Greater London · England
Harmondsworth Fire Rated Sealant
Fire-stopping gaps in Harmondsworth need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Open gaps behind door architraves
- Sealant items on a fire risk assessment action list
- Open joints along the top of partitions
Fire rated sealant in Harmondsworth, done properly
Fire stopping only performs as intended if it’s done to the detail: the right depth, the right backing and the right product for the substrate. That detail is what we take care over, gap by gap. If you have damaged fire sealant left by other trades and door frames with gaps between frame and wall, we can help, on service penetrations, linear gaps and door frames alike.
In London’s blocks of flats, service risers and common parts have pipes and cables passing through walls and floors. For managing agents and building owners in Harmondsworth, that can mean fire-rated sealant around service openings as well as resealing in shared washrooms and kitchens.
All of our work is guaranteed for twelve months, in Harmondsworth and everywhere else we cover.
- Place
- Harmondsworth (UB7, TW6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Harmondsworth
Gaps also open up as buildings move: a seal that cracks or pulls away leaves a path for smoke. Knocks, maintenance and building work damage it further.
People generally contact us after spotting one of these:
- Gaps filled with a product that isn’t fire-rated
- Gaps where walls meet ceilings or slabs
- Holes left by a change of layout
- Sealant items on a fire risk assessment action list
Managing a site like Harmondsworth Primary School? Then service openings in fire-resisting walls need checking after any refurbishment.
Comparing quotes
- How long to leave it before use
- What happens if the job turns out different
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
Nearby places to Harmondsworth
Other services in Harmondsworth
Harmondsworth questions
I let a flat near Heathrow Terminal 5 Rail station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Do you take on hotel work around Harmondsworth?
Yes, we work for hotels as well as homes and businesses. Rooms can be done a few at a time, so the building stays open.
Do you seal gaps around fire door frames?
Yes. We seal the gap between the frame and the wall with a suitable fire-rated product, to the product’s details. The door, its seals and closer are for a door specialist.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Will you assess my building’s fire safety?
No. We follow the requirements from your assessor, designer or building control, and apply each product to its tested details.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
What does fire rated sealant cost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Landlords, agents and businesses in Harmondsworth
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
We also work for property managers and facilities teams in Harmondsworth and across Greater London. Several sites can be quoted together.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Leave it or put it right?
An unsealed gap lets smoke and fire get round a wall that was built to hold them back. A proper seal lets the wall do its job again, and the work involved is often modest. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Harmondsworth, the repair is bigger than a sealant job.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What you get with us
- We never seal over old sealant
- Approved under the ARBOMaster scheme
- Tidy, careful work
- Quality sealants from Arbo and Everbuild
Read how sealant jobs are priced or our reviews.
Looking after it afterwards
After the cure time, these simple habits help:
- Store the list of sealed gaps with your building paperwork
- Don’t paint over fire sealant until it has cured
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Plan fire stopping into any work that goes through walls or floors
Let contractors know where fire stopping has been done, and make sure anything they disturb is resealed with a suitable product. A lot of damaged fire stopping comes from later work.
A flagged gap shouldn’t wait for the next assessment. Get it sealed and recorded.
Commercial buildings in Harmondsworth
Commercial buildings in London often have strict access rules and limited loading, and out-of-hours working is possible to arrange. In England, the Regulatory Reform (Fire Safety) Order 2005 requires a fire risk assessment for workplaces and for the common parts of blocks of flats, which is often where open fire-stopping gaps are first noticed. We work to the specification you are given, installing the product to its tested details.
Harmondsworth is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For buildings such as Church of St Mary, gaps around pipes and cables are worth checking after any building work there.
Harmondsworth is about 1 mile south-west of West Drayton, in Greater London. From the centre of Harmondsworth to the outskirts, we cover fire rated sealant for every kind of property. Across Greater London, we cover 764 places, Harmondsworth among them. For nearby work, see our London page (17 miles or so).
Every address in UB7 and TW6 is within our area for fire rated sealant, from the main roads to the quietest streets. Whether your property is on Moor Lane, Hatch Lane and High Street or anywhere close by, we can help. If you are just outside Harmondsworth, we cover Longford (1 mile south-west), Sipson (1 mile north-east), Heathrow (2 miles south-east), Harlington (2 miles east) and Stanwell (2 miles south). Further out, we also cover City of Westminster (14 miles east), Marylebone (14 miles east), Kensington (12 miles east), Hampstead (14 miles east), Ruislip (7 miles north-east) and Brompton (14 miles east).
What’s near Harmondsworth
In Harmondsworth, that means homes and buildings near Harlington Community School and The Five Bells Inn and the streets around them. The nearest railway station is Heathrow Terminal 5 Rail station, about 1 mile south of the centre. A little further out are British Airways Heritage Collection (3.5 miles north) and Harlington (1.4 miles east). The countryside around Harmondsworth includes Crane Meadows and Staines Reservoirs.
The process
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. It generally takes anything from a few hours to several days, depending on how many gaps there are. For a job in Harmondsworth, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- 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.
- The specified fire-rated sealant goes in over any backing its detail requires.
- Every location is recorded with the product used.
How to prepare
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
How to get a quote
We quote each job on its own. Just call 0345 464 0079 or send us an email with the details, and pictures are welcome.
Read more
What we cannot put right
It helps to know what we can’t do:
- Walls or floors that weren’t built to resist fire
- Openings too large for sealant, which need batts, boards or another system
- Problems with the door itself rather than the gap around the frame
If in doubt, ring 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Linear gaps
- Service penetrations
- Pipe & cable gaps
- Door frames
- Plasterboard & masonry
- Flats & HMOs