Chiswick construction mastic
Commercial sealant work in Chiswick for contractors, FMs and building owners: mastic packages for new-build and refurbishment projects, with a fixed quote first.
- Different trades sealing to different standards
- New external sealant already peeling away
- Sealant knocked or painted over by other trades
Construction mastic across Chiswick
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our construction mastic in Chiswick
On refurbishments, the mastic package typically includes cutting out old sealant as well as sealing new work. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone. New and existing joints then get the same preparation. If you have perimeter gaps outside the sealant’s range and early adhesion failures on new external joints, we can help. Whether you call it commercial sealant work, mastic application or joint sealing, in Chiswick it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Construction in a London area such as Chiswick means working on constrained sites: small compounds, delivery slots and shared hoists and scaffold. Mastic is typically one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.
We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.
- Where
- Chiswick (W4, SW14)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
What happens if it’s left?
A cheaper sealant can look like an easy saving on a large package. A failed joint in the defects period costs far more than the product difference. We price the specified product and will tell you plainly where an alternative would or wouldn’t work. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
No two sites price the same: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
Why appoint us
- Colours chosen to suit frames, cladding or finishes where possible
- CHAS accredited contractor
- Sealing commercial buildings since 2005
- Clear, fixed quotes
Also in Chiswick
When something else is needed
Some faults sit outside our scope, and we say so rather than covering them up:
- Frames fitted out of tolerance
- Approving fire stopping as compliant
- Damage to finishes by other trades after we’ve sealed
If in doubt, give us a call on 01277 525 020 or email a schedule or drawings and we’ll say what we think.
Surfaces we seal
- Brick and block movement joints
- Window and door perimeters
- Sanitary and kitchen joints
- Cladding and panel joints
- Internal decorators’ caulk
- Floor and skirting junctions
Different surfaces, different methods
External facade and movement joints
External movement joints often need primer, depending on the substrate. Primer goes on where the sealant maker calls for it and work only when conditions suit.
Window and door perimeters
Perimeter joints between frames and the structure are the weather line on any new building. They’re sealed with a low-modulus neutral-cure silicone or another product named in the specification and set the depth with backing where needed.
Mastic packages on Chiswick sites
Site traffic in Chiswick falls within London’s ULEZ, like everywhere else in Greater London. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for. There are plenty of hotels within about 2 miles of Chiswick. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
Projects at colleges like Ealing and West London College, 2.6 miles to the north-west of Chiswick, tend to run to term dates, so the mastic is planned tightly. Hospital estates such as Charing Cross Hospital (1.6 miles east of Chiswick) tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.
Chiswick is about 1 mile south of Acton, in Greater London. Looking for construction mastic in Chiswick? We can help. 764 places across Greater London fall within our area, including Chiswick. Sites around London have their own page, roughly 7 miles from Chiswick.
Anyone looking for construction mastic in W4 and SW14 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are Pumping Station Road, Dale Street and Devonshire Road. Sites close to Chiswick are covered too, including Turnham Green (1 mile south), Old Chiswick (1 mile south-east), Grove Park (1 mile south-west), Gunnersbury (1 mile west) and Strand-on-the-Green (1 mile west). A short drive away, we cover London (7 miles east), City of Westminster (5 miles east), Marylebone (5 miles east), St Pancras (6 miles north-east), Shoreditch (8 miles east) and Walthamstow (12 miles north-east).
Landmarks near Chiswick
We work on buildings around Polish Library POSK in London, Mawson Arms and Chiswick School. Other local landmarks include Turnham Green (0.5 miles west) and The Swedish School (0.6 miles south-east). For rail, the closest station is Chiswick station, about 0.8 miles south-west of the centre. Nearby you’ll also find West London Hospital (1.5 miles east) and Kurdish Museum Library and Archive (0.8 miles east). Not far away are Campden Hill and Duke's Hollow.
How a job runs
Diagnose, treat, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. For a job in Chiswick, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.
- First we look at the scope on site or from drawings.
- You receive a fixed quote covering scope, products and sequence.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- Sealing follows the programme as areas are released.
- Problems we find, such as oversized gaps, are raised right away.
- The package is closed out, snags cleared and backed by our 12-month guarantee.
Getting the site ready
- Send any specification or drawings in advance
- Flag any permit to work we will need
- Point out parking and an unloading spot
Get a fixed quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, ring 01277 525 020 or email the details over.
Read more
Common questions from Chiswick clients
Would you work within a site like Charing Cross Hospital?
Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Share the building’s contractor rules and we will work to them.
How do I request a quote?
There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.
Can one quote cover more than one building?
Yes. Several buildings can share a single quote, and you deal with one contact throughout.
Will you stick to the specified products?
Specification first, then the maker’s instructions. Primers, backing and joint depth follow what the manufacturer sets out.
How long does a typical visit take?
It depends on the scope, though a typical visit typically takes anything from a day of snagging to several weeks of plot-by-plot sealing on a phased scheme. For bigger or phased jobs, we will set out a timescale with the quote.
When can you be on site?
The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.
Aftercare for building managers
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:
- Note which sealant went where at handover
- Release areas for mastic once other trades have finished in them
- Check frame gaps are within the sealant’s range before sealing
- Plan external elevations with the weather in mind
The package carries our 12-month guarantee for workmanship. The guarantee covers how we sealed, not later damage by other trades, so protecting sealed areas matters.
Oversized gaps are a problem better caught early. Filling a wide gap with sealant alone sets up a failure. We raise them during our first walk of the area.
Do you need construction mastic in Chiswick?
On construction sites, joints usually fail early because of when they were sealed, not what was used. If sealant goes in before the last trades are through, it gets knocked, painted over or contaminated.
Site and facilities staff are often the first to spot these:
- Missed perimeter joints on a new elevation
- External joints sealed in damp or cold conditions that are now failing
- Snag items on joints that need redoing before handover
- Oversized or tapered gaps around new frames
Units on estates such as Kew Retail Park, 1.3 miles to the south-west of Chiswick, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
What your quote should include
- Will RAMS and insurance details be available?
- Who will actually carry out the work
- Do they follow the manufacturer’s priming guidance?
- Their plan for phasing and protecting the area