The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Fire stopping in New Southgate

Planning work on a service penetration in New Southgate? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • Old intumescent sealant that has split away
  • Fire stopping installed outside its tested range
  • Fire seals cut back for extra cables and never reinstated
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Need fire stopping in New Southgate?

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

How we handle fire stopping in New Southgate

A fire-rated sealant is only one part of a tested system: 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. If you have fire stopping installed outside its tested range and fire-rated sealant that has cracked or shrunk back, we can help, whatever the surface. A specialist sealant contractor works differently from a general builder: in New Southgate, that means joint design, primers and backing rod as standard.

In a London area such as New Southgate, buildings are refitted often, and every new cable, pipe or duct through a fire-resisting wall or floor leaves a gap. Each service penetration gets fire-rated or intumescent sealant if that’s what is specified, laid to the product’s tested arrangement.

Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
New Southgate (N11, N10, N14)
Region
Greater London
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026

Why deal with it now?

The longer openings stay, the more there tend to be: every new cable or pipe adds another. Keeping on top of it after each round of works keeps the job small. Failed sealant in a building in New Southgate can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.

The specified product makes a difference, and so does the preparation. Access, phasing and site requirements come into it too.

What you get with us

  • Constructionline member for supplier checks
  • Work to your specification and the manufacturer’s guidance
  • Sealing commercial buildings since 2005
  • Clear, fixed quotes

Take a look at what affects the cost and our accreditations.

What the job involves on each surface

Metal pipes

Sealant details often cover copper and steel pipework. Pipe diameter, annular gap, sealant depth and any pipe insulation all have to match the detail.

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, including keys, permits and any isolations.

Our process

In a busy building, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed, then handed back before the next one starts. Planning a London job such as one in New Southgate starts with access: 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.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. We compare every service penetration with its tested detail before sealing.
  4. Foam, ordinary sealant and debris come out first.
  5. The specified backing and sealant go in to depth and are finished neatly.
  6. Anything outside the detail is reported to you rather than sealed.

What we need from you

  • Confirm the product named in the specification
  • Arrange parking or a loading space
  • Move anything stored against the joints

Getting a fixed quote

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.

Ask for a quote

Read more

Quoting for work in New Southgate

There’s no standard rate for sealant work, since sites vary so much. What we take into account:

  • Whether old sealant has to be cut out first
  • Distance, for remote addresses
  • Phasing around occupants
  • The total length or number of joints

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote.

Sending details for a quote

Diagnosis starts before we arrive. Tell us:

  • What the building is and how it’s used
  • Any dates the work must fit around
  • Clear photographs of the problem areas
  • Where the site is, with the postcode

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.

What we are called out for in New Southgate

On a busy project, programme pressure can mean fire stopping is rushed or left to whichever trade is closest. That is when untested combinations creep in and later need putting right.

Common reasons buildings call us in:

  • Damaged fire seals in risers and voids
  • Openings found when ceilings come down for a refit
  • Penetration schedules that need working through
  • Head-of-wall gaps with no fire seal

For a unit at a site such as Friern Bridge Retail Park, under half a mile south of New Southgate, any new service through a fire-resisting wall should be sealed to the tested detail.

Questions to ask before you book

  • Their public liability cover
  • Whether primer will be used where the manufacturer specifies it
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • The terms of the workmanship guarantee

How to choose a sealant contractor

New Southgate: questions and answers

Can work in a care setting near New Southgate go ahead while residents are there?

Yes, with the manager deciding the order and timing of rooms. Noise and disruption are kept to a minimum.

Can you cope with the access rules in a London building?

Yes. Inductions, permits and timed loading are routine for us in London. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly. All of Greater London is inside the ULEZ, and our planning allows for it

How do I request a quote?

It works in four steps: send details, get a quote, we seal, guaranteed. Step one needs little more than photographs and a postcode.

Are you insured?

Yes. We’re fully insured, including public liability cover.

Can you quote from photographs?

Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we will arrange a visit.

Is fire stopping in Scotland covered by different guidance?

Scotland sets its own building regulations, with Technical Handbooks, while England relies on Approved Document B. Wherever the site is, our work follows the specification and the tested detail.

What do BS EN 1366-3 and BS EN 13501-2 mean?

The tests are BS EN 1366-3 for penetrations and BS EN 1366-4 for linear joints, and classification is to BS EN 13501-2. EI 60 means integrity and insulation for 60 minutes in the tested arrangement and the installation has to match the test.

Owners, agents and contractors

Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

When you manage a building on behalf of an owner, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.

Compartments and services around New Southgate

There are a good number of hotels within about 2 miles of New Southgate. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close. Every new tenant in a London building tends to bring new cabling, and with it new holes through compartment walls. We seal to the specification and the product’s tested detail, working within the building’s permits.

For an estates team at a campus like American University in London, 3.9 miles to the south of New Southgate, summer M&E works are usually followed by a round of penetration sealing. Hotels like Southgate Hotel London, 1.4 miles to the north-east of New Southgate, are refurbished in phases, and each phase can open up compartment walls.

New Southgate is about 2 miles north-east of Finchley, in Greater London. Across the N11 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 764 places in Greater London, from busy centres to rural villages. For work in that direction, see our London page, about 8 miles away.

If you need fire stopping in N11, N10 and N14, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. If your site is on High Road, Orion Road and Atlas Road or close by, we can quote for service penetrations. You will find New Southgate on or near the A1003 and A1110. If your building is just outside New Southgate, we cover Friern Barnet (1 mile west), Arnos Grove (1 mile east), Bounds Green (1 mile south-east), Brunswick Park (1 mile north) and Southgate (1 mile north). Nearby towns on our patch include London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south-east).

What’s near New Southgate

Locally, jobs take us to sites close to Friern Barnet School, Ming-Ai and The Ranelagh pub. Other local landmarks include O. R. Tambo Recreation Ground (0.9 miles south-east) and Francis Skaryna Belarusian Library and Museum (1.8 miles west). New Southgate has its own railway station: New Southgate station. Well-known places in the area include Grand Arcade (1.5 miles west) and Broomfield House Museum (1.1 miles east). For a walk, there’s Barfield Allotments Nature Park and Highgate Hill.

Map of New Southgate © OpenStreetMap contributors
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