Greater London · England
New Build Mastic in South Kensington
New build mastic across South Kensington and nearby, with old sealant always removed completely and a 12-month guarantee.
- Shower seals failing in the first year or two
- Gaps opening as the house dries out and settles
- Sealant that never bonded to the surface
Joints and finishes in South Kensington homes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
If you’ve bought a new home near West Brompton station, the sealant around baths, showers and frames is worth checking in the first year or two.
South Kensington is about 1 mile south-east of Kensington, in Greater London. If you need new build mastic in South Kensington, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We’re based in Crawley and cover Greater London. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
Here we cover the SW3, SW7 and SW10 postcode area for new build mastic. Local streets include King's Road, Fulham Road and Museum Lane, and we cover them all. You will find South Kensington on the A3217, so it’s easy for us to get to with everything needed for new build mastic. Neighbouring places we cover for new build mastic include 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). Within a short drive, we also 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).
Landmarks near South Kensington
Around South Kensington, our work takes us to homes and buildings near London School of Dramatic Art, Burton’s Court and Anglesea Arms. Nearby too are Natural History Museum Library and Archives (within 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 of the centre. Other landmarks nearby include Victoria and Albert Museum Spiral (within half a mile north) and Baynard's Castle (3.6 miles north-east). For a walk, there’s Serpentine and Campden Hill.
About our new build mastic in South Kensington
For builders and developers, we work through plots to the schedule you give us. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over. We work on plot handovers, windows & doors and skirting & floors, and people most often call us about messy sealant that spoils new finishes and cracks appearing as a new home settles.
Much of London’s new housing is flats in larger developments. In a new development, snags are often reported through the developer or the managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- South Kensington (SW3, SW7, SW10)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near South Kensington
Also in South Kensington
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Why it’s worth doing now in South Kensington
It often makes sense to do all the sealant items on a snagging list together. You get one visit and one clear quote for the lot. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
What you get with us
- More than 20 years in sealant work
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
- White, clear, grey or another colour, product permitting
How the job changes by surface
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. We seal it with a flexible sealant that copes with the movement.
What we cannot put right
Before booking, it’s worth knowing the limits too:
- Leaks from pipes, valves or wastes, which need a plumber
- Your warranty claim itself, which is between you and the builder
- Settlement cracks that need a surveyor
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Windows & doors
- Plot handovers
- Kitchens
Signs you need new build mastic in South Kensington
Once people move in, baths and trays take weight and bed down. A bath sealed empty drops slightly when filled, straining the joint and the sealant may split.
The most common problems we see are:
- New-build shower sealant that has already split
- Gaps opening as the house dries out and settles
- Cracked caulk along new skirting
- Internal frame sealant that has split
South Kensington is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Comparing quotes
- What insurance they hold
- Who turns up on the day
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
South Kensington: your questions answered
Do you work for landlords with property near West Brompton station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Is parking a problem for a job in South Kensington?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Can you work from my snagging list?
Yes. Send it with pictures and we will quote for the sealant items. If something is not sealant, we will say so.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
What should I tell you?
A short description and the location, plus pictures if you have them. We’ll ask anything else we need to know.
What does new build mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Quotes for new build mastic in South Kensington
For a quick quote, just ask. The main things that affect it are:
- The product the joint needs
- The number of rooms or windows
- Access and height
- Any mould that needs treating
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- How we’d reach the joints
- Photos by email, if that’s easy
- If someone has resealed it before
- The address or postcode of the job
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
The process
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for most snagging lists, longer for a run of plots. In a London area like South Kensington, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- The old bead comes out in full, with no layer left behind.
- Each joint is cleaned of dust and grit, then primed if required.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
Ask for a quote
Want a quote for new build mastic? Please call 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.