Greater London · England
New Build Mastic in North Cheam
Our applicators work in North Cheam on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Sealant work across a run of new homes
- Leaking shower tray seals in a new home
- Cracks appearing as a new home settles
New build mastic for homes and businesses in North Cheam
Developers send us the plot schedule and we work through it. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover using the right product for each joint. We work on windows & doors, plot handovers and bathrooms & en suites, and people most often call us about beads laid onto grit and dust from the build and kitchen sealant that has pulled off the wall.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, and new homes need their plot mastic finished properly before handover, in North Cheam and beyond.
Big or small, you get the same one-year guarantee.
- Place
- North Cheam (SM3, KT4, SM1)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
It helps to know what we cannot do:
- Leaks from pipes, valves or wastes, which need a plumber
- Your warranty claim itself, which is between you and the builder
- Structural cracks in walls or ceilings
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Plot handovers
- Kitchens
- Windows & doors
Why it’s worth doing now in North Cheam
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first.
What you get with us
- A sealant colour to suit the surroundings
- Sanitary silicone with an anti-fungal additive in wet areas
- White, clear, grey or coloured to suit, where the product allows
- Quality sealants from Arbo and Everbuild
Take a look at our cost guide and customer reviews.
How the job changes by surface
Windows and doors
Draughts around new frames are often a sealant gap. We look at the joints and reseal where needed.
Show homes
We can refresh show-home sealant that has discoloured or been knocked. The old bead comes out and a clean new one goes in.
How the visit works
On the day, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work starts. The work normally takes anything from a few hours to several days, depending on the number of plots. In North Cheam, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Getting ready for the visit
- Move anything stored near the joints
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Related advice
What new build mastic looks like in North Cheam
Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
North Cheam is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
North Cheam is about 3 miles north-east of Epsom, in Greater London. For new build mastic in and around North Cheam, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, and North Cheam is one of them. For nearby work, see our London page, about 10 miles away.
We work across the SM3, KT4 and SM1 postcode area for new build mastic and the streets around it. If you need new build mastic at a property on Glyn Road, Covey Road and Lloyd Road or a nearby road, we can help. We also cover Cuddington (1 mile south-west), Lower Morden (1 mile north), Sutton Common (1 mile north-east), Stoneleigh (1 mile south-west) and Morden (2 miles north). Larger places within reach include London (10 miles north-east), City of Westminster (10 miles north), Marylebone (11 miles north), Kensington (9 miles north), St Pancras (12 miles north) and Shoreditch (12 miles north-east).
Landmarks near North Cheam
Around North Cheam, our work takes us to homes and buildings near The Nonsuch Inn, Sutton College of Learning for Adults and Nonsuch Park, among other places. North Cheam’s nearest station is West Sutton station, about 0.8 miles south-east. Well-known places in the area include Chessington Castle Hill (3.2 miles west) and St. Anthony's Hospital (0.6 miles north). Open spaces near North Cheam include Henman Hill and Derwent Floodwash.
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A DIY attempt does not rule out a professional job. We cut it out and start again.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Don’t seal over failed sealant yourself
- Raise failed sealant with the developer while you’re covered
- Keep pictures and emails about snagging items
- Follow the cure time we give you
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry.
Early snagging is easier snagging. Small faults turn into leaks if left.
Also near North Cheam
More services for North Cheam
Questions from North Cheam
Can you do new build mastic in North Cheam?
Yes, North Cheam is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Can parking be tricky for a visit in North Cheam?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Are you insured?
Yes. We’re fully insured.
How long does new build mastic take?
Most jobs take a few hours in a single home, including preparation and clearing up. We will confirm how long when we quote.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do you work for developers?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you when we finish.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we’re using and why.
Signs you need new build mastic in North Cheam
If plaster or screed was still damp when it was sealed, the bond suffers. Site programmes don’t always leave time for joints to dry.
These are the problems we’re asked about most:
- Gaps behind new kitchen upstands
- Untidy sealant flagged on a snagging list
- Frame joints opening as the plaster dries
- Cracked caulk along new skirting
If you’ve bought a new home near West Sutton station, the sealant around baths, showers and frames is worth checking in the first year or two.
Questions to ask before you book
- Who does the work, and how experienced they are
- How long to leave it before use
- How hidden problems are handled
- Which sealant they’ll use, and why