Fire-rated sealing and fire stopping in Highgate, Greater London
Fire stopping in Highgate, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Open linear gaps along the top of fire-resisting walls
- Seals disturbed by maintenance and left open
- Seals that don’t match their tested detail
Need fire stopping in Highgate?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our fire stopping in Highgate
Every service that crosses a compartment wall or floor leaves an opening, and that opening needs sealing to hold back fire and smoke. Our part is installing fire-rated and intumescent sealant at those openings and along linear gaps, where the specification calls for it. We work to the product’s tested detail for every seal, not a rule of thumb. We work on linear gaps at wall heads, joints between fire-resisting walls and floors and pipe penetrations, and the failures we’re asked to look at most are service penetrations left open after M&E works and builders’ foam or ordinary silicone in compartment walls. A specialist sealant contractor works differently from a general builder: in Highgate, that means joint design, primers and backing rod as standard.
Fit-outs and M&E works in London buildings often leave service penetrations open behind ceilings and in risers. If sealant is the specified product we fit it to its tested detail, and if the detail needs something else, you will hear it from us.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.
- Location
- Highgate (N6, N19, NW5)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
What we can’t put right
Honesty saves time and money. New sealant won’t cure:
- Writing the fire-stopping specification
- Issuing fire ratings or certificates for seals
- Gaps in walls that were never built as compartment walls
Not sure which it is? You can ring 01277 525 020 or email drawings and photos and we’ll tell you honestly before you book.
Where we work in Highgate
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Cable penetrations
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
How the quote is worked out
Each job is priced on its own details. The main factors are:
- Working within restricted access windows
- How accessible the joints are
- The size and state of each joint
- Which sealant the job calls for
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
Details that help us quote
A good diagnosis starts with the right details. Tell us:
- Whether the building will be occupied during the work
- Any dates the work must fit around
- Approximate linear metres or a joint schedule
- A wide shot and a close-up of the area
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, speak to us on 01277 525 020 or use the quote form.
Penetration seals near Highgate
Six care or nursing homes sit less than 2 miles from Highgate. Where new services have gone through compartment walls in a care setting, the gaps need the specified product. Approved Document B is the English guidance that covers fire stopping around 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. We install whatever has been specified, to the product’s tested detail.
Shop fits in centres such as Arena Shopping Park (2.1 miles east of Highgate) can bring new services through fire-resisting walls between units, which then need the specified seal. For a unit at a site such as Bush Industrial Estate, 0.9 miles south-east of Highgate, new power or data runs between office and warehouse can breach a compartment wall. For a hospital such as The Whittington Hospital, under half a mile to the south-east of Highgate, penetration sealing is normally phased ward by ward, with infection-control rules agreed first.
Highgate is about 2 miles north-east of Hampstead, in Greater London. We cover Highgate, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 764 places in Greater London, from busy centres to rural villages.
Postcode districts covered here: N6, N19 and NW5 for service penetrations. If your site is on Wood Lane, Grange Road and Talbot Road or close by, we can quote for service penetrations. Close to Highgate, our area also takes in Upper Holloway (1 mile south-east), Dartmouth Park (1 mile south), Lissenden Gardens (1 mile south), Crouch End (1 mile north-east) and Tufnell Park (1 mile south-east). Further afield, our area takes in London (5 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south), Kensington (6 miles south-west), St Pancras (3 miles south) and Shoreditch (4 miles south-east).
Around Highgate
In Highgate, that means premises near The Angel Inn, St Aloysius RC College and Whittington Park. For rail, the closest station is Upper Holloway station, about 0.9 miles south-east of the centre. Other landmarks nearby include Highgate Private Hospital (0.6 miles north-west) and Montfichet's Tower (4.4 miles south-east). The countryside around Highgate includes Darland's Lake and Parkland Walk.
Places near Highgate
Also in Highgate
Should maintenance staff do it?
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.
Work for main contractors and building owners
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Highgate can form part of a wider programme across Greater London.
Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so the building keeps working while we do.
Questions about Highgate
Is hospital work, at somewhere like The Whittington Hospital, something you do?
Yes. Healthcare sites are among the places we work. We follow the site’s permits, sign-in and infection-control procedures in every area.
How does the move away from BS 476 affect penetration seals in Highgate?
Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
Do your applicators hold CSCS cards?
Yes. We use CSCS-carded applicators.
How do you choose the sealant?
A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.
How long do sealant joints last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
What will the job cost?
Every job gets its own fixed quote. For yours, phone 01277 525 020 or email the details over.
How many days will you need on site?
The duration is planned around your programme and the access we’re given. We will give you an estimate of time on site when we quote.
From enquiry to sign-off
Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. The work itself typically takes anything from one day to a planned run of visits, depending on the number of seals and the access, and we clear our waste as we work. For a job in Highgate, access comes first. Send the building rules and access times with your enquiry.
- First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Unsuitable fillers and loose debris are taken out of each opening.
- We fit the backing the detail asks for, to the stated depth.
- We apply the specified sealant to the depth and around the services as the detail shows.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Getting the site ready
- Agree which areas must stay open
- Let us know about inductions and permits
- Confirm the product named in the specification
Get a fixed quote
Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. The easiest way is to speak to us on 01277 525 020 or email drawings and photos.
Related advice
What happens if it’s left?
Sealing behind the M&E trades area by area beats a sweep at the end. While the area is still open, every opening is easy to see and reach, and the right detail can be checked at the time. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.
Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits.
Why choose Mastic Doctor in Highgate
- CSCS-carded applicators
- Fixed quotes based on photos, drawings or a visit
- Work to your specification and the manufacturer’s guidance
- One contact handling all your sites