Fire-rated sealing and fire stopping in Sydenham, Greater London
Sealant work in Sydenham for main contractors, managing agents and facilities managers: fire-rated and intumescent sealing of service penetrations and linear gaps, with a fixed quote first.
- Hidden openings found during inspections
- Fire seals cut back for extra cables and never reinstated
- Snag lists that include open service penetrations
Fire stopping near Sydenham
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle fire stopping in Sydenham
We are commercial sealant applicators, CHAS accredited and a Constructionline member, with CSCS-carded applicators on site. We hold no third-party fire-stopping installer certificate, and we won’t pretend otherwise. What we offer is careful installation of the specified sealant to its tested detail, with a 12-month guarantee on our workmanship. We work on pipe penetrations, joints between fire-resisting walls and floors and small duct penetrations where the tested detail allows, and the usual reasons a site gets in touch are fire-rated sealant that has cracked or shrunk back and openings left by services added after handover. Whoever orders the work in Sydenham, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
After a fit-out or new cabling in a London building, risers and ceiling voids are where open service gaps tend to be found. Fire-rated sealant goes in where it’s the specified item; where a collar, wrap or batt is called for instead, we flag it.
Whoever the client is, the cover is the same: twelve months on the work we carried out. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Where
- Sydenham (SE26, SE20, SE23)
- Region
- Greater London
- Cover
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
On site: what to expect
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- We read the specification, drawings or penetration schedule you send.
- 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.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Getting the site ready
- Warn occupants and staff about the work
- Share the asbestos register for older buildings
- Make sure the joints can be reached
Getting a fixed quote
Send us photos, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.
Related advice
Places near Sydenham
More services for Sydenham
Fire stopping around Sydenham: points for this area
Approved Document B is the English guidance that covers fire stopping around openings and penetrations. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. What we install is set by the specification, and it goes in to the tested detail. The area within 2 miles of Sydenham holds a number of hotels. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close.
For a site team at a college like Capel Manor College, which lies south-west of Sydenham, fire-rated sealing is best scheduled after the summer works. On estates like Clyde Vale Industrial Estate, which lies north of Sydenham, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal. At a healthcare site like British Home & Hospital for Incurables (2.3 miles west of Sydenham), new services through compartment walls are a constant, and each needs the specified seal.
Sydenham is about 3 miles south-east of East Dulwich, in Greater London. Our applicators travel to Sydenham for work on service penetrations, handled exactly as we handle every other area. Our Greater London coverage takes in 764 places.
Postcode districts covered here: SE26, SE20 and SE23. Buildings on Byne Road, Lucas Road and Cator Road are within our area. Sites close to Sydenham are covered too, including Penge (1 mile south), Crystal Palace (1 mile south-west), Sydenham Hill (1 mile north-west), Perry Vale (1 mile north-east) and Anerley (1 mile south-west). Further afield, our area takes in London (5 miles north), City of Westminster (7 miles north-west), Marylebone (8 miles north-west), Kensington (8 miles north-west), St Pancras (7 miles north) and Shoreditch (7 miles north).
Local landmarks in Sydenham
Locally, jobs take us to sites close to St Bartholomews's Church of England Primary School, Sydenham High School and Mayow Park, among other places. There’s a railway station in Sydenham itself: Sydenham station. A little further out are Greenwich Castle (4.3 miles north-east) and Crystal Palace Museum (1 mile west). Not far away are Dacres Wood and Knight's Hill.
What the job involves on each surface
Risers and ceiling voids
Voids hide a lot of unsealed openings. We work through the areas on your schedule methodically.
Metal pipes
Metal pipes conduct heat, so their details often call for extra measures along the pipe, and the tested detail may ask for insulation beyond the wall. If the detail needs something beyond sealant, we tell you.
What happens if it’s left?
A seal that doesn’t match its tested detail gives false comfort. The fix is to remove it and reinstall to the detail. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
What a job costs comes down to how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a quote when you’re ready.
Why clients in Sydenham choose us
- Constructionline member for supplier checks
- Work carried out by CSCS-carded applicators
- Fully insured, including public liability cover
- One phone line for London, the South East and Scotland
Take a look at what affects the cost or our accreditations.
Common questions from Sydenham clients
Can you work around term dates at a campus such as King's College London?
Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Do you work on fire-rated sealing in hotels in Sydenham?
Yes, where the specification calls for fire-rated sealant. Work is done room by room so the hotel keeps trading; design and sign-off stay with the designer and building control.
Do you seal on top of existing sealant?
No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
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’ll price it properly.
Do you need to see the site first?
Many jobs can be quoted from photos, drawings or a joint schedule. If the job needs a look first, we will arrange a visit.
Will you quote for a small job?
Small jobs are welcome alongside larger packages. Send details for a fixed quote.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
Doing it in-house
A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.
What affects the price in Sydenham
To price the job, we consider:
- Travel to remote or island sites
- Induction, permit and paperwork requirements
- Joint width, depth and condition
- Quantities, in metres or numbers
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.
What we need to price the job
Good information means a firmer quote. Helpful details to send:
- What the building is and how it’s used
- Asbestos survey details if the building is older
- Rough lengths or quantities, or drawings if you have them
- Photos of the joints, close up and from further back
For a fixed quote, call the office on 01277 525 020 or email a schedule or drawings with the site address and an outline of the work. You can also send details through our quote form.
When it isn’t the sealant
Before quoting, we check that sealant is the right answer. It won’t put right:
- Writing the fire-stopping specification
- Fire doors, dampers or other fire safety equipment
- Gaps in walls that were never built as compartment walls
If in doubt, call the office on 01277 525 020 or send photos by email and we will say what we think before you book.
Where we work in Sydenham
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
- Pipe penetrations
- Cable penetrations