Fire-rated sealing and fire stopping in South Hampstead, Greater London
Fire-rated and intumescent sealing of service penetrations and linear gaps in South Hampstead. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Head-of-wall gaps with no fire seal
- Penetration schedules that need working through
- Builders’ foam or ordinary silicone in compartment walls
Fire stopping for South Hampstead sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping in South Hampstead, done properly
Facilities managers in South Hampstead often find open service penetrations when ceilings come down for other work. Where the walls and floors already have a fire-stopping specification, we can work to it, matching the product and detail it names. With no specification in place, the first step sits with your designer or fire engineer, not with us. Site teams most often ask us about fire seals cut back for extra cables and never reinstated and fire sealant pulled out of the opening, across small duct penetrations where the tested detail allows, pipe penetrations and linear gaps at wall heads. Whoever orders the work in South Hampstead, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
Taller residential buildings in London may fall under the Building Safety Act’s higher-risk regime, where fire-stopping records get close attention. Our part is installing the specified fire-rated sealant; tell us what records you need and we will confirm with the quote.
Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Place
- South Hampstead (NW3, NW8, NW6)
- Wider area
- Greater London
- Cover
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Why it’s worth doing now in South Hampstead
Fire stopping is a regular point raised at inspections and handover. Late discoveries can delay handover while openings are reopened and resealed. In a London building, a failed joint rarely affects only one party. Dealing with it early is simpler for everyone.
We don’t publish prices, because the scope varies so much from one building to the next. For a fixed figure, call for a quote and we will price your job on its own details.
Why clients in South Hampstead choose us
- A fixed quote before work starts
- Constructionline member for supplier checks
- Old sealant cut out, never sealed over
- Over 20 years of commercial sealing
Read our cost guide or our accreditations.
When to call us in South Hampstead
On a busy project, programme pressure can mean fire stopping is rushed or left to whichever trade is closest. That is how unsuitable products and improvised details end up in compartment walls, which then have to be put right.
Things that usually lead to an enquiry:
- Fire-stopping items raised at inspection or handover
- Damaged fire seals in risers and voids
- Open linear gaps along the top of fire-resisting walls
- Old intumescent sealant that has split away
Workshops and IT rooms at colleges like City of Westminster College (1.3 miles south-west of South Hampstead) are re-serviced often, leaving penetrations to seal.
Comparing quotes
- The named product and why it was chosen
- How long is the guarantee, and what does it include?
- Proof of insurance
- How the existing material will be dealt with
Different surfaces, different methods
Risers and ceiling voids
Service risers and the voids above ceilings are where openings collect. Access is often tight, so we agree it with you in advance along with any permits your site needs.
Small ducts
Small ductwork can sometimes be sealed with sealant where the tested detail includes it. Bigger ducts and fire-resisting ductwork are normally handled with other products.
Compartment walls and floors in South Hampstead
The 2 miles around South Hampstead include three care or nursing homes. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal. 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. What we install is set by the specification, and it goes in to the tested detail.
At a university such as Regent's University London, which lies south-east of South Hampstead, labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work. Hospital estates such as Hospital of St John and St Elizabeth (to the south of South Hampstead) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.
South Hampstead is about 1 mile south of Hampstead, in Greater London. We send applicators to South Hampstead for service penetrations, handled exactly as we handle every other area. 764 places across Greater London fall within our area, South Hampstead among them.
Commercial sites across NW3, NW8 and NW6 are covered for service penetrations. For a building on Avenue Road, Acacia Road and Harben Road or nearby, send details and we will quote for service penetrations. Just outside South Hampstead, we also work in Swiss Cottage (1 mile north), St John's Wood (1 mile south), Haverstock (1 mile east), Belsize Park (1 mile east) and Primrose Hill (1 mile east). Nearby towns on our patch include London (4 miles south-east), Kensington (3 miles south-west), St Pancras (3 miles south-east), Shoreditch (4 miles east), Walthamstow (7 miles north-east) and Hoxton (4 miles east).
Local landmarks in South Hampstead
Recent enquiries here include premises near Cafe Med pub, St. Mary's Town and Country School and Holy Trinity CofE Primary School and the streets around them. Other local landmarks include Cecil Sharp House (1.1 miles east) and Primrose Hill (0.6 miles east). There’s a railway station in South Hampstead itself: South Hampstead station. Other landmarks nearby include Isokon Gallery (0.8 miles north-east) and O2 Centre (0.5 miles north-west). Open spaces near South Hampstead include Adelaide Nature Reserve and The Long Water.
Our process
The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- We read the specification, drawings or penetration schedule you send.
- On site, each opening is checked against the tested detail it is meant to follow.
- Unsuitable fillers and loose debris are taken out of each opening.
- 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.
- If an opening needs something other than sealant, we tell you instead of improvising.
Before we start on site
- Send any specification or drawings in advance
- For older buildings, check the asbestos register before work
- Tell us which areas need to stay in use
Get a fixed quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, ring 01277 525 020 or use the quote form.
Advice
Also near South Hampstead
Other services in South Hampstead
Maintenance after handover
Regular inspection catches problems early. Specifically:
- Check with the data sheet before painting over fire sealant
- Report damaged or disturbed seals as soon as they’re spotted
- Check risers and ceiling voids after each round of works
- Foam or ordinary sealant is never a fire-seal repair
Add risers, plant rooms and ceiling voids to routine fire-stopping checks. Watch for cracked sealant, new services with no seal and openings that have grown and get them dealt with.
The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. Then the seal goes in while the area is open, not months later.
Owners, agents and contractors
Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. South Hampstead can form part of a wider programme across Greater London.
Your questions answered
Is Regis Road Business Park, near South Hampstead, within your area?
Yes, sites like Regis Road Business Park are within our area, along with the rest of South Hampstead. Photos and a short description are enough for a first look.
Will you plan work around the academic year at somewhere like Regent's University London?
Yes. We plan campus work around teaching, exams and residence turnarounds. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Do you take on multi-site work?
Yes. A group of buildings can go on one quote, and you deal with one contact throughout across South East England, Greater London and Scotland.
Will you write the fire-stopping specification?
No, we don’t design fire stopping. With the designer’s details in hand, we can price the sealant elements and point out anything needing another product.
Do you work to architects’ specifications?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.
Do you work in South Hampstead?
Yes. South Hampstead falls within our area, and the simplest way to start is to ring 01277 525 020 or email a schedule or drawings.
How do I request a quote?
The quote form is the simplest route, though you can also phone 01277 525 020 or email a schedule or drawings. Include photographs or drawings if you have them.