Greater London · England
New-build mastic & snagging in Totteridge, Greater London
Plot mastic for developers and snagging failed sealant in new homes for Totteridge, backed by a 12-month guarantee. Call for a quick quote.
- Sealant applied over dusty or wet surfaces
- Cracked sealant around new window and door frames
- Kitchen sealant that has pulled off the wall
What we’re called out for in Totteridge
On many sites, sealant goes on in the final rush before handover. Dusty, unprimed joints are common, and the sealant sits on grit instead of the surface.
Signs it’s time to call us include:
- Messy sealant that spoils new finishes
- Leaking shower tray seals in a new home
- Kitchen sealant that has pulled off the wall
- Gaps between new skirting and floors
For new homes near Oakleigh Park station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before booking
- What insurance they hold
- What the cure time is
- Whether they seal over old material or remove it
- Is VAT in the price?
About our new build mastic in Totteridge
A new house keeps drying out and settling for its first couple of years. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. We work on skirting & floors, bathrooms & en suites and show homes, and the jobs we see most are untidy sealant flagged on a snagging list and cracks appearing as a new home settles.
London homes range from new-build flats to period conversions with new floors laid over old boards. Every joint between floor, skirting and threshold has to cope with some movement.
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
- Totteridge (N20, EN5)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
The builder is normally the first port of call while the snagging or warranty period runs. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Totteridge customers choose us
- Every job guaranteed for a year
- You choose the colour before work begins
- Sealant colour chosen to suit
- Over 20 years’ experience
Take a look at our cost guide or what customers say.
How it works
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours in a single home, depending on the size of the job. For a job in Totteridge, 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.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out.
- Joints are vacuumed and cleaned of building dust.
- 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
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Get a quote
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Advice
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
For anyone letting property in or around Totteridge, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Common questions in Totteridge
I let a flat near Oakleigh Park station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Can parking be tricky for a visit in Totteridge?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
When is the best time to reseal in a new build?
That depends on the joint. A leaking shower or bath seal should be redone right away, while small cosmetic gaps can wait a while.
My new home is still under warranty. Should I contact you?
Report it to the builder first while you are covered. If it is not resolved, we will cut it out and reseal it.
Why has my new-build shower seal failed already?
Cracking in the first couple of years is common. Poor preparation at handover adds to it.
How long does the job take?
Most jobs take a few hours in a single home. We will confirm how long when we quote.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses.
Where is Mr Mastic based?
We’re based in Crawley, and we work across South East England, London and Scotland.
Different surfaces, different methods
Skirting and floors
Floors and skirting move as the house dries and the heating runs. Caulk cracks; a flexible sealant moves with it.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Joints and finishes in Totteridge 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. Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent.
Totteridge is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Totteridge is about 1 mile south-west of Barnet, in Greater London. If you need new build mastic in Totteridge, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Greater London from our Crawley base. Totteridge is one of 764 towns and villages in Greater London we cover for new build mastic. For nearby work, see our London page.
Every address in N20 and EN5 is covered for new build mastic. We cover properties on Barnet Lane, Grange Avenue and Chestnut Lane. Close by, we work in Hadley (1 mile north), High Barnet (1 mile north), Arkley (2 miles north-west), Mill Hill (2 miles south-west) and Rowley Green (2 miles north-west). Within a short drive, we also cover London (10 miles south-east), City of Westminster (9 miles south), Marylebone (8 miles south), Kensington (9 miles south), St Pancras (8 miles south-east) and Shoreditch (9 miles south-east).
Local landmarks in Totteridge
Locally, jobs take us to homes and businesses close to Francis Skaryna Belarusian Library and Museum, Susi Earnshaw Theatre School and Brook Farm Open Space and the streets around them. The nearest railway station is Oakleigh Park station, roughly 1.5 miles east of the centre. Well-known places in the area include Francis Skaryna Belarusian Library and Museum (1.5 miles south-east) and Barnet General Hospital (1.3 miles north-west). The countryside around Totteridge includes Totteridge Green and Darland's Lake.
How we quote for new build mastic
For a quick quote, just ask. What matters most is:
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Any mould that needs treating
- The size of the job
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us and we will talk you through it.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- Whether it has been sealed before
- Photos by email, if that’s easy
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or send us an email.
DIY versus a professional finish
If you are 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.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.