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

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

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

  • Seals disturbed by maintenance and left open
  • Old intumescent sealant that has split away
  • Head-of-wall gaps with no fire seal
1
Send details
Tell us about the site, with photos if you have them.
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.
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Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
Constructionline member
£5m public liability

Need fire stopping in Rainham?

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

Maintenance after handover

Problems stay small when the joints are checked regularly. Specifically:

  • Ask the designer to confirm details early on refits
  • Flag new cables with no seal around them
  • Look above ceilings when tiles are lifted for other jobs
  • Put resealing into every M&E and fit-out package

Keep the product data and installation details with the building’s fire safety information. It makes later repairs much easier to match.

Ask every contractor who works in risers or voids to report openings they create. It costs little and catches breaches early.

How we handle fire stopping in Rainham

Every service that crosses a compartment wall or floor leaves an opening, and that opening needs sealing to hold back fire and smoke. Our job is fitting fire-rated and intumescent sealant at those service penetrations, and along linear gaps, where it is the specified product. We work to the product’s tested detail for every seal rather than guesswork. If you have hidden openings found during inspections and fire seals cut back for extra cables and never reinstated, we can help. Whether you call it commercial sealant work, mastic application or joint sealing, in Rainham it comes down to the same thing: the right product in a properly prepared joint.

In a London area such as Rainham, buildings are refitted often, and every new cable, pipe or duct through a fire-resisting wall or floor leaves a gap. Where the specification names fire-rated sealant, it goes in exactly as the manufacturer’s test evidence shows for that wall or floor.

A 12-month guarantee applies to all our work. If an installation problem shows up, call the office on 01277 525 020 or send photos by email and we’ll arrange a return visit.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Rainham (RM13)
Wider area
Greater London
Cover
A 12-month guarantee
Quote
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026

Questions about Rainham

Can you work at a site such as Ferry Lane Industrial Estate, by Rainham?

Yes. Estates, retail parks and business parks around Rainham, Ferry Lane Industrial Estate among them, are all within reach. To start, just give us a call on 01277 525 020 or email the details over with the unit, the joints involved and your access times.

Can you work in a London building with booked loading and goods-lift slots?

Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we will work to them. All of Greater London is inside the ULEZ, and our planning allows for it

Can you fire stop behind the services contractors?

Yes, where there is a specification for those walls and floors. New services after M&E works often breach existing seals and we close them with the specified product.

Do you approve fire stopping for building control?

No. Sign-off belongs to the designer or building control, not the installer. We’ll confirm the products and details used, and you can tell us what other records you need at quote stage.

How soon can the area be used again?

We’ll confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.

What do you charge?

There isn’t a price list, as every site differs. With photos or drawings, we can give you a fixed quote.

Does weather matter for sealant work?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.

Fire stopping in Rainham: the local picture

With tenants changing and fit-outs following, London buildings see service routes altered again and again. We seal to the specification and the product’s tested detail, working within the building’s permits. 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. Our part stays the same: the specified product, installed to its tested detail.

For a site team at a college like New City College, which lies north-west of Rainham, fire-rated sealing is best scheduled after the summer works. For a hotel such as The Manor Hotel & Restaurant, which lies north-east of Rainham, penetration seals are worth checking after any refit or services upgrade.

Rainham is about 4 miles south of Romford, in Greater London. Any commercial site in Rainham is covered, for single jobs and planned programmes alike. Across Greater London, 764 places are covered, including Rainham. We also cover London, around 13 miles from Rainham.

We take on service penetrations across the RM13 postcode area, for business premises of every kind. If your site is on New Road, Ferry Lane and Wantz Lane or close by, we can quote for service penetrations. Just outside Rainham, we also work in South Hornchurch (1 mile north-west), Beam Park (1 mile west), Hornchurch Marshes (1 mile west), Dagenham Green (2 miles west) and Elm Park (2 miles north). A short drive away, we cover London (13 miles west), City of Westminster (15 miles west), Marylebone (15 miles west), St Pancras (13 miles west), Shoreditch (12 miles west) and Walthamstow (11 miles north-west).

Around Rainham

We work on buildings around Harris Academy Rainham, The Chafford School and The Phoenix pub. Rainham has its own railway station: Rainham (Essex) station. A little further out are St George's Hospital (2.3 miles north-east) and Erith Museum (2.6 miles south). For a walk, there’s Ingrebourne Marshes.

Map of Rainham © OpenStreetMap contributors

When something else is needed

Honesty saves time and money. New sealant won’t cure:

  • Large openings beyond what any sealant detail covers
  • Fire risk assessments, a job for a competent assessor
  • Designing or specifying fire stopping, which sits with the designer or fire engineer

Not sure which it is? You can call the office on 01277 525 020 or email us and we’ll tell you honestly before you book.

What we seal

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

Work for main contractors and building owners

As a CHAS accredited contractor and Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Rainham can form part of a wider programme across Greater London.

How a job runs

We bring the products specified for the job, along with primers and backing rod. Any old material is cut back to clean, sound faces, primer goes on where the manufacturer specifies it, and the sealant is tooled off neatly. Most London premises stay occupied while we’re on site, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  1. We read the specification, drawings or penetration schedule you send.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  3. Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
  4. We fit the backing the detail asks for, to the stated depth.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Getting the site ready

  • Flag any permit to work we will need
  • Send any specification or drawings in advance
  • Make sure the joints can be reached

Quotes

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email drawings and photos.

Get a price

Read more

Why it’s worth doing now in Rainham

Open penetrations multiply: every new cable or pipe adds another. A schedule that is dealt with regularly stays manageable and avoids a much larger catch-up later. In a London building, a failed joint rarely affects only one party. Dealing with it early is simpler for everyone.

No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

What you get with us

  • Health and safety: CHAS accredited
  • Constructionline member for supplier checks
  • One contact handling all your sites
  • Work to your specification and the manufacturer’s guidance

Read how commercial sealant jobs are priced and our accreditations.

Do you need fire stopping in Rainham?

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.

Things that normally lead to an enquiry:

  • Service penetrations left open after M&E works
  • Fire seals cut back for extra cables and never reinstated
  • Fire stopping installed outside its tested range
  • Expanding foam used as fire stopping

Wherever services are added at a hospital such as Grays Court Community Hospital (2.2 miles north-west of Rainham) the compartment line has to be made good with the specified product.

Before you book anyone

  • Will RAMS and insurance details be available?
  • Health and safety accreditation such as CHAS
  • Which product they’ll use, and why it suits the joint
  • Whether their applicators hold CSCS cards

Questions to ask before you appoint anyone

Accreditations

Trusted. Accredited. Insured.