Construction Mastic in South Kenton
Looking for construction mastic in South Kenton? It’s simple: send details, get a quote, we seal, guaranteed.
- Sealant knocked or painted over by other trades
- A long mastic snag list close to completion
- Missed perimeter joints on a new elevation
Construction mastic for businesses in South Kenton
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Work for main contractors and building owners
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first, and our applicators hold CSCS cards.
How we handle construction mastic in South Kenton
On a new build, the mastic package is one of the last trades through each area. We work as a mastic subcontractor to main contractors and developers. Site teams most often ask us about sanitary sealant damaged by following trades and existing joints on a refurb that need cutting out and resealing, on window and door perimeters, internal decorators’ caulk and brick and block movement joints. Most enquiries from South Kenton start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Around South Kenton, as across London, much of the work is refurbishing existing buildings as well as building new ones. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building, so tidy, well-planned work matters.
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.
- Where
- South Kenton (HA9, HA0, HA3)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
How the job changes by surface
Window and door perimeters
Gaps around frames have to be within the sealant’s range. Gaps outside the product’s range are raised with the site team.
Bathrooms, en suites and washrooms
In bathrooms and washrooms, an anti-mould sanitary silicone goes around every fitting. Joints are cleaned, sealed and tooled neatly, and any bath is loaded with water first where that’s the agreed method.
When it isn’t the sealant
Part of a good diagnosis is knowing where sealant stops. We will tell you if the real problem is one of these:
- Joint design decisions that belong to the architect or engineer
- Deciding which fire-stopping product a penetration needs
- Joints damaged after sign-off by following trades
Not sure which it is? You can give us a call on 01277 525 020 or email a schedule or drawings and we will tell you honestly before you book.
What we seal
- Floor and skirting junctions
- Window and door perimeters
- Sanitary and kitchen joints
- Cladding and panel joints
- Internal decorators’ caulk
- Brick and block movement joints
Common problems we fix in South Kenton
Most mastic snags on new buildings come from sequencing rather than product. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage, and the joint has to be redone.
Any of the following is a good reason to get the joints checked over:
- Early adhesion failures on new external joints
- Different trades sealing to different standards
- Bath and shower joints scraped during the final clean
- A long mastic snag list close to completion
Hotel extensions and refits, at places such as St Nicholas Hotel, which lies north-west of South Kenton, typically run between busy periods, so the sealing is squeezed into short windows.
What to look for in a quote
- How the joint faces will be prepared and primed
- What site paperwork they can supply
- Will CSCS-carded applicators be on site?
- Their pre-qualification and accreditations
New build and refits around South Kenton
Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in South Kenton. Add booked deliveries and tight storage, and the mastic package needs planning with the site team. South Kenton has plenty of hotels close by, all within 2 miles. When hotels extend or refit, the work is usually squeezed between peak periods, mastic included.
For contractors at a college like London College of Management Studies (1 mile north of South Kenton), perimeters and internal sealant are timed for the holidays. On a healthcare site such as Northwick Park Hospital, 0.7 miles to the north-west of South Kenton, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
South Kenton is about 1 mile north-west of Wembley, in Greater London. We cover commercial sites throughout South Kenton, for single jobs and planned programmes alike. Across Greater London, 764 places are covered, South Kenton among them. London is covered too, around 10 miles from South Kenton.
Business premises anywhere in HA9, HA0 and HA3 are within our area for mastic packages. We cover commercial and managed buildings on Peel Road, Holt Road and Byron Road. Close to South Kenton, our area also takes in Northwick Park (1 mile west), Kenton (1 mile north), North Wembley (1 mile south), Brondesbury Park (1 mile south) and Harrow on the Hill (1 mile west). A short drive away, we cover London (10 miles south-east), City of Westminster (8 miles south-east), Marylebone (8 miles south-east), Kensington (7 miles south-east), St Pancras (9 miles east) and Shoreditch (10 miles east).
Near you in South Kenton
Recent enquiries here include premises near Windermere pub, Preston Park and Wembley High Technology College and the streets around them. There’s a railway station in South Kenton itself: South Kenton station. A little further out are St. Mark's Hospital (0.6 miles north-west) and Kodak Museum (2.2 miles north-west). Open spaces near South Kenton include Castlebar Hill and Masons Field.
From enquiry to sign-off
We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and your contact hears from us before we move to the next area. All of Greater London is in the ULEZ, and kerbside space in South Kenton can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- Drawings, specification and programme come to us.
- Quantities are measured and a fixed price returned.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- After snagging, the work is handed over under our 12-month guarantee.
Getting the site ready
- Let building users know which areas are affected
- Arrange parking or a loading space
- Send your site hours and access windows
Get a fixed quote
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or ring 01277 525 020 or email us if you’d rather talk the job through.
Related advice
Places near South Kenton
What else we do in South Kenton
What happens if it’s left?
Refurbishments sometimes budget for new windows when the frames are sound and only the seal has failed. If the frame is in good order, cutting out and resealing the perimeter can be all it needs, which is a much smaller cost. If the frame is life-expired, we will tell you. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
Why us?
- Health and safety: CHAS accredited
- Fixed quotes based on photographs, drawings or a visit
- A Constructionline member, so easy to vet
- RAL and finish matching where the product range allows
Read what affects the cost or our accreditations.
Questions we’re asked in South Kenton
Can you take on a job at a hospital such as Northwick Park Hospital?
Yes, hospitals are one of the sectors we cover. Each area is agreed with the ward or department and the estates team in advance.
Will you plan work around the academic year at somewhere like Westminster University?
Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Can you clear a mastic snag list before handover?
Yes. We can work through a mastic snag list area by area before handover.
What happens if old sealant might contain asbestos?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.
When is resealing likely to be due?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.
Can you send site paperwork?
Requirements differ from site to site, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.
What do you charge?
That depends on the job: quantities, access, the product and any phasing. Call for a quote.