong materials are cut out.
- Where the detail needs backing, it goes in at the stated depth.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- Completed areas are checked with you, with the records agreed when we quoted.
What we need from you
- Point out any areas we must not close
- Flag any permit to work we’ll need
- Send any specification or drawings in advance
Quotes
The quickest route to a quote is a few photos and the site postcode. Upload them with the quote form, or speak to us on 01277 525 020 or use the quote form if you’d rather talk the job through.
Advice
After the work
To get the most from the new sealant:
- Foam or ordinary sealant is never a fire-seal repair
- Check risers and ceiling voids after each round of works
- Brief every trade that openings they make must be sealed
- 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.
Ask every contractor who works in risers or voids to report openings they create. Small habits like this stop openings building up.
Hornsey: questions and answers
Can you seal around new services in a hotel near Hornsey?
Yes, to the specification and the product’s tested detail. Work is done room by room so the hotel keeps trading; design and sign-off stay with the designer and building control.
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Hornsey?
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. Our part doesn’t change: the specified product, to its tested detail.
Can you work while the building is occupied?
In the majority of cases, yes. We phase the work so most of the building stays in use.
Is any job too small?
Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.
How do you deal with asbestos in old sealant?
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.
Do you offer coloured sealant?
In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We confirm what’s available for the specified product when we quote.
Do you cover Hornsey?
Yes. Sites across Hornsey are covered, and the same phone number covers every area.
Quoting for work in Hornsey
Sealant work doesn’t have a standard rate, because every site is different. What we take into account:
- Travel to remote or island sites
- Joint width, depth and condition
- Working within restricted access windows
- The product specified
The specified product makes a difference, as does the preparation each joint needs. Access, phasing and site rules also count.
Sending details for a quote
It doesn’t need to be a full survey. These details are enough to start:
- Rough lengths or quantities, or drawings if you have them
- Whether an asbestos survey exists
- Anything awkward about access or site hours
- The postcode of the building
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, call 01277 525 020 or email a schedule or drawings.
Compartments and services around Hornsey
A good number of hotels sit less than 2 miles from Hornsey. In hotels, bedroom and corridor walls are usually fire-resisting, so services added in a refit need sealing with the specified product. 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. Our part stays the same: the specified product, installed to its tested detail.
At a college such as St. Giles College, which lies south-west of Hornsey, checking penetration seals after summer M&E works is good practice. Campus buildings at universities such as American University in London, 1.9 miles south of Hornsey, see constant changes to data and services, and fire-rated sealant goes in around new penetrations where it is specified. Theatres, wards and plant rooms at sites like St Ann's Hospital, 1.3 miles east of Hornsey, all have compartment walls crossed by services.
Hornsey is about 3 miles east of Finchley, in Greater London. We send applicators to Hornsey for service penetrations, handled exactly as we handle every other area. 764 places across Greater London fall within our area, including Hornsey. We also cover London, some 6 miles away.
We cover the N8 and N22 postcode districts for service penetrations. Among the streets we cover are High Street, Brandon Place and Cross Lane, and sites on any of them can send details for a fixed quote. Close to Hornsey, our area also takes in Turnpike Lane (1 mile east), Crouch End (1 mile south-west), Stroud Green (1 mile south-east), Wood Green (1 mile north-east) and Noel Park (1 mile north-east). A short drive away, we cover London (6 miles south), City of Westminster (5 miles south), Marylebone (5 miles south), Kensington (7 miles south-west), St Pancras (4 miles south) and Shoreditch (5 miles south).
Landmarks near Hornsey
We work on buildings around Great Northern Railway pub, Priory Park and Greek Secondary School of London, among other places. Hornsey has its own railway station: Hornsey station. Nearby you’ll also find Hornsey Central Hospital (0.7 miles west) and Broomfield House Museum (2 miles north). Green spaces nearby include Darland's Lake and Highgate Hill.