West Kensington construction mastic
Mastic packages for new-build and refurbishment projects in West Kensington and across Greater London. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Mastic snags holding up handover
- New external sealant already peeling away
- Frame gaps too wide for sealant alone
Need construction mastic in West Kensington?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Surface by surface
Snagging before handover
Snagging is often the final mastic stage. We can work through the snag list area by area and damaged joints are redone rather than patched.
Window and door perimeters
Internal perimeters are usually sealed with a paintable product where decorating follows. The specification decides which with colours matched to the frame where needed.
Construction mastic in West Kensington
Mastic Doctor has been a subcontractor on construction projects for over 20 years. Quantities come off the drawings, the sequence is agreed with the site manager and the work follows the trades. For construction mastic on a scheme in West Kensington, send drawings through our quote form, or phone or email us to talk it through. We work on brick and block movement joints, internal decorators’ caulk and window and door perimeters, and the usual reasons a site gets in touch are oversized or tapered gaps around new frames and failed sealant in an existing building being refurbished. Facilities teams, main contractors and managing agents in West Kensington tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
Every London site, West Kensington included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Alongside that, sites normally need booked deliveries and a plan for where materials go.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we are clear about what is covered before work starts.
- Where
- West Kensington (W14, SW6, SW5)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Places near West Kensington
More services for West Kensington
Questions about West Kensington
Can you work around term dates at a campus such as University of Westminster?
Yes, holiday working periods are the norm on campus jobs. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Can you work in a London building with booked loading and goods-lift slots?
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 staff carry on working while you’re here?
Typically, yes. We phase the work so most of the building stays in use, with each area protected and signed.
What joints do you seal on a new build?
The scope comes from the specification and drawings, but frames, sanitary, kitchens, caulk where specified and snagging are typical.
Which sealant will you use?
The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
When can you be on site?
Give us your site hours and any access windows in your enquiry, and we will plan around them. Our office runs Monday to Friday, 8am until 5pm.
Are you CHAS accredited?
CHAS and Constructionline are both in place, and our applicators hold CSCS cards. We are fully insured for public liability.
Signs you need construction mastic in West Kensington
Dust is the enemy of adhesion on a construction site. Plaster dust, release agents, protective film residue and damp all stop sealant bonding, so preparation matters as much here as on a reseal.
Clients normally get in touch after noticing something like this:
- New external sealant already peeling away
- Cracks opening in caulked internal joints
- Old sealant on a refurbishment that needs stripping before new work
- Different trades sealing to different standards
For contractors refurbishing units at places like Berghem Mews Business Village, which lies north-west of West Kensington, the mastic covers cladding panels, roller-door and window perimeters.
Questions to ask before you book
- Which product they’ll use, and why it suits the joint
- Whether their applicators hold CSCS cards
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Will RAMS and insurance details be available?
Looking after the joints
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. Our advice:
- Get the mastic subcontractor involved early in the programme
- Release areas for mastic once other trades have finished in them
- Use the product the specification names
- Don’t force external sealing on a damp or frosty day
If a joint is damaged after sealing, flag it early. Snags can be picked up in a planned close-out visit.
External joints sealed in poor weather are a common cause of early failure. Waiting for a dry joint and the right temperature is better than redoing work.
How a job runs
We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Planning a London job such as one in West Kensington starts with access: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we’ll schedule to suit.
- We start with the drawings, specification and programme.
- Quantities are measured and a fixed price returned.
- We agree with the site team which areas come first.
- 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.
What we need from you
- For older buildings, check the asbestos register before work
- Point out any areas we must not close
- Send any specification or drawings in advance
Request a quote
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, give us a call on 01277 525 020 or email drawings and photos.
Related advice
Construction mastic around West Kensington: points for this area
There are a good number of hotels within about 2 miles of West Kensington. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. As part of Greater London, West Kensington is inside the ULEZ, which applies to every van on site. Add booked deliveries and tight storage, and the mastic package needs planning with the site team.
For contractors at a college like St Mellitus Theological College, which lies east of West Kensington, perimeters and internal sealant are timed for the holidays. University estates such as University of Westminster (to the north of West Kensington) tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal.
West Kensington is about 1 mile south of Kensington, in Greater London. Anywhere in W14, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 764 places in Greater London, from busy centres to rural villages.
We cover the W14, SW6 and SW5 postcode districts. If your site is on Sun Road, Star Road and Field Road or close by, send details and we’ll quote for mastic packages. If your building is just outside West Kensington, we cover 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). Nearby towns on our patch include 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. For rail, the closest station is Kensington Olympia station, roughly 0.5 miles north. Other landmarks nearby include 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.
What affects the price in West Kensington
A fixed quote reflects the actual work. It allows for:
- How accessible the joints are
- How much there is to seal
- Travel to remote or island sites
- Which sealant the job calls for
Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.
Before you send an enquiry
Diagnosis starts before we arrive. Let us know:
- A wide shot and a close-up of the area
- Approximate linear metres or a joint schedule
- The site address and postcode
- What the building is and how it’s used
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, ring 01277 525 020 or email us.
Owners, agents and contractors
We work for building owners and managing agents on everything from one building to a spread of sites around West Kensington. Several sites can go on one quote, so there’s one set of paperwork to deal with.
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.