Fire-rated sealing and fire stopping in North End, Greater London
Sealant work in North End for main contractors, managing agents and facilities managers: fire-rated and intumescent sealing of service penetrations and linear gaps, quoted at a fixed price.
- Service penetrations left open after M&E works
- Fire sealant pulled out of the opening
- Unsealed penetrations discovered above suspended ceilings
Fire stopping across North End
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle fire stopping in North End
No fire sealant works on its own: its test evidence covers one product in one kind of wall or floor, with set services, gaps, depths and backing. Before we seal anything, we check the opening against the detail it is meant to follow, and raise it with you if it falls outside. We work on linear gaps at wall heads, pipe penetrations and service gaps in risers, and what we’re called in for most is openings left by services added after handover and expanding foam used as fire stopping. One point of contact handles commercial sealant work in North End from the first photographs to the final walk-round, whether it’s one building or several.
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.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Where
- North End (NW3, NW11, N2)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
When something else is needed
Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is any of the following:
- Approving the work on behalf of building control
- Deciding what a wall or floor needs, which belongs to the designer
- Reviewing a building’s overall fire safety
If in doubt, ring 01277 525 020 or use the quote form and we will say what we think.
Joints and surfaces we work on
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Pipe penetrations
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Linear gaps at wall heads
Looking after the joints
Regular inspection catches problems early. In particular:
- Ask which product is in place before decorating
- Don’t let anyone top up a fire seal with the wrong product
- Report damaged or disturbed seals as soon as they’re spotted
- File the specified details where the next contractor can find them
Keep the product data and installation details with the building’s fire safety information. Anyone resealing later needs to know which product and detail were used.
On fit-outs, get the fire-stopping specification agreed before the services go in. The designer can then choose details that suit the services planned, and the work runs in step with the M&E.
Questions we are asked in North End
Can you seal penetrations in a hotel in North End after a refit?
Yes. We install fire-rated and intumescent sealant where it is specified. Each seal follows the tested detail, and rooms are done in turn.
Can work at a site such as American University in London fit around teaching?
Yes. We plan campus work around teaching, exams and residence turnarounds. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Are you CHAS accredited and on Constructionline?
Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.
Do you cover North End?
Yes. We cover North End and the rest of Greater London. For a quote, phone 01277 525 020 or send photos by email.
How do you deal with asbestos in old sealant?
The duty to manage asbestos sits with the building’s dutyholder, so we’ll ask for the register before work on an older building. If anything suspect turns up, we stop until it’s tested.
What will the job cost?
It depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a fixed quote and we’ll price it properly.
Can one quote cover more than one building?
Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.
Owners, agents and contractors
We work for building owners and managing agents on everything from one building to a spread of sites. Several sites can go on one quote, which keeps the paperwork simple.
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.
Site staff or a sealant specialist?
Redoing a failed joint normally costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Diagnose, treat, sign off
Site rules come first: sign-in, induction and whatever permit system the building uses. Once we’re cleared to begin, we take the joints in the sequence agreed with you. Planning a London job such as one in North End 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.
- We ask for the product and detail your designer has specified.
- Openings are measured and grouped by detail.
- Improvised fillers and failed sealant are removed.
- Mineral wool or other backing is fitted where required.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- We walk the completed areas with you and confirm the records agreed at quote stage.
Before we start on site
- Flag any permit to work we’ll need
- Tell us which areas need to stay in use
- Clear stock, furniture or equipment away from the joints
Quotes
To get a fixed quote, call the office on 01277 525 020 or email the details over. You can also send details through our quote form.
Related advice
Nearby places to North End
What else we do in North End
Penetration seals near North End
Fire stopping of openings and penetrations in England falls under Approved Document B. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. What we install is set by the specification, and it goes in to the tested detail. The area within 2 miles of North End holds plenty of hotels. In hotels, bedroom and corridor walls are normally fire-resisting, so services added in a refit need sealing with the specified product.
Shop fits in centres such as O2 Centre, 1.4 miles south of North End, can bring new services through fire-resisting walls between units, which then need the specified seal. For a unit at a site such as Brent Cross Shopping Park, which lies west of North End, any new service through a fire-resisting wall should be sealed to the tested detail. For an estates team at a campus like American University in London, which lies east of North End, summer M&E works are usually followed by a round of penetration sealing.
North End is about 1 mile north of Greenhill, in Greater London. If you are looking for fire stopping in North End, we can help, as we do across Greater London. Our Greater London coverage takes in 764 places, from busy centres to rural villages. For work in that direction, see our London page, about 6 miles away.
Anyone looking for fire stopping in NW3, NW11 and N2 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Among the streets we cover are Sandy Road, Park Avenue and Platt's Lane. Access to North End is via the A502 among other routes, so getting applicators and materials to site is simple. Just outside North End, we also work in Vale of Health (1 mile south-east), Childs Hill (1 mile south-west), Golders Green (1 mile north-west), Greenhill (1 mile south) and West Hampstead (1 mile south). Bigger towns within reach include London (6 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south-east), Kensington (5 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles south-east).
Local landmarks in North End
Locally, jobs take us to sites close to The Old Bull and Bush pub, Childs Hill Park and The Henrietta Barnett School, among other places. North End’s nearest station is Hampstead Heath station, roughly 1.1 miles south-east of the centre. Other landmarks nearby include O2 Centre (1.4 miles south) and New End Hospital (0.7 miles south). For a walk, there’s Turner's Wood and Darland's Lake.
Different surfaces, different methods
Drylining partitions
Service holes through plasterboard are frequently oversized or ragged. If the gap exceeds the tested range, sealant alone won’t do, and the detail may call for board patching or another product.
Metal pipes
Copper and steel pipes are a common service penetration for fire-rated sealant. Pipe diameter, annular gap, sealant depth and any pipe insulation all have to match the detail.