Greater London · England
New-build mastic & snagging in Kennington, Greater London
New-build sealant joints in Kennington need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Gaps between new skirting and floors
- Shower seals failing in the first year or two
- Cracked sealant around new window and door frames
About our new build mastic in Kennington
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. In both, preparation makes the difference. Typical jobs include smeared, uneven beads picked up at snagging and joints pulling apart as timber shrinks, across skirting & floors, bathrooms & en suites and kitchens.
London homes range from new-build flats to period conversions with new floors laid over old boards. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
You are covered for a year from the day we finish. If anything isn’t right with it, call 0345 464 0079 or send us an email.
- Where
- Kennington (SW8, SW1P, SE11)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Your questions about new build mastic in Kennington
Can you do new build mastic in Kennington?
Yes. Our work covers London and the South East, and Kennington is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Is parking a problem for a job in Kennington?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Is there a guarantee?
Yes. All our work carries our one-year guarantee.
Why has my new-build shower seal failed already?
New homes dry out and move in their first couple of years, and sealant is often rushed onto dusty, unprimed surfaces. Either can make it fail early.
Will you just run a new bead over the existing one?
No. We always remove the existing bead, the joint cleaned and primed where needed, before resealing.
Where are you based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Cracked trays, tiles or worktops
- Movement caused by a poorly fitted tray or bath
- Disputes or warranty claims with your builder
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Plot handovers
- Kitchens
- Windows & doors
Joints and finishes in Kennington homes
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
As a London address, Kennington can be tricky for parking: let us know about parking bays, permits or a driveway.
Kennington is about 2 miles south-west of London, in Greater London. Every kind of property in Kennington is covered for new build mastic. The work is guaranteed for a year. Across Greater London, we cover 764 places, and Kennington is one of them.
Every address in SW8, SW1P and SE11 is covered for new build mastic. That includes homes and businesses on Kay Road, Lett Road and Rita Road and the roads around them. Kennington sits on or near the A203 and A3204, which makes travel easy. If you’re just outside Kennington, we cover Oval (1 mile north), South Lambeth (1 mile south-west), Little Portugal (1 mile south), North Brixton (1 mile south-east) and Vauxhall (1 mile north). Larger places within reach include City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (4 miles west), St Pancras (3 miles north), Shoreditch (4 miles north-east) and Walthamstow (8 miles north-east).
Local landmarks in Kennington
In Kennington, that means homes and buildings near St Peter's School, Archbishop Tenison's Church of England School and Lambeth Palace Library, among other places. Also close by are Crown and Thistle pub (within half a mile south-west) and Vauxhall Park (less than half a mile north-west). There’s a railway station in Kennington itself: Vauxhall station. A little further out are Baynard's Castle (2.2 miles north) and Type Museum (0.5 miles south). Open spaces near Kennington include Bellenden Road Nature Garden and Ludgate Hill.
What the job involves on each surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Skirting and floors
New homes often develop a gap between skirting and floor. A flexible sealant closes it without cracking like caulk.
Places near Kennington
What else we do in Kennington
How the visit works
At the end, we look at the finished work together. The work normally takes a few hours for most snagging lists, longer for a run of plots, depending on how much there is to do. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Before we arrive
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
Ask for a quote
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Read more
Do you need new build mastic in Kennington?
Once people move in, baths and trays take weight and bed down. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used and can tear.
The problems people usually mention when they call include:
- Frame joints opening as the plaster dries
- Gaps behind new kitchen upstands
- Untidy sealant flagged on a snagging list
- Joints pulling apart as timber shrinks
For new homes near Vauxhall station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- What happens if the job turns out different
- What product goes in the joint
- What insurance they hold
- Whether all the old sealant comes out first
What affects the cost of new build mastic
For a quick quote, just ask. The main things that affect it are:
- The size of the job
- The number of rooms or windows
- The type of sealant required
- Working hours on commercial sites
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Photos by email, if that is easy
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- What’s wrong with the joints now
For new build mastic in Kennington, call 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before work begins.