Greater London · England
Fire-rated sealant in Greenhill, Greater London
Fire rated sealant in Greenhill from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Unsealed gaps where pipes and cables go through a wall
- Linear gaps at the head of walls
- Joints picked up in a fire-stopping survey
Fire rated sealant in Greenhill, done properly
Intumescent sealant looks much like any other sealant until it gets hot; in a fire it expands into the joint. The right product depends on the gap size, the substrate and what passes through, so we follow the tested detail for each one. We work on pipe & cable gaps, service penetrations and linear gaps, and people most often call us about gaps where walls meet ceilings or slabs and door frames with gaps between frame and wall.
Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. For a building in Greenhill, we agree timings and access before anything starts.
All our work is covered by our 12-month guarantee, wherever you are in Greater London.
- Where
- Greenhill (NW3, NW6)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Flats and HMOs
Converted houses often have gaps around old and new services. We seal the ones on your specification with a tested product and the locations noted.
Linear gaps
A linear joint may need to allow for movement as well as fire. The product and depth are chosen to suit both, following the tested detail.
What happens on the day
The work is kept neat and contained to the joints we’re treating. The job usually takes from a few hours to a few days, depending on the number of gaps and the access, and we explain the cure time before we leave. In Greenhill, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- Before starting, we go through the specification or action list with you.
- Each gap is measured and its substrate and service noted.
- Unsuitable material such as ordinary foam or silicone is cut out and the faces cleaned.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products for your files.
Preparing for the visit
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
Ask for a quote
For fire rated sealant in Greenhill, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Signs you need fire rated sealant in Greenhill
Door frames are a common weak spot. The architrave hides the gap between frame and wall, so it’s easy to leave unsealed when doors are changed.
Signs it’s time to call us include:
- Gaps filled with a product that is not fire-rated
- Linear gaps at the head of walls
- Seals cut through by electricians, plumbers or data installers
- Open gaps behind door architraves
As a London address, Greenhill can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Before booking anyone
- Are they insured?
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- How the colour is chosen
How we quote for fire rated sealant
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
- Mould in or behind the old joints
- How many areas need sealing
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
What we need to know
You don’t need to know the technical terms. It helps if you can tell us:
- Whether it has been sealed before
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- How many joints, rooms or windows are involved
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Fire rated sealant around Greenhill
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. There are hotels and other places to stay in and around Greenhill. Hotel work can be planned room by room, with out-of-hours working where needed.
For landlords with property near Hampstead Heath station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. Community buildings like Rosslyn Hill Unitarian Chapel are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building.
Greenhill is about 1 mile north-east of Hampstead, in Greater London. Homes, rented property, offices and hotels in Greenhill is covered for fire rated sealant. Every job comes with our one-year guarantee. Across Greater London, we cover 764 places, and Greenhill is one of them.
Here we cover the NW3 and NW6 postcode area for fire rated sealant. Streets in the area include Back Lane, Well Road and Ornan Road. Other places close to Greenhill include Hampstead (1 mile south-west), Vale of Health (1 mile north), West Hampstead (1 mile west), Fortune Green (1 mile west) and Haverstock (1 mile south-east). Larger places within reach include London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (3 miles south-east) and Shoreditch (5 miles south-east).
Landmarks near Greenhill
Locally, jobs take us to homes and businesses close to Cecil Sharp House, Fitzjohn's Primary School and King William IV Public House, among other places. You’ll also find South Hampstead High School (0.6 miles south) and Hampstead Heath (0.7 miles north-east). Greenhill has its own railway station: Hampstead Heath station. Other landmarks nearby include New End Hospital (under half a mile north-west) and Montfichet's Tower (4.3 miles south-east). Not far away are Belsize Wood and Parliament Hill.
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Allow for resealing whenever new services are run
- Flag any open gap you spot round a pipe or cable
- Do not paint over fire sealant until it has cured
- Make resealing part of every contractor’s brief
Let contractors know where fire stopping has been done, and make sure anything they disturb is resealed with a suitable product. Later work is a common cause of damaged fire stopping.
A flagged gap shouldn’t wait for the next assessment. Get it sealed and recorded.
Common questions in Greenhill
Is parking a problem for a job in Greenhill?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I let a flat near Hampstead Heath station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
Can I use normal mastic around a pipe through a fire wall?
No. A gap that needs fire stopping needs a tested fire-rated product fitted to the maker’s details.
Is the work guaranteed?
Yes, always. Each job is guaranteed for twelve months.
How long does the job take?
Typically it takes a few hours for a handful of gaps, and longer for a whole building. Bigger jobs take longer, and we’ll say how long yours will take.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Large holes that need a different fire-stopping system
- Certifying a building or signing off its fire safety
- Doors that aren’t fire doors in the first place
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Pipe & cable gaps
- Linear gaps
- Plasterboard & masonry
- Flats & HMOs
- Door frames
- Service penetrations
What happens if it’s left?
Waiting for the next refit can leave a gap open for years. On its own, sealing it now is a small job and needn’t wait for anything else. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
What you get with us
- Old sealant always removed completely
- Trusted Arbo and Everbuild sealants
- Over 20 years’ experience
- Homes, businesses and hotels
Read our cost guide and our reviews.