Mastic sealant contractors in West Kensington
Planning work on a mastic joint in West Kensington? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Draughts at frames across a block
- Brittle perimeter mastic across a building
- Complaints coming in block by block
Mastic sealing in West Kensington
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
What happens if it’s left?
Adding sealant to cyclical maintenance is an easy win. Waiting until leaks appear means working under pressure with less control over timing. Failed sealant in a building in West Kensington can quickly affect neighbours, tenants or the floor below. Putting it right early is less disruptive than dealing with the consequences.
A quote for mastic joints depends on quantities, condition and access. Call for a quote.
Why us?
- A Constructionline member, so easy to vet
- Colour agreed before work starts
- Health and safety: CHAS accredited
- Fully insured, including public liability cover
Read how commercial sealant jobs are priced or our accreditations and insurance.
How we handle mastic sealing in West Kensington
Owners and agents typically inherit a building’s mastic rather than choose it, and it ages quietly: window perimeters, door frames, external joints and communal junctions all rely on it. Once it cracks, hardens or comes away, draughts and water find a way in along with complaints. Site teams most often ask us about a mix of products and colours from past repairs and draught complaints from residents or tenants, on external wall and movement joints, shopfronts below residential blocks and communal entrances and stairwells. Looking for mastic applicators who cover West Kensington? We have been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. Work is planned with the agent so residents get notice and access is arranged in advance.
Every job we finish is backed by a 12-month workmanship guarantee, in West Kensington as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- West Kensington (W14, SW6, SW5)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Work for main contractors and building owners
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.
Diagnose, treat, sign off
We follow your site rules from the start: signing in, inductions and any permit to work. With the paperwork done, we take the joints in the sequence agreed with you. All of Greater London is in the ULEZ, and kerbside space in West Kensington can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We inspect each building and record the joints that have failed.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- New sealant goes in with backing rod and primer where needed.
- Each building is checked and signed off with the 12-month guarantee.
Getting the site ready
- Clear stock, furniture or equipment away from the joints
- Share your working hours and any access restrictions
- Send any specification or drawings in advance
Ask for a quote
A handful of photos and a postcode is the fastest way to a quote. Upload them with the quote form, or phone 01277 525 020 or email us to discuss it first.
Advice
Nearby places to West Kensington
What else we do in West Kensington
Questions about West Kensington
Do you work in London buildings with loading restrictions?
Yes, most London buildings have access rules of some kind, and we plan around them. The building manager’s rules go straight into our method. The ULEZ covers the whole of Greater London, which we allow for
Can you quote for a block close to Kensington Olympia station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Give us the building’s details and say how residents are notified, and we will quote and plan to suit.
Is it fine to apply new sealant on top of old?
No. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.
How do you handle work on occupied blocks?
Residents and tenants carry on as normal. We flag any areas that need internal access well before the dates so you can arrange it with occupiers.
Does weather matter for sealant work?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.
Can you seal joints high up on a block?
Every block is different. We agree access with you at quote stage so there are no surprises.
How many days will you need on site?
That varies with the scale of the job, though a typical visit usually takes anything from a day to a few weeks, depending on the number of buildings and joints. For bigger or phased jobs, we will set out a timescale with the quote.
Quoting for work in West Kensington
Quotes vary with the job. It mainly depends on:
- How accessible the joints are
- Travel to remote or island sites
- The total length or number of joints
- How much existing material needs removing
What a job costs comes down to how many linear metres there are, what has to come out first and the access. Call for a fixed quote when you are ready.
What to include in your enquiry
To price the job accurately, we need a clear picture of the site. Useful things to include:
- The product your specification calls for
- Whether the building will be occupied during the work
- The asbestos register, for older buildings
- Any dates the work must fit around
For a fixed quote, give us a call on 01277 525 020 or send photos by email. You can also send details through our quote form.
Common problems we fix in West Kensington
In communal areas, joints take knocks from bins, bikes, buggies and deliveries, with joints near the floor and around doors suffering most. Regular cleaning wears them further.
These are often picked up first by site or facilities staff:
- Draughts at frames across a block
- Estate-wide sealant that is simply worn out
- Complaints coming in block by block
- Water getting in round frames after rain
Older community buildings, St Cuthbert's among them, often have frames of mixed ages whose mastic varies.
Questions to ask before you book
- Their pre-qualification and accreditations
- Their approach to joint depth and backing
- What level of public liability insurance do they hold?
- How they’ll work around occupants
Aftercare for building managers
Keep the joints in good shape with a few simple steps:
- Protect low-level joints in entrances
- Track which buildings were done and when
- Check sealant joints during planned building inspections
- List the paperwork your organisation requires when you send details
Keep records of when each building was resealed. That makes future programmes easier to plan and shows what was done.
Failed mastic often goes unnoticed until heavy rain finds it. Resealing when cracking first shows avoids water damage and saves internal repairs.
Block-wide mastic in West Kensington
In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. We fit the programme to your notice periods.
If you manage student housing near a university such as University of Westminster, 0.6 miles north of West Kensington, the summer turnaround is the time for mastic. Schools and community buildings such as The Fulham Boys School need frame and external mastic kept sound like any building.
West Kensington is about 1 mile south of Kensington, in Greater London. Across the W14 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 764 places in Greater London, large and small.
Work on mastic joints is covered throughout W14, SW6 and SW5, for business premises of every kind. Among the streets we cover are Sun Road, Star Road and Field Road, and sites on any of them can send details for a fixed quote. Just outside West Kensington, we also work in North End (1 mile west), Brook Green (1 mile north-west), Fulham (1 mile south), Hammersmith (1 mile west) and Brackenbury Village (1 mile north-west). Further afield, our area takes in London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Local landmarks in West Kensington
Recent enquiries here include premises near Avonmore Primary School, Gwendwr Garden and Seven Stars pub, among other places. The nearest railway station is Kensington Olympia station, about 0.5 miles north. Nearby you’ll also find Chelsea Stadium Tour And Museum (1 mile south-east) and Fulham Hospital (0.6 miles south-west). Open spaces near West Kensington include Campden Hill and The Long Water.