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

Fire-rated sealing and fire stopping in Bow, Greater London

We carry out fire-rated and intumescent sealing of service penetrations and linear gaps in Bow. Send photos or drawings for a fixed quote.

  • Unsealed openings around new pipes and cables
  • Seals that don’t match their tested detail
  • Unsealed joints where partitions meet the slab
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Fire stopping in Bow

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Maintenance after handover

For the best life from the joints:

  • Get seals inspected before ceilings and boxing close
  • Agree the fire-stopping specification before services go in
  • Record which product was used where
  • Check risers and ceiling voids after each round of works

After every round of M&E works, check that the openings created have been sealed. A short check at the end of each job saves a long hunt later.

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.

Fire stopping in Bow

We should be clear about what we do and don’t do. Deciding the specification sits with the designer, the fire engineer and building control. What we bring is careful installation of the specified sealant, to the maker’s guidance on buildings around Bow. If you are dealing with improvised or mixed-product fire seals and seals disturbed by maintenance and left open, we can help, whatever the surface. A specialist sealant contractor works differently from a general builder: in Bow, that means joint design, primers and backing rod as standard.

London has many occupied offices, blocks and mixed-use buildings where services are added and rerouted all the time. Each service penetration gets fire-rated or intumescent sealant if that’s what is specified, laid to the product’s tested arrangement.

Every job ends the same way: guaranteed. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

Place
Bow (E3)
Region
Greater London
Cover
12 months on our workmanship
Quotes
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Signs you need fire stopping in Bow

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.

These are often picked up first by site or facilities staff:

  • Head-of-wall gaps with no fire seal
  • Seals disturbed by maintenance and left open
  • Penetration schedules that need working through
  • Openings left by services added after handover

Residences at universities like Queen Mary University of London (0.7 miles south-west of Bow) have compartment walls that must be resealed whenever services change.

Before you book anyone

  • How joint depth will be controlled
  • How they handle RAMS and site documents
  • Which product they’ll use, and why it suits the joint
  • Health and safety accreditation such as CHAS

Questions to ask before you appoint anyone

FAQs: Bow

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

Yes. We work around residents’ routines, a room or two at a time. Noise and disruption are kept to a minimum.

Is Old Ford Trading Estate, near Bow, within your area?

Yes. Estates, retail parks and business parks around Bow, Old Ford Trading Estate among them, are all within reach. To start, just ring 01277 525 020 or email us with the unit, the joints involved and your access times.

Do you work to architects’ specifications?

Yes. Include it with the drawings when you ask for a quote, and we will price the work to it, flagging anything that needs clarifying.

How do I request a quote?

You can use the quote form on this site; alternatively, call the office on 01277 525 020 or email a schedule or drawings. Photos, drawings or a joint schedule help us quote quickly.

How much does the work cost?

Every job gets its own fixed quote. For yours, speak to us on 01277 525 020 or email the details over with a description of the work.

Do you work in Scotland as well as England?

Scotland sets its own building regulations, with Technical Handbooks. Either way, we install the specified sealant to its tested detail.

Who decides which product is used?

If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Site staff or a sealant specialist?

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

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

On site: what to expect

Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. For a job in Bow, access comes first: 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. We start with your penetration schedule, drawings or specification.
  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. Unsuitable material is removed and the opening cleaned.
  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.

Preparing the site

  • Arrange parking or a loading space
  • Let us know about inductions and permits
  • Make sure the joints can be reached

Quotes

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photos and a few notes.

Ask for a quote

Related advice

Where services cross fire walls in Bow

With tenants changing and fit-outs following, London buildings see service routes altered again and again. Where fire-rated sealant is specified, we install it to the tested detail under the building’s permit-to-work arrangements. 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. What we install is set by the specification, and it goes in to the tested detail.

Industrial units on estates such as Old Ford Trading Estate (less than half a mile north-east of Bow) often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal. Tenant changes at centres like Anchor Retail Park, 1.2 miles south-west of Bow, often mean new services through walls between units.

Bow is about 1 mile south-east of Hackney, in Greater London. Across the E3 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Across Greater London, 764 places are covered, including Bow.

We cover the E3 postcode districts. For a building on Trellis Square, Sheffield Square and Bromley High Street or nearby, send details and we’ll quote for service penetrations. Being close to the B142, Bow is easy to get to with materials and equipment. Sites close to Bow are covered too, including Donnybrook Quarter (1 mile north), Old Ford (1 mile north-east), Mile End (1 mile south), Fish Island (1 mile north) and Bromley-by-Bow (1 mile south-east). A short drive away, we cover London (4 miles south-west), City of Westminster (6 miles west), Marylebone (5 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Walthamstow (4 miles north).

Local landmarks in Bow

Locally, jobs take us to sites close to Lord Tredegar Public House, Grove Hall Park and Mulberry UTC, among other places. Bow’s nearest station is Hackney Wick station, roughly 0.9 miles north of the centre. A little further out are V&A East (0.9 miles north-east) and St Clement's Hospital (under half a mile south). Green spaces nearby include Hollow Pond and Old Ford Island.

Map of Bow © OpenStreetMap contributors

What we can’t put right

Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be one of these:

  • Construction that lacks the fire resistance the seal relies on
  • Issuing fire ratings or certificates for seals
  • Writing the fire-stopping specification

If you’re not sure, just call 01277 525 020 or email us and we will give you a straight answer.

Surfaces we seal

  • Linear gaps at wall heads
  • Service gaps in risers
  • Cable penetrations
  • Pipe penetrations
  • Joints between fire-resisting walls and floors
  • Small duct penetrations where the tested detail allows

For managing agents and facilities managers

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.

As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.

Accreditations

Trusted. Accredited. Insured.