Greater London · England
New-build mastic & snagging in Old Town, Greater London
Specialist new build mastic for Old Town: careful preparation, the right product and tidy work. Call for a quick quote.
- Plot mastic for developers ahead of handover
- Joints pulling apart as timber shrinks
- Frame joints opening as the plaster dries
New build mastic in Old Town, done properly
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks. Common call-outs are for gaps opening as the house dries out and settles and messy sealant that spoils new finishes, across plot handovers, show homes and bathrooms & en suites.
Much of London’s new housing is flats in larger developments. Snagging there often goes through the developer or managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
Big or small, you get the same one-year guarantee.
- Place
- Old Town (CR0, CR9, CR90)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
New homes and floors in Old Town
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near West Croydon station, the sealant around baths, showers and frames is worth checking in the first year or two.
Old Town is about 1 mile north-west of Croydon, in Greater London. Across the CR0 area, we cover new build mastic for homes and businesses. 764 places in Greater London are on our list. London is on our list too, about 9 miles from Old Town.
Work in CR0, CR9 and CR90 works the same way as everywhere else we cover. You will find streets such as Park Lane, Fell Road and Abbey Road, and we cover them all. If you are just outside Old Town, we cover Waddon (1 mile south-west), Broad Green (1 mile north), Beddington (1 mile west), Bandonhill (1 mile south-west) and Russell Hill (2 miles south-west). We also work in nearby towns such as London (9 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
Landmarks near Old Town
Typical jobs here are in homes near Rutherford School, The Gun Tavern and St Andrew's CofE School, among other places. There’s a railway station in Old Town itself: West Croydon station. Nearby you will also find Croydon University Hospital (1.2 miles north) and Croydon Airport Visitor Centre (1.3 miles south-west). Not far away are Roundshaw Downs and Duppas Hill.
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours in a single home. For a job in Old Town, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- We clean off dust from the build and prime the surfaces where the product needs it.
- 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.
Getting ready for the visit
- Clear items away from the joints we are working on
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
Get a quote
Want a quote for new build mastic? Please call 0345 464 0079 or drop 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.
Related advice
Different surfaces, different methods
Skirting and floors
New homes often develop a gap between skirting and floor. A flexible sealant closes it without cracking like caulk.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish to a tidy standard. Tell us when the home is open so we can plan around it.
Work for landlords, hotels and businesses
For anyone letting property in or around Old Town, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Clean sealant with mild detergent, not abrasives
- Keep pictures and emails about snagging items
- Act quickly if a seal starts to leak
- Raise failed sealant with the developer while you’re covered
Leave the sealant for the cure time we give you before showering or bathing. Most silicones need around a day to cure enough for use.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black saves a harder job later.
Old Town: your questions answered
Is Old Town in your area for new build mastic?
Yes, Old Town is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Is parking a problem for a job in Old Town?
Parking in Old Town, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
My new home is still under warranty. Should I contact you?
Start with the builder if you’re in the snagging or warranty period. If it is not resolved, we can reseal it properly.
How long does new build mastic take?
That depends on how much there is to do, but as a guide it takes anything from a few hours to several days, depending on the number of plots. We will give you a better idea when we quote.
Do you work through snagging lists?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before work begins.
What does new build mastic cost?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email with a short description of the job.
Do you work for developers?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. We clean and prime joints properly to keep callbacks down.
Can you match the sealant colour to my new kitchen or bathroom?
White and clear are the most common, but other colours are available. We choose one to suit the room before we begin.
When to call us in Old Town
Sealant applied onto damp surfaces does not bond well. Site programmes do not always leave time for joints to dry first.
These are the problems we are asked about most:
- Sealant applied over dusty or wet surfaces
- Leaking shower tray seals in a new home
- Skirting joints opening in the first winter
- Cracks appearing as a new home settles
Old Town is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Before booking anyone
- How long to leave it before use
- How hidden problems are handled
- Whether you can choose the colour
- Whether all the old sealant comes out first
Nearby places to Old Town
Other services in Old Town
What we can’t put right
It helps to know what we can’t do too:
- A tray or bath that is not properly supported, until it’s fixed
- Leaking fittings rather than failed sealant
- Settlement cracks that need a surveyor
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before you book.
What we seal
- Bathrooms & en suites
- Show homes
- Plot handovers
- Windows & doors
- Skirting & floors
- Kitchens
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
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.