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

Fire stopping in Adelphi

Fire stopping in Adelphi, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Seals that don’t match their tested detail
  • Fire sealant pulled out of the opening
  • Snag lists that include open service penetrations
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Fire stopping for Adelphi sites

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 Adelphi

Fire-rated sealant suits many small service penetrations: copper and steel pipes, cables and some small ducts where the tested detail allows. Other openings need collars, wraps, batts, pillows or boards. If the detail calls for something other than sealant, we say so rather than force sealant into it. Site teams most often ask us about fire-rated sealant that has cracked or shrunk back and hidden openings found during inspections, across cable penetrations, small duct penetrations where the tested detail allows and linear gaps at wall heads. One point of contact handles commercial sealant work in Adelphi from the first photographs to the final walk-round, for single jobs and planned programmes alike.

In a London area such as Adelphi, 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.

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.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Adelphi (W1D, W1F, WC2H)
Wider area
Greater London
Cover
A 12-month guarantee
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026

What affects the price in Adelphi

Quotes vary with the job. Expect it to depend on:

  • How accessible the joints are
  • Quantities, in metres or numbers
  • Travel to remote or island sites
  • Backing rod, priming and other preparation

What a job costs comes down to the quantity of joints, what has to come out first and how the joints are reached. Call for a fixed quote once you have the details.

What to include in your enquiry

A few photographs plus some basic facts will normally do. It helps to include:

  • A wide shot and a close-up of the area
  • Any dates the work must fit around
  • What the building is and how it’s used
  • Asbestos survey details if the building is older

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to call the office on 01277 525 020 or email us with what you know.

Maintenance after handover

Regular inspection catches problems early. Specifically:

  • Keep general-purpose fillers away from compartment walls
  • Keep product data and details in the fire safety file
  • Arrange inspection before areas are covered up
  • Treat an open penetration as a priority repair

Never top up a fire seal with foam, ordinary silicone or filler. A repair should use the original product, installed the same way unless the designer specifies otherwise.

The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. That way the opening is sealed while the trade and access are still there instead of being left for someone else.

Building owners, agents and FMs in Adelphi

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Sites in Adelphi can sit alongside others in a wider programme across Greater London.

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.

When to call us in Adelphi

Physical damage is another reason seals stop doing their job. Seals get knocked during maintenance, cut back to add a cable or pulled out when services are swapped, and the repair is often skipped.

Typical triggers for a call:

  • Fire stopping installed outside its tested range
  • Penetration schedules that need working through
  • Old intumescent sealant that has split away
  • Open linear gaps along the top of fire-resisting walls

In a retail centre such as Brunswick Centre, which lies north of Adelphi, any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail.

What your quote should include

  • The terms of the workmanship guarantee
  • Whether old or failed sealant will be cut out, not overlaid
  • Who will actually carry out the work
  • Can the work be phased to keep areas open?

Choosing a commercial sealant contractor

Should maintenance staff do it?

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

Diagnose, treat, sign off

A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. On site, the work normally takes a single visit for a short list of penetrations, or a phased programme for a whole building, and we clear our waste as we work. Planning a London job such as one in Adelphi 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 will schedule to suit.

  1. We read the specification, drawings or penetration schedule you send.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  3. Unsuitable fillers and loose debris are taken out of each opening.
  4. Mineral wool or other backing goes in wherever the detail asks.
  5. Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

Before we start on site

  • For older buildings, check the asbestos register before work
  • Let us know about inductions and permits
  • Tell staff and tenants when we will be in

Ask for a quote

The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or speak to us on 01277 525 020 or email us if you’d rather talk the job through.

Get a quick quote

Advice

Common questions from Adelphi clients

Do you work in occupied care homes around Adelphi?

Yes. We agree rooms and times with the manager and work a few areas at a time. Any site rules, from signing in to infection control, are agreed before we start.

Can you seal penetrations in a hotel in Adelphi after a refit?

Yes, where fire-rated sealant is the specified product. We match the product to the wall or floor and the services, and say if something other than sealant is needed.

Do you take on small jobs?

Small jobs are welcome alongside larger packages. Photos and a description are enough to start.

Can you quote from photographs?

Many jobs can be quoted from photos, drawings or a joint schedule. If the job needs a look first, we’ll arrange a visit.

How do we ask for a quote?

You can use the quote form on this site; alternatively, phone 01277 525 020 or send details through our quote form. Include photographs or drawings if you have them.

Is the work guaranteed?

Yes. It runs for twelve months and covers how we prepared and sealed the joints, though not damage or work by other trades.

How long does a job like this take?

It depends on the scope, but the work usually takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence. Larger or phased jobs take longer, and we will give you a timescale with the quote.

Service penetrations in Adelphi buildings

In London buildings, frequent fit-outs and M&E changes are a common reason fire stopping gets breached. Penetrations are sealed with the specified product, to its tested detail, under the building’s own permit rules. Approved Document B is the English guidance that covers fire stopping around openings and penetrations. 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. Our part stays the same: the specified product, installed to its tested detail.

For an estates team at a campus like University of Notre Dame, which lies west of Adelphi, summer M&E works are typically followed by a round of penetration sealing. Workshops and IT rooms at colleges like Kensington College of Business, less than half a mile north of Adelphi, are re-serviced often, leaving penetrations to seal.

Adelphi is about 1 mile south-east of Marylebone, in Greater London. If you are looking for fire stopping in Adelphi, we can help. 764 places across Greater London fall within our area, including Adelphi.

Business premises anywhere in W1D, W1F and WC2H are within our area. Buildings on York Road, Drury Lane and Maiden Lane are within our area. You’ll find Adelphi on or near the A301 and A400, so getting applicators and materials to site is simple. Close to Adelphi, our area also takes in Covent Garden (1 mile north), Charing Cross (1 mile south-west), Aldwych (1 mile north-east), Seven Dials (1 mile north-west) and West End (1 mile north-west). A short drive away, we cover Kensington (3 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).

Landmarks near Adelphi

Recent enquiries here include premises near The BFI Reuben Library, St Andrew's and St John's Church of England Primary School and London Nautical School. You’ll also find Victoria Embankment Gardens (under half a mile south) and The Theodore Bullfrog pub (under half a mile south-west). Adelphi has its own railway station: London Charing Cross station. A little further out are London Museum and Institute of Natural History (less than half a mile north-east) and Montfichet's Tower (1 mile east). Open spaces near Adelphi include St. James's Park Lake and Barnsbury Wood.

Map of Adelphi © OpenStreetMap contributors
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