Greater London · England
New Build Mastic in Croydon
Plot mastic for developers and snagging failed sealant in new homes for Croydon, backed by a one-year guarantee. Call for a quick quote.
- Beads laid onto grit and dust from the build
- Gaps between new skirting and floors
- Second-fix sealing on new plots
Aftercare tips
After the cure time, these simple habits help:
- Watch for new gaps as the house dries out
- Clean sealant with mild detergent, not abrasives
- Do not seal over failed sealant yourself
- Follow the cure time we give you
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak.
New build mastic in Croydon
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 since hurried prep is behind a lot of new-build failures. We work on plot handovers, show homes and bathrooms & en suites, and the jobs we see most are sealant work across a run of new homes and gaps opening as the house dries out and settles.
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 Croydon and beyond.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or send us an email.
- Location
- Croydon (CR0, CR2, CR9, CR8)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Places near Croydon
What else we do in Croydon
Croydon questions
Do you work for landlords with property near South Croydon station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Is parking an issue for new build mastic in Croydon?
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.
Can I send you my snagging list?
Yes. Send us the sealant items on the list, with pictures if you can. We will tell you if anything on it isn’t a sealant job.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and we clear up when we’re done.
Do you cover Croydon?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, Croydon included.
Who should fix failed sealant in a new build?
Your builder, if you are still in their snagging or warranty period. After that, or if their repair keeps failing, we can do it.
Is there a guarantee?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Common problems we fix in Croydon
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
The most common problems we see are:
- Cracked sealant around new window and door frames
- Joints pulling apart as timber shrinks
- Plot mastic for developers ahead of handover
- Leaking shower tray seals in a new home
Croydon is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What to look for in a quote
- Is VAT in the price?
- How hidden problems are handled
- What guarantee comes with the work
- How long to leave it before use
The process
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes anything from a few hours to several days, depending on the number of plots, depending on the size of the job. 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.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
How to get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.
Advice
New homes and floors in Croydon
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or 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.
If you’ve bought a new home near South Croydon station, the sealant around baths, showers and frames is worth checking in the first year or two.
Croydon is about 9 miles south of London, in Greater London. Jobs in Croydon get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 764 places across Greater London. For nearby work, see our London page (9 miles or so).
We cover every part of CR0, CR2, CR9 and CR8 for new build mastic. Streets in the area include High Street, Church Road and Ruskin Square. Main roads around Croydon include the A235 and B243, so getting to you is simple. Other places close to Croydon include South Croydon (1 mile south), Coombe (1 mile east), Addiscombe (2 miles north-east), Ashburton (2 miles north-east) and Woodside (2 miles north-east). Within a short drive, we also cover London (9 miles north), City of Westminster (10 miles north), Marylebone (11 miles north), Kensington (10 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
Local landmarks in Croydon
We work in homes and buildings around Cambridge Tutors College, Rutherford School and Keg & Grill pub. Croydon has its own railway station: South Croydon station. Other landmarks nearby include Croydon Airport Visitor Centre (1.2 miles south-west) and Croydon University Hospital (1.7 miles north). The countryside around Croydon includes Roundshaw Downs and Duppas Hill.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Disputes or warranty claims with your builder
- Leaks from pipes, valves or wastes, which need a plumber
- Broken tiles or a split tray
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Surfaces we seal
- Windows & doors
- Plot handovers
- Kitchens
- Skirting & floors
- Bathrooms & en suites
- Show homes
For landlords and businesses
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
How the job changes by surface
Plot handovers
Send us the schedule and any sealant specification and we will quote. We seal bathrooms, kitchens, frames and floors to the agreed spec.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish to a tidy standard. We’ll plan around viewing times.
Why act early in Croydon
Resealing everything on a snagging list in one visit is usually simpler than chasing joints one at a time. It’s one visit, one quote and one set of cure times. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Croydon, the repair is bigger than a sealant job.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why book with us
- Over 20 years’ experience
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- 12-month guarantee on every job