Construction Mastic in South Kensington
We carry out mastic packages for new-build and refurbishment projects in South Kensington. Send photos or drawings for a fixed quote.
- External joints sealed in damp or cold conditions that are now failing
- Window and door perimeters that won’t pass inspection
- Oversized or tapered gaps around new frames
Construction mastic near South Kensington
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
How we handle construction mastic in South Kensington
Perimeter sealing outside needs a dry joint and the right temperature. Cold or damp mornings, frost and condensation on frames can all hold external sealing up. Internal sealing often fills those days. Most enquiries involve external joints sealed in damp or cold conditions that are now failing and inconsistent sealant finishes from plot to plot, on internal decorators’ caulk, floor and skirting junctions and window and door perimeters. One point of contact handles commercial sealant work in South Kensington from the first photos to the final walk-round, for single jobs and planned programmes alike.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in South Kensington must meet its standards or pay the daily charge. Alongside that, sites usually need booked deliveries and a plan for where materials go.
Whoever the client is, the cover is the same: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we’re upfront about that.
- Place
- South Kensington (SW3, SW7, SW10)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
South Kensington: questions and answers
Is a hospital such as The Royal Marsden Hospital somewhere you can work?
Yes. We work in healthcare settings as well as offices and schools. Each area is agreed with the ward or department and the estates team in advance.
Can you work at a site such as Brompton Cross District Shopping Centre., by South Kensington?
Yes. Our area takes in South Kensington and its surroundings, with estates and business parks such as Brompton Cross District Shopping Centre. Included. To start, just speak to us on 01277 525 020 or email a schedule or drawings with the unit, the joints involved and your access times.
Do you do internal caulk as well as external mastic?
The scope comes from the specification and drawings, but most packages include frame perimeters, sanitary and kitchen joints, caulking where specified and a snagging pass.
When can you be on site?
Give us your site hours and any access windows in your enquiry, and we will schedule the work to suit. Our office runs Monday to Friday, 8am until 5pm.
Are you fully insured?
Yes. Our insurance certificate can be sent alongside the quote.
Will you stick to the specified products?
We use the product the specification names. Any suggested alternative is put to you before anything changes.
What happens if old sealant might contain asbestos?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. We don’t remove asbestos-containing materials.
Commercial clients in South Kensington
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.
Whether you are a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
Our process
In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed before the next one starts. In South Kensington, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- We start with the drawings, specification and programme.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Plots or floors are sealed as they’re handed over.
- Every joint is cleaned, set to depth and sealed with the specified product.
- Snags are cleared and the package signed off with our 12-month guarantee.
Before we start on site
- Tell us your opening times and when work is allowed
- Agree which areas must stay open
- Warn occupants and staff about the work
Request a quote
For a fixed quote, ring 01277 525 020 or send details through our quote form. Our quote form is another easy route.
Related advice
When something else is needed
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Defective windows, doors or glazing units (the supplier or installer’s job)
- Damage to finishes by other trades after we have sealed
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
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.
Joints and surfaces we work on
- Window and door perimeters
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Floor and skirting junctions
- Cladding and panel joints
- Brick and block movement joints
Should maintenance staff do it?
Redoing a failed joint typically costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Towns and villages near South Kensington
Other services in South Kensington
Why it’s worth doing now in South Kensington
A quick bead over a damaged joint can get an area past inspection, but it won’t last. Sealant can’t grip a contaminated or existing bead. Damaged joints are removed and resealed from clean faces. In a London building, a failed joint rarely affects only one party. Putting it right early is less disruptive than dealing with the consequences.
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote.
What you get with us
- Commercial sealant work since 2005
- One number for every site we cover
- Colours confirmed for the specified product
- Specification-led, product-correct work
Read how commercial sealant jobs are priced or our accreditations.
Sites and facades in and around South Kensington
South Kensington has plenty of hotels close by, all within 2 miles. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in South Kensington. Deliveries are booked and storage is tight, so mastic materials come in as needed.
For contractors on a campus like Faculty of Medicine (Imperial College London), under half a mile to the east of South Kensington, facade and perimeter sealing has to fit around students and term dates. When a college such as St Mellitus Theological College (0.5 miles west of South Kensington) builds or refurbishes, the mastic package usually has to fit around students and staff.
South Kensington is about 1 mile south-east of Kensington, in Greater London. Any commercial site in South Kensington is covered. 764 places across Greater London fall within our area, South Kensington among them.
Work on mastic packages is covered throughout SW3, SW7 and SW10, for business premises of every kind. Among the streets we cover are King's Road, Fulham Road and Museum Lane, and sites on any of them can send details for a fixed quote. You’ll find South Kensington on or near the A3217. Close to South Kensington, our area also takes in Little Chelsea (1 mile south), Chelsea (1 mile east), Brompton (1 mile north-east), World's End (1 mile south) and Earl's Court (1 mile west). A short drive away, we cover London (4 miles east), St Pancras (4 miles north-east), Shoreditch (5 miles north-east), Walthamstow (9 miles north-east), Hoxton (5 miles north-east) and Whitechapel (5 miles east).
Local landmarks in South Kensington
Recent enquiries here include premises near London School of Dramatic Art, Burton’s Court and Anglesea Arms. Other local landmarks include Natural History Museum Library and Archives (under half a mile north) and Collingham College (0.5 miles west). South Kensington’s nearest station is West Brompton station, about 0.8 miles west. Nearby you’ll also find Victoria and Albert Museum Spiral (less than half a mile north) and Baynard's Castle (3.6 miles north-east). Green spaces nearby include Serpentine and Campden Hill.
When to call us in South Kensington
Shrinkage and settlement in the first months put new joints under strain. Materials lose construction moisture and shrink. Picking a flexible sealant where there’s movement keeps snags down.
Site and facilities staff are often the first to spot these:
- Perimeter gaps outside the sealant’s range
- Frame perimeters left unsealed or poorly sealed
- Old sealant on a refurbishment that needs stripping before new work
- External joints sealed in damp or cold conditions that are now failing
For a contractor working at a hospital such as The Royal Marsden Hospital, under half a mile to the east of South Kensington, perimeter and facade sealing is planned around patients and deliveries.
Questions to ask before you book
- Will failed sealant be removed rather than covered?
- The named product and why it was chosen
- What site paperwork they can supply
- Their plan for phasing and protecting the area