Fire Stopping in Haverstock
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Haverstock and nearby, by CSCS-carded applicators. Fully insured and CHAS accredited.
- Builders’ foam or ordinary silicone in compartment walls
- Seals disturbed by maintenance and left open
- Fire sealant pulled out of the opening
Fire stopping across Haverstock
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Leave it or put it right?
It is cheaper to seal service penetrations as each services package finishes than to come back for them later. Openings are visible, access is open and nothing has to be taken down. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Why clients in Haverstock choose us
- Old sealant cut out, never sealed over
- Health and safety: CHAS accredited
- Workmanship guaranteed for 12 months
- CSCS-carded applicators
Take a look at our cost guide or our accreditations.
Fire stopping in Haverstock
A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls, and they are easy to forget. Those on your schedule are closed with the specified product. If you have snag lists that include open service penetrations and openings left by services added after handover, we can put it right, on small duct penetrations where the tested detail allows, cable penetrations and service gaps in risers alike. Facilities teams, main contractors and managing agents in Haverstock tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
London has many occupied offices, blocks and mixed-use buildings where services are added and rerouted all the time. Where the specification names fire-rated sealant, it goes in exactly as the manufacturer’s test evidence shows for that wall or floor.
What our 12-month guarantee covers is the way we did the job: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Location
- Haverstock (NW3, NW5, NW1)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Also near Haverstock
What else we do in Haverstock
From enquiry to sign-off
Working in a building that stays open takes some planning. We sign and contain the area we’re in, keep walkways clear and work section by section so the rest of the building stays in use. Most London premises stay occupied while we’re on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First we confirm the product and tested details named in the specification.
- We sort the openings by the detail each one needs.
- 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.
- Completed areas are checked with you, with the records agreed when we quoted.
Before we start on site
- Tell staff and tenants when we will be in
- Have the specification and drawings to hand
- Flag any permit to work we’ll need
Quotes
Pricing a project or setting a maintenance budget? We’ll quote against your scope and drawings that you can work with. If you have questions first, speak to us on 01277 525 020 or email the details over.
Advice
What we are called out for in Haverstock
Mixing products or improvising a detail breaks the link with the test evidence. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are the usual culprits.
Things that normally lead to an enquiry:
- Fire sealant pulled out of the opening
- Head-of-wall gaps with no fire seal
- Penetration schedules that need working through
- Service penetrations left open after M&E works
Residences at universities like Regent's University London (1.4 miles south of Haverstock) have compartment walls that must be resealed whenever services change.
What to look for in a quote
- Proof of insurance
- Will failed sealant be removed rather than covered?
- The named product and why it was chosen
- Whether their applicators hold CSCS cards
Quoting for work in Haverstock
Each job is priced on its own details. The main factors are:
- How much existing material needs removing
- Phasing around occupants
- How accessible the joints are
- Specialist products, such as fire-rated or hygienic sealants
A quote for service penetrations depends on how many there are, their condition and the access. Ask us for a fixed quote.
What to include in your enquiry
A few photos plus some basic facts will normally do. It helps to include:
- Drawings or a marked-up plan, if available
- Whether the building will be occupied during the work
- Whether an asbestos survey exists
- Anything awkward about access or site hours
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, call 01277 525 020 or use the quote form.
Fire stopping in Haverstock: the local picture
London’s office and residential buildings are refitted constantly, and each round of cabling or pipework can leave open penetrations. We seal to the specification and the product’s tested detail, working within the building’s permits. Approved Document B is the English guidance that covers fire stopping around openings and penetrations. 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. Our part stays the same: the specified product, installed to its tested detail.
On a hospital site such as Royal Free Hospital, 0.6 miles north of Haverstock, fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits. For a building at a site such as Regis Road Business Park, which lies north-east of Haverstock, a check of penetration seals after each fit-out is good practice.
Haverstock is about 1 mile south-east of Hampstead, in Greater London. Across the NW3 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 764 places in Greater London, large and small.
Anyone looking for fire stopping in NW3, NW5 and NW1 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. If your site is on Eton Road, Lawn Road and Ornan Road or close by, we can quote for service penetrations. We also cover Belsize Park (1 mile north), Primrose Hill (1 mile south), South Hampstead (1 mile west), Swiss Cottage (1 mile west) and Chalk Farm (1 mile east) for service penetrations. Nearby towns on our patch include London (4 miles south-east), Kensington (4 miles south-west), Shoreditch (4 miles east), Walthamstow (7 miles north-east), Hoxton (3 miles east) and Whitechapel (4 miles south-east).
Landmarks near Haverstock
In Haverstock, that means premises near Cecil Sharp House, Primrose Hill and St. Mary's Town and Country School. You will also find St Paul's Church of England Primary School (under half a mile south) and The Washington pub (less than half a mile north). For rail, the closest station is South Hampstead station, about 0.7 miles west of the centre. Nearby you’ll also find Wellington Hospital (0.9 miles south-west) and Isokon Gallery (0.5 miles north). For a walk, there’s Adelaide Nature Reserve and Primrose Hill.
When it isn’t the sealant
A proper diagnosis includes knowing what sealant can’t do. You will hear from us if the cause turns out to be one of these:
- Openings that need collars, wraps, batts or boards rather than sealant
- Issuing fire ratings or certificates for seals
- Deciding what a wall or floor needs, which belongs to the designer
If in doubt, phone 01277 525 020 or use the quote form and we will say what we think before you book.
What we seal
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
- Cable penetrations
- Pipe penetrations
Surface by surface
Masonry and concrete
Block walls and concrete floors are common substrates for penetration seals. Dust and debris are cleared from the opening, with backing added if the detail requires it.
Cables and cable bundles
Data cabling added after handover is a regular cause of open service penetrations. Openings around new cables are resealed to the detail, and we tell you if the bundle exceeds what sealant covers.
Haverstock: questions and answers
Could you schedule work at a campus like Regent's University London for the vacation?
Yes, holiday working periods are the norm on campus jobs. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Can you work on a hospital site such as Royal Free Hospital?
Yes, healthcare and care buildings are part of our work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Is your workmanship covered by a guarantee?
Yes, for 12 months. If our installation fails in that time, we return and fix it.
How long do sealant joints last?
It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.
How long before the joints can be used?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Will you sign off the seals for us?
No. Approval sits with the designer, principal designer or building control. We will confirm the products and details used, and you can tell us what other records you need at quote stage.
Can you fire stop behind the services contractors?
Yes, where there is a specification for those walls and floors. Openings left by new services are among the most common jobs we see.