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

Braintree fire stopping

Fire-rated and intumescent sealing of service penetrations and linear gaps in Braintree. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Fire stopping installed outside its tested range
  • Hidden openings found during inspections
  • Fire-stopping items raised at inspection or handover
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
£5m public liability

Fire stopping in Braintree

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

On site: what to expect

Tell us your site hours and access windows and we’ll plan around them. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. Town-centre jobs in Braintree can mean limited parking and loading, whereas edge-of-town units normally have yard space. Let us know what’s there when you send details.

  1. We ask for the product and detail your designer has specified.
  2. We sort the openings by the detail each one needs.
  3. Old or wrong materials are cut out.
  4. Mineral wool or other backing is fitted where required.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. Completed areas are checked with you, with the records agreed when we quoted.

Getting the site ready

  • Make sure the joints can be reached
  • Tell us your opening times and when work is allowed
  • Point out any areas we must not close

Getting a fixed quote

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.

Get a price

Read more

Fire stopping for commercial buildings in Braintree

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. We match each opening to that detail before any sealant goes in, and we say so if it doesn’t fit. If you have hidden openings found during inspections and seals disturbed by maintenance and left open, we can put it right, on linear gaps at wall heads, small duct penetrations where the tested detail allows and cable penetrations alike. A specialist sealant contractor works differently from a general builder: on jobs in Braintree, preparation and product choice get the time they need.

On larger sites around Braintree, fire-rated sealing typically follows the M&E trades floor by floor. Design and sign-off of fire stopping rest with the designer, fire engineer or building control; we install what has been specified.

Every job we finish is backed by a 12-month workmanship guarantee, in Braintree as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Braintree (CM7, CO9, CM77, CO6)
Region
Essex
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026

Your questions answered

Will you plan work around the academic year at somewhere like Braintree College?

Yes, holiday working periods are the norm on campus jobs. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

What happens to BS 476 references for fire stopping in Braintree?

References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

Is Braintree in your area?

Yes. We cover Braintree, and you can call the office on 01277 525 020 or email the details over to get started.

Do you have public liability insurance?

Yes. Mastic Doctor is fully insured, public liability included.

What will the job cost?

We don’t publish prices, as every site differs. Send photographs or drawings and we’ll price it at a fixed figure.

How long before the joints can be used?

That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we will confirm the curing time on the day.

Do you take on multi-site work?

Yes. A group of buildings can go on one quote, and you deal with one contact throughout.

What we can’t put right

Our job is the joint, not everything around it. On its own, sealant can’t deal with:

  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Reviewing a building’s overall fire safety
  • Plastic pipes whose detail calls for a collar or wrap

Not sure which it is? You can call 01277 525 020 or use the quote form and we’ll tell you honestly.

Surfaces we seal

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

Why it’s worth doing now in Braintree

An open or wrongly sealed service penetration lets fire and smoke reach the next compartment much sooner than the building was designed for. While the openings can be reached, sealing them is normally straightforward. Left until ceilings are closed or a tenant moves in, the same work costs more access and more disruption. A leaking joint in a commercial building in Braintree can damage stock, ceilings and finishes. It’s worth fixing at the first sign.

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 you will have a fixed figure to work with.

Why appoint us

  • One contact handling all your sites
  • Products installed to the manufacturer’s instructions
  • Our applicators hold CSCS cards
  • A fixed quote before work starts

Read what affects the cost or our accreditations and insurance.

Service penetrations in Braintree buildings

There are three care or nursing homes within about 2 miles of Braintree. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal. We install fire-rated sealant to the tested detail where it is specified. Fire stopping of openings and penetrations in England falls under Approved Document B. 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. Our part stays the same: the specified product, installed to its tested detail.

Older community buildings such as Congregational Church that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Where a unit on an estate such as Springwood Industrial Estate, 1.1 miles to the west of Braintree, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail.

Braintree is about 39 miles north-east of London, in Essex. We send applicators to Braintree for service penetrations, handled exactly as we handle every other area. Across Essex, 644 places are covered, including Braintree. Our London page has more on work in that area.

If you need fire stopping in CM7, CO9, CM77 and CO6, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Buildings on Market Street, Little Square and Great Square are within our area for service penetrations. You’ll find Braintree on or near the A12 and A120, so getting applicators and materials to site is simple. We also cover Bocking (1 mile west), Long Green (2 miles south-east), Great Notley (2 miles south-west), Black Notley (2 miles south) and Row Green (2 miles south-west). Nearby towns on our patch include Colchester (14 miles east), Chelmsford (11 miles south), Maldon (12 miles south-east), Witham (6 miles south-east), Camulodunum (13 miles east) and Halstead (5 miles north-east). Braintree ranks among the main centres of Essex, with offices, shops, schools and other public and commercial buildings.

Near you in Braintree

In Braintree, that means premises near Edith Borthwick School, Bocking Blackwater and Angel Inn and the streets around them. For rail, the closest station is Braintree station, about 0.5 miles south-west. Well-known places in the area include Tudor House Museum (Braintree) (less than half a mile north-west) and St Michael's Hospital (0.9 miles west). Open spaces near Braintree include Belcher's and Broadfield Woods.

Map of Braintree © OpenStreetMap contributors

Different surfaces, different methods

Risers and ceiling voids

Voids hide a lot of unsealed openings. We work through the areas on your schedule methodically.

Masonry and concrete

Openings through concrete vary from tidy cores to rough break-outs. Each gap is measured where it is widest against the detail’s limits.

Common problems we fix in Braintree

Physical damage is another reason seals stop doing their job. Maintenance work can knock a seal, cut it back for an extra cable or remove it with an old pipe and the opening isn’t always resealed.

Things that usually lead to an enquiry:

  • Head-of-wall gaps with no fire seal
  • Fire seals cut back for extra cables and never reinstated
  • Unsealed penetrations discovered above suspended ceilings
  • Fire sealant pulled out of the opening

At a college such as Braintree College, 0.6 miles to the north of Braintree, checking penetration seals after summer M&E works is good practice.

Questions to ask before you book

  • Whether their applicators hold CSCS cards
  • How they handle RAMS and site documents
  • What level of public liability insurance do they hold?
  • Will failed sealant be removed rather than covered?

Questions to ask before you appoint anyone

Maintenance after handover

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. Our advice:

  • Make fire stopping part of every scope that crosses a fire-resisting wall
  • Ask the designer to confirm details early on refits
  • Flag new cables with no seal around them
  • Check risers and ceiling voids after each round of works

Keep the product data and installation details with the building’s fire safety information. Anyone resealing later needs to know which product and detail were used.

A simple record of seal locations and products helps. It tells the next contractor exactly what to reinstate.

Accreditations

Trusted. Accredited. Insured.