Nunhead fire stopping
Fire-rated and intumescent sealing of service penetrations and linear gaps in Nunhead and across Greater London. CHAS accredited and fully insured, with a 12-month guarantee.
- Snag lists that include open service penetrations
- Old intumescent sealant that has split away
- Unsealed openings around new pipes and cables
Fire stopping in Nunhead
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our fire stopping in Nunhead
Opened ceilings and riser doors often reveal service openings nobody sealed. If a specification already covers those walls and floors, we can reseal to it, matching the product and detail it names. With no specification in place, the first step sits with your designer or fire engineer, not with us. We work on joints between fire-resisting walls and floors, linear gaps at wall heads and small duct penetrations where the tested detail allows, and the failures we’re asked to look at most are open linear gaps along the top of fire-resisting walls and old intumescent sealant that has split away. Most enquiries from Nunhead start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.
In a London area such as Nunhead, 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.
Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If our installation lets you down in that time, we return and fix it.
- Location
- Nunhead (SE15, SE4, SE14)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Quotes
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
FAQs: Nunhead
Can you seal penetrations in a hotel in Nunhead after a refit?
Yes, to the specification and the product’s tested detail. We match the product to the wall or floor and the services, and say if something other than sealant is needed.
Is hospital work, at somewhere like University Hospital Lewisham, something you do?
Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.
Which sealant will you use?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
What if there’s asbestos in the old mastic?
The duty to manage asbestos sits with the building’s dutyholder, so we’ll ask for the register before work on an older building. If anything suspect turns up, we stop until it’s tested.
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.
Can you follow the specification on our project?
Yes. Include it with the drawings when you ask for a quote, and we will price the work to it, flagging anything that needs clarifying.
How long before the joints can be used?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Penetration seals near Nunhead
Two care or nursing homes sit less than 2 miles from Nunhead. 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. In London buildings, frequent fit-outs and M&E changes are a common reason fire stopping gets breached. Penetrations are sealed with the specified product, to its tested detail, under the building’s own permit rules.
Residences at universities like King's College London (to the west of Nunhead) have compartment walls that must be resealed whenever services change. Large healthcare estates like University Hospital Lewisham (1.5 miles east of Nunhead) change their services often, so penetration seals are worth checking after M&E work.
Nunhead is about 1 mile south-west of New Cross, in Greater London. If you are looking for fire stopping in Nunhead, we can help. Nunhead is one of 764 places in Greater London on our list for service penetrations.
Business premises anywhere in SE15, SE4 and SE14 are within our area. Among the streets we cover are Rye Road, Nash Road and Kitto Road, and sites on any of them can send details for a fixed quote. If your building is just outside Nunhead, we cover Telegraph Hill (1 mile north-east), Honor Oak (1 mile south), Peckham (1 mile north-west), New Cross (1 mile north-east) and Brockley (1 mile south-east). A short drive away, we cover London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles west), St Pancras (5 miles north-west) and Shoreditch (5 miles north).
Landmarks near Nunhead
We work on buildings around The Ivy House, Peckham Rye and Allenby Tutorial Trust and the streets around them. Nunhead has its own railway station: Nunhead station. Nearby you’ll also find Greenwich Castle (2.4 miles north-east) and Lewisham Shopping Centre (1.7 miles east). For a walk, there’s Knight's Hill and One Tree Hill.
Owners, agents and contractors
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end.
Signs you need fire stopping in Nunhead
Most open service penetrations are left by later work. New cabling, rerouted pipework or a data route drilled through a riser leaves an opening that nobody returns to. Across several fit-outs, the openings add up.
Look out for the following:
- Fire stopping installed outside its tested range
- Non-fire-rated filler around services
- Unsealed penetrations discovered above suspended ceilings
- Fire-stopping items raised at inspection or handover
For a site team at a college like Christ the King: Aquinas Sixth Form College, 0.6 miles north-east of Nunhead, fire-rated sealing is best scheduled after the summer works.
Questions to ask before you book
- What level of public liability insurance do they hold?
- Whether primer will be used where the manufacturer specifies it
- Who will actually carry out the work
- Whether old or failed sealant will be cut out, not overlaid
How the job changes by surface
Plastic pipes
Waste and drainage pipes through floors are a frequent case. The detail decides whether sealant alone is enough, and we will never swap a specified collar for sealant.
Small ducts
Ducts are only sealed with sealant where the detail allows it. Dampers and ductwork systems themselves are outside our work.
On site: what to expect
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 are on site, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- We read the specification, drawings or penetration schedule you send and ask about anything unclear.
- 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.
- We fit the backing the detail asks for, to the stated depth.
- 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.
Preparing the site
- Move anything stored against the joints
- Warn occupants and staff about the work
- Have the specification and drawings to hand
Get a fixed quote
To get a fixed quote, call 01277 525 020 or email us, telling us the site location and the nature of the job. You can also send details through our quote form.
Read more
What sets the cost
A fixed quote reflects the actual work. It takes account of:
- Access and working height
- Location, for remote and island sites
- The total length or number of joints
- Site requirements such as inductions and permits
The price depends on the quantity of joints, how much old material needs removing and how the joints are reached. Call for a quote once you have the details.
Details that help us quote
A good diagnosis starts with the right details. Let us know:
- Anything awkward about access or site hours
- The product your specification calls for
- Your programme or deadline
- Photos of the joints, close up and from further back
Pricing a project or setting a maintenance budget? We will quote against your scope and drawings that you can work with. If you have questions first, give us a call on 01277 525 020 or send details through our quote form.
Places near Nunhead
Other services in Nunhead
Looking after the joints
A few simple habits keep the new joints working:
- Have penetrations checked while they can still be seen
- Leave fire sealant to cure fully before covering it
- Keep general-purpose fillers away from compartment walls
- Settle who seals which penetrations at the start of a project
After every round of M&E works, check that the openings created have been sealed. Building it into each contractor’s sign-off keeps the walls intact.
Specify fire stopping early on refits, not as an afterthought. Details can then be picked to suit the actual pipes, cables and ducts, and installation follows the programme.