Greater London · England
Crouch End New Build Mastic
New build mastic across Crouch End and nearby, with old sealant always removed completely and a one-year guarantee.
- Sealant that never bonded to the surface
- Sealant work across a run of new homes
- Gaps between new skirting and floors
New build mastic for homes and businesses in Crouch End
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. We work on plot handovers, skirting & floors and show homes, and the jobs we see most are leaking shower tray seals in a new home and sealant applied over dusty or wet surfaces.
Across London, commercial floors have movement joints that break down under heavy foot traffic, while new homes need a neat, sound finish around frames, baths and kitchens before handover.
Big or small, you get the same one-year guarantee in Crouch End and across Greater London.
- Where
- Crouch End (N8, N19, N4)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for most snagging lists, longer for a run of plots. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Crouch End. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Each area is checked and left with its cure time.
How to prepare
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Clear items away from the joints we are working on
How to get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
Advice
Keeping the joints in good condition
Looking after new joints is easy:
- Wait for the cure time before using a resealed shower
- Don’t wait for the house to settle if water is getting through
- Open a window or run the fan after bathing
- Watch for new gaps as the house dries out
Clean the sealant with a mild detergent and a soft cloth. Keep scourers and harsh chemicals off it.
Early snagging is easier snagging. Left alone, a small crack can become a leak.
Also near Crouch End
What else we do in Crouch End
What happens if it’s left?
If you are still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or is not dealt with, we can reseal it properly. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why us?
- A choice of colours where the product allows
- We agree the colour with you first
- Sealant colour chosen to suit
- Rated 4.9 stars on Google
See what affects the cost and what customers say.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Plumbing faults behind the sealant
- Structural cracks in walls or ceilings
- A tray or bath that is not properly supported, until it’s fixed
If in doubt, ring 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Windows & doors
- Kitchens
- Show homes
- Plot handovers
- Bathrooms & en suites
- Skirting & floors
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Letting agents and landlords in Crouch End can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Surface by surface
Bathrooms and en suites
Trays and baths in new builds settle as they’re used. We reseal once the old bead is fully out.
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing.
Do you need new build mastic in Crouch End?
When the heating goes on in the first winter, the house dries fast. Skirting, frames and worktops pull away slightly.
Any of these means the joints need attention:
- Gaps opening as the house dries out and settles
- Sealant work across a run of new homes
- Cracked caulk along new skirting
- Cracked sealant around new window and door frames
As a London address, Crouch End can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- What the quote includes, VAT included or not
- What preparation is included
- What the cure time is
- Whether you can choose the colour
New build mastic around Crouch End
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For new homes near Crouch Hill station, it’s worth checking the sealant early, while snags are still fresh.
Crouch End is about 2 miles north-west of Highbury, in Greater London. We provide new build mastic to homes and businesses in Crouch End, as part of our work across Greater London. Crouch End is one of 764 places in Greater London we cover. Our London page covers work nearby.
Jobs for new build mastic in N8, N19 and N4 is quoted and booked the same way as anywhere else. New build mastic is available to properties on New Road, Park Road and Ella Road and the roads around them. Other places close to Crouch End include Hornsey (1 mile north-east), Stroud Green (1 mile east), Turnpike Lane (1 mile north-east), Highgate (1 mile south-west) and Upper Holloway (1 mile south). We also work in nearby towns such as London (6 miles south), City of Westminster (5 miles south), Marylebone (4 miles south), Kensington (6 miles south-west), St Pancras (4 miles south) and Shoreditch (4 miles south-east).
Near you in Crouch End
In Crouch End, that means homes and buildings near Asanté Academy of Chinese Medicine, Hornsey School for Girls and Queens pub. The nearest railway station is Crouch Hill station, about 0.7 miles south-east of the centre. Nearby you’ll also find Montfichet's Tower (4.7 miles south) and Hornsey Central Hospital (less than half a mile north-west). Open spaces near Crouch End include Parkland Walk and Darland's Lake.
Crouch End: your questions answered
Can parking be tricky for a visit in Crouch End?
Parking in Crouch End, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you work for landlords with property near Crouch Hill station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does new build mastic take?
That depends on the amount of work, but most jobs take anything from a few hours to several days, depending on the number of plots. We will tell you when we quote.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can you do plot mastic on a new development?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
Can you reseal over the builder’s sealant?
No. Over-sealing traps mould and water and soon fails. All the old sealant comes out before any work starts.