Fire-rated sealing and fire stopping in Coldharbour, Greater London
Fire stopping in Coldharbour, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Head-of-wall gaps with no fire seal
- Openings found when ceilings come down for a refit
- Unsealed openings around new pipes and cables
Need fire stopping in Coldharbour?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Leave it or put it right?
Sealing behind the M&E trades area by area beats a sweep at the end. Openings are visible, access is open and nothing has to be taken down and each detail can be checked as we go. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.
Why clients in Coldharbour choose us
- 12 months’ guarantee on every job
- Products installed to the manufacturer’s instructions
- Failed material removed, not covered up
- Constructionline member for supplier checks
Take a look at what affects the cost or our accreditations and insurance.
Fire stopping in Coldharbour
A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls. We close the openings listed on your schedule, using the specified sealant and detail. Site teams most often ask us about openings found when ceilings come down for a refit and snag lists that include open service penetrations, across service gaps in risers, linear gaps at wall heads and cable penetrations. Looking for mastic applicators who cover Coldharbour? We’ve been sealing commercial buildings since 2005, with CSCS-carded applicators.
Taller residential buildings in London may fall under the Building Safety Act’s higher-risk regime, where fire-stopping records get close attention. We install what the designer or fire engineer has specified, and if you need records of the work, tell us and we will confirm with the quote.
Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Where
- Coldharbour (SE9, BR7)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Compartments and services around Coldharbour
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. We install whatever has been specified, to the product’s tested detail. London’s office and residential buildings are refitted constantly, and each round of cabling or pipework can leave open penetrations. We seal to the specification and the product’s tested detail, working within the building’s permits.
On a hospital site such as Eltham Community Hospital, 1.2 miles north of Coldharbour, fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits. At a college such as Hadlow College, 1.2 miles to the north-west of Coldharbour, checking penetration seals after summer M&E works is good practice.
Coldharbour is about 4 miles north-west of Orpington, in Greater London. Any commercial site in Coldharbour is covered, for single jobs and planned programmes alike. 764 places across Greater London fall within our area, including Coldharbour. We also cover London, some 8 miles away.
Business premises anywhere in SE9 and BR7 are within our area. Streets here include Green Lane, Horley Road and Dorset Road. We also cover Mottingham (1 mile west), Chinbrook (1 mile west), New Eltham (1 mile north-east), Eltham (1 mile north) and Middle Park (1 mile north-west). Bigger towns within reach include London (8 miles north-west), City of Westminster (11 miles north-west), Marylebone (10 miles north-west), Kensington (12 miles north-west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Around Coldharbour
We work on buildings around Elmstead Wood and St Thomas More Catholic Comprehensive School and the streets around them. For rail, the closest station is Mottingham station, about 0.6 miles north of the centre. Nearby you’ll also find The Glades (2.4 miles south-west) and Metropolitan Police Museum (2.2 miles east). The countryside around Coldharbour includes The Tarn and Summer Hill.
Diagnose, treat, sign off
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. All of Greater London is in the ULEZ, and kerbside space in Coldharbour can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- The specification and schedule come first, so we know which details apply.
- Access, permits and the order of areas are agreed with the site team.
- Each opening is checked for wall or floor type, service, gap and depth.
- Foam, ordinary sealant and debris come out.
- The specified backing and sealant go in to depth and are finished neatly.
- Anything outside the detail is reported to you rather than sealed.
What we need from you
- Share your working hours and any access restrictions
- Send any specification or drawings in advance
- Share the asbestos register for older buildings
Get a fixed quote
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 speak to us on 01277 525 020 or send photos by email.
Advice
Common questions from Coldharbour clients
Can you take on a job at a hospital such as Eltham Community Hospital?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Can you work around term dates at a campus such as University of Greenwich - Avery Hill?
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.
Can you tell us what fire stopping our building needs?
No. Deciding what is needed sits with the designer, fire engineer and building control. Our role is installing what they specify, to the product’s tested detail.
Can one quote cover more than one building?
Yes. Several buildings can share a single quote, with one point of contact.
Will you just go over the old sealant?
No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
What does an EI 60 rating mean?
BS EN 1366-3 covers penetration seals and BS EN 1366-4 covers linear joints. Results are classified under BS EN 13501-2 as E for integrity and I for insulation, with a time such as EI 60 or EI 120. That rating only holds when the product is installed to its tested detail.
Is the BS 476 change in 2029 relevant to fire stopping?
It mainly affects England, where Approved Document B is dropping its BS 476 references from 2 September 2029. Products are then judged on BS EN 13501-2 classifications, though transitional rules apply. In Scotland, the Technical Handbook sets its own guidance, including clause 2.1.14 on service penetrations.
What sealant work can’t fix
Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. These need a different solution:
- Large openings beyond what any sealant detail covers
- Walls or floors that aren’t fire-resisting to begin with
- Fire risk assessments, a job for a competent assessor
If you are not sure, just call the office on 01277 525 020 or email the details over and we will give you a straight answer before you book.
Where we work in Coldharbour
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows
- Joints between fire-resisting walls and floors
- Cable penetrations
- Pipe penetrations
- Service gaps in risers
What we’re called out for in Coldharbour
A common fault is a product that was never fire-rated in the first place: expanding foam or a general-purpose sealant pushed into a gap to tidy it. The opening looks sealed but has no fire test evidence behind it, so it has to come out.
Common reasons buildings call us in:
- Unsealed joints where partitions meet the slab
- Old intumescent sealant that has split away
- Unsealed openings around new pipes and cables
- Unsealed penetrations discovered above suspended ceilings
For a building at a site such as Green Lane Business Park, which lies north-east of Coldharbour, a check of penetration seals after each fit-out is good practice.
What to look for in a quote
- How long is the guarantee, and what does it include?
- Do they follow the manufacturer’s priming guidance?
- Will failed sealant be removed rather than covered?
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Nearby places to Coldharbour
Other services in Coldharbour
How the job changes by surface
Risers and ceiling voids
Risers and ceiling voids hold most of a building’s service penetrations. Access is often tight, so we agree it with you in advance.
Metal pipes
Sealant details often cover copper and steel pipework. The tested detail sets the pipe size range, gap, depth and whether insulation can stay on.
Should maintenance staff do it?
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.