Fire stopping in Old Chiswick
Fire-rated and intumescent sealing of service penetrations and linear gaps across Old Chiswick, by CSCS-carded applicators. Fully insured and CHAS accredited.
- Hidden openings found during inspections
- Non-fire-rated filler around services
- Seals that don’t match their tested detail
Fire stopping across Old Chiswick
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 Old Chiswick
Most of our fire stopping work happens after the building is up. Each new cable, pipe or data route cut through a fire-resisting wall leaves an opening behind, and they are easy to forget. We close the openings listed on your schedule, using the specified sealant and detail. Site teams most often ask us about fire-stopping items raised at inspection or handover and unsealed penetrations discovered above suspended ceilings, across small duct penetrations where the tested detail allows, service gaps in risers and cable penetrations. Searching for sealant specialists in Old Chiswick? We have been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.
In London, higher-risk residential buildings under the Building Safety Act bring extra scrutiny of fire-stopping records. Our part is installing the specified fire-rated sealant; tell us what records you need and we will confirm with the quote.
Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we are clear about what is covered before work starts.
- Location
- Old Chiswick (W4, SW13, W6)
- Wider area
- Greater London
- Cover
- 12 months on our workmanship
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Diagnose, treat, sign off
Site rules come first: sign-in, induction and whatever permit system the building uses. Once we are cleared to begin, we take the joints in the sequence agreed with you, and each area is checked before we leave it. In Old Chiswick, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.
- We start with your penetration schedule, drawings or specification.
- We plan the sequence of floors, risers and voids with you.
- We compare every service penetration with its tested detail before sealing.
- Foam, ordinary sealant and debris come out so the seal starts clean.
- The specified backing and sealant go in to depth and are finished neatly.
- Anything outside the detail is reported to you rather than sealed.
Preparing the site
- Explain the parking and delivery arrangements
- Share the asbestos register for older buildings
- Let us know about inductions and permits
Get a fixed quote
A handful of photos and a postcode is the fastest way to a quote. Upload them with the quote form, or speak to us on 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.
Related advice
Why act early in Old Chiswick
Open service penetrations matter on ordinary days, not just in a fire: smoke, noise and draughts pass through them every day. The specified fire seal closes the gap for all of these and the building feels the difference. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Why choose Mastic Doctor in Old Chiswick
- Fully insured
- Commercial sealant work since 2005
- Our applicators hold CSCS cards
- Products installed to the manufacturer’s instructions
Questions we are asked in Old Chiswick
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Old Chiswick?
Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
Do you work on fire-rated sealing in hotels in Old Chiswick?
Yes, where fire-rated sealant is the specified product. We match the product to the wall or floor and the services, and say if something other than sealant is needed.
Which sealant will you use?
A specification, where there is one, decides it. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
Can staff carry on working while you are here?
Yes, as long as we plan it. Tell us your site hours and access windows and we’ll plan around them.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.
Will you come and look before quoting?
Many jobs can be quoted from photos, drawings or a joint schedule. Where they aren’t, we arrange a site visit before quoting.
Are you CHAS accredited?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.
Commercial clients in Old Chiswick
If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.
Where services cross fire walls in Old Chiswick
Fire stopping of openings and penetrations in England falls under Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. Every new tenant in a London building tends to bring new cabling, and with it new holes through compartment walls. We install fire-rated sealant where it is specified and work within the building manager’s permit system.
At a university such as Richmond American University London, 1.1 miles north-west of Old Chiswick, labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work. At a healthcare site like Charing Cross Hospital (1.3 miles east of Old Chiswick), new services through compartment walls are a constant, and each needs the specified seal.
Old Chiswick is about 2 miles south of Acton, in Greater London. Across the W4 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Our Greater London coverage takes in 764 places, large and small. We also cover London, around 7 miles from Old Chiswick.
Work on service penetrations is covered throughout W4, SW13 and W6. Streets here include Short Road, Quick Road and Paxton Road. If your building is just outside Old Chiswick, we cover Turnham Green (1 mile west), Chiswick (1 mile north-west), Grove Park (1 mile west), Barnes (1 mile south) and Hammersmith (1 mile north-east). A short drive away, we cover London (7 miles east), City of Westminster (5 miles north-east), Marylebone (5 miles north-east), St Pancras (6 miles north-east), Shoreditch (8 miles east) and Walthamstow (12 miles north-east).
Landmarks near Old Chiswick
Recent enquiries here include premises near George and Devonshire pub, The Swedish School and Polish Library POSK in London. Nearby too are Turnham Green (0.8 miles north-west) and Chiswick School (0.5 miles south-west). For rail, the closest station is Chiswick station, roughly 0.8 miles south-west. Nearby you will also find Kurdish Museum Library and Archive (0.7 miles north-east) and West London Hospital (1.3 miles east). For a walk, there’s Campden Hill and Kew Gardens Lake.
Nearby places to Old Chiswick
Other services in Old Chiswick
What we’re called out for in Old Chiswick
Some seals fail because the wrong product went in: expanding foam or a general-purpose sealant pushed into a gap to tidy it. It may look closed, but it has no tested fire performance in that position and has to be removed.
What tends to prompt an enquiry:
- Expanding foam used as fire stopping
- Penetration schedules that need working through
- Hidden openings found during inspections
- Unsealed openings around new pipes and cables
For a site team at a college like St Mellitus Theological College, which lies east of Old Chiswick, fire-rated sealing is best scheduled after the summer works.
Comparing quotes
- How the existing material will be dealt with
- How they handle RAMS and site documents
- How long is the guarantee, and what does it include?
- How the joint faces will be prepared and primed
After the work
Cleaning and maintenance staff play a part too. Pass these on to them:
- Leave fire sealant to cure fully before covering it
- Foam or ordinary sealant is never a fire-seal repair
- Treat an open penetration as a priority repair
- Have penetrations checked while they can still be seen
Give the sealant its full cure time before ceilings, boxing or decoration go over it. Some fire-rated sealants accept paint and some don’t.
Ask every contractor who works in risers or voids to report openings they create. Small habits like this stop openings building up.
When something else is needed
Sealant solves a lot, but not everything, and we are upfront when that’s the case. It won’t fix:
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Large openings beyond what any sealant detail covers
- Walls or floors that aren’t fire-resisting to begin with
Not sure which it is? You can speak to us on 01277 525 020 or send details through our quote form and we will tell you honestly before you book.
Surfaces we seal
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Pipe penetrations
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
- Service gaps in risers