Fire-rated sealing and fire stopping in Coldharbour, Greater London
Looking for fire stopping in Coldharbour? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Hidden openings found during inspections
- Head-of-wall gaps with no fire seal
- Damaged fire seals in risers and voids
Fire stopping for Coldharbour sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
When something else is needed
Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. It won’t fix:
- Plastic pipes whose detail calls for a collar or wrap
- Approving the work on behalf of building control
- Construction that lacks the fire resistance the seal relies on
Not sure which it is? You can speak to us on 01277 525 020 or email drawings and photos and we will tell you honestly.
Where we work in Coldharbour
- Service gaps in risers
- Small duct penetrations where the tested detail allows
- Linear gaps at wall heads
- Cable penetrations
- Pipe penetrations
- Joints between fire-resisting walls and floors
How we handle fire stopping in Coldharbour
Most of our fire stopping work happens after the building is up. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls, often unnoticed. Those on your schedule are closed with the specified product. If you’re dealing with penetration schedules that need working through and open linear gaps along the top of fire-resisting walls, we can help. For commercial sealant work in Coldharbour, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.
Fit-outs and M&E works in London buildings often leave service penetrations open behind ceilings and in risers. Fire-rated sealant goes in where it’s the specified item; where a collar, wrap or batt is called for instead, we flag it.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and the quote explains what it covers.
- Place
- Coldharbour (E14, SE10, E22)
- Region
- Greater London
- Cover
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
How the quote is worked out
Each job is priced on its own details. The things that drive the figure:
- How much existing material needs removing
- How accessible the joints are
- Location, for remote and island sites
- The site’s rules and procedures
Pricing service penetrations depends on how many there are, their condition and the access, plus any specification you are working to. Call for a quote.
What we need to price the job
For an accurate fixed quote, we need a clear picture of the site. Useful things to include:
- Anything awkward about access or site hours
- Whether the building will be occupied during the work
- Approximate linear metres or a joint schedule
- Your programme or deadline
Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to ring 01277 525 020 or email a schedule or drawings.
Work for main contractors and building owners
Building owners and managing agents use us on everything from one building to a spread of sites. Several sites can go on one quote, which keeps the paperwork simple.
Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first, with CSCS-carded applicators on site.
From enquiry to sign-off
We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. Most London premises stay occupied while we are on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
- Mineral wool or other backing goes in wherever the detail asks.
- We apply the specified sealant to the depth and around the services as the detail shows.
- If an opening needs something other than sealant, we tell you instead of improvising.
Before we start on site
- Warn occupants and staff about the work
- Move anything stored against the joints
- Confirm the product named in the specification
Request a quote
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.
Related advice
When to call us in Coldharbour
Plenty of openings were simply never closed, often hidden above suspended ceilings or behind boxing. Inspections, refurbishments and ceiling access usually bring them to light.
Clients normally get in touch after noticing something like this:
- Openings found when ceilings come down for a refit
- Service penetrations left open after M&E works
- Improvised or mixed-product fire seals
- Old intumescent sealant that has split away
At a university such as University of Sunderland in London, less than half a mile to the south-west of Coldharbour, labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work.
What to look for in a quote
- Proof of insurance
- How the joint faces will be prepared and primed
- Can the work be phased to keep areas open?
- The named product and why it was chosen
What happens if it’s left?
Inspections and handover checks often pick up fire stopping. Late discoveries can delay handover while openings are reopened and resealed which is why earlier is better. Getting scaffold, permits or access booked in Coldharbour takes effort, so it makes sense to deal with every failing joint while access is in place.
The specified product makes a difference, and so does the preparation, from cutting out to priming and backing rod. Access, phasing and site rules also count.
Why appoint us
- Products installed to the manufacturer’s instructions
- 12-month guarantee on workmanship
- Commercial sealant work since 2005
- Constructionline member for supplier checks
Read what affects the cost and how we’re accredited.
Service penetrations in Coldharbour buildings
There are a good number of hotels within about 2 miles of Coldharbour. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. With tenants changing and fit-outs following, London buildings see service routes altered again and again. Penetrations are sealed with the specified product, to its tested detail, under the building’s own permit rules.
Offices at parks like Poplar Business Park (to the north of Coldharbour) are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail. Hospital estates such as The London Independent Hospital (to the north-west of Coldharbour) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.
Coldharbour is about 2 miles north of Greenwich, in Greater London. Across the E14 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Coldharbour is one of 764 places we cover in Greater London.
We take on service penetrations across the E14, SE10 and E22 postcode area, whatever the building. Streets here include Canada Square, Simpson's Road and Amsterdam Road. With the A1206 and A1261 nearby, Coldharbour is easy to get to with materials and equipment. Close to Coldharbour, our area also takes in Blackwall (1 mile north-east), London Docklands (1 mile west), Poplar (1 mile north-west), Canary Wharf (1 mile west) and Heron Quays (1 mile west). Further afield, our area takes in London (4 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles west) and Shoreditch (3 miles north-west).
What’s near Coldharbour
Around Coldharbour, our work takes us to commercial buildings near Canary Wharf College 3, Mudchute Park and Farm and Tower Hamlets College. Coldharbour’s nearest station is Canary Wharf station, about 0.5 miles north-west. Well-known places in the area include Old Royal Naval College (1.3 miles south) and Poplar Hospital (0.6 miles north). For a walk, there’s Tower Hill and Lavender Pond.
Places near Coldharbour
More services for Coldharbour
Common questions from Coldharbour clients
Do you work on fire-rated sealing in hotels in Coldharbour?
Yes, where fire-rated sealant is the specified product. It goes in to the manufacturer’s tested detail for the wall or floor and the services passing through, and we’ll tell you if the detail calls for a collar, wrap or batt instead.
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Coldharbour?
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. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
What do you charge?
That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we will price it properly.
What’s the quickest route to a quote?
You can use the quote form on this site; alternatively, speak to us on 01277 525 020 or send details through our quote form. Photos, drawings or a joint schedule help us quote quickly.
When can you be on site?
Give us your site hours and any access windows in your enquiry, and we will schedule the work to suit. You can reach the office between 8am and 5pm, Monday to Friday.
What happens if old sealant might contain asbestos?
The duty to manage asbestos sits with the building’s dutyholder, so for older buildings we ask for the asbestos register first. If anything suspect turns up, we stop until it’s tested.
Are you CHAS accredited and on Constructionline?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.