Greater London · England
New-build mastic & snagging in Highgate, Greater London
New build mastic across Highgate and nearby, with old sealant always removed completely and a one-year guarantee.
- New-build shower sealant that has already split
- Worktop and upstand sealant coming away
- Cracks appearing as a new home settles
Quotes for new build mastic in Highgate
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Which sealant suits the joint
- Any working-time requirements on site
- The old material and how stubborn it is
- Whether there’s mould to deal with
The cost depends on the amount of work, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Whether it’s a home or a business
- The address or postcode of the job
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
New build mastic for homes and businesses in Highgate
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly. If you are dealing with skirting joints opening in the first winter and sealant that never bonded to the surface, we can help.
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, in Highgate and beyond.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- Highgate (N6, N19, NW5)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Highgate
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
New build mastic around Highgate
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
As a London address, Highgate can be tricky for parking: let us know about parking bays, permits or a driveway.
Highgate is about 2 miles north-east of Hampstead, in Greater London. For new build mastic in and around Highgate, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We’re based in Crawley and cover Greater London, Highgate included. 764 places in Greater London are on our list.
Jobs for new build mastic in N6, N19 and NW5 is quoted and booked the same way as anywhere else. That includes homes and businesses on Wood Lane, Grange Road and Talbot Road. We also cover the places around Highgate: Upper Holloway (1 mile south-east), Dartmouth Park (1 mile south), Lissenden Gardens (1 mile south), Crouch End (1 mile north-east) and Tufnell Park (1 mile south-east). Larger places within reach include London (5 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south), Kensington (6 miles south-west), St Pancras (3 miles south) and Shoreditch (4 miles south-east).
Near you in Highgate
We work in homes and buildings around The Angel Inn, St Aloysius RC College and Whittington Park and the streets around them. The closest station to Highgate is Upper Holloway station, about 0.9 miles south-east. A little further out are Highgate Private Hospital (0.6 miles north-west) and Montfichet's Tower (4.4 miles south-east). Open spaces near Highgate include Darland's Lake and Parkland Walk.
Also near Highgate
Also in Highgate
What happens on the day
The work is kept neat and contained to the joints we’re treating. Expect the work to take a few hours for most snagging lists, longer for a run of plots, and we tell you how long to leave it before we go. In Highgate, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We go through the snagging list or plot schedule and agree the joints to do.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- Each area is checked and left with its cure time.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Related advice
Surface by surface
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and primer used where needed.
Questions from Highgate
Can parking be tricky for a visit in Highgate?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Can you help a landlord with a rental near Upper Holloway station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can I send you my snagging list?
Yes. We often work straight from a snagging list. We’ll go through the sealant items and agree what we’ll do.
Can you match the sealant colour to my new kitchen or bathroom?
We use white, clear or a colour to suit the finishes. Let us know your preference when you ask for a quote.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Can you do several jobs on one visit?
Yes. Just list everything you need and you’ll get one quote.
Do you need new build mastic in Highgate?
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops.
Look out for any of the following:
- Gaps behind new kitchen upstands
- Frame joints opening as the plaster dries
- Skirting joints opening in the first winter
- Shower seals failing in the first year or two
If you’ve bought a new home near Upper Holloway station, the sealant around baths, showers and frames is worth checking in the first year or two.
What to look for in a quote
- Who turns up on the day
- Is VAT in the price?
- Whether the sealant suits the joint
- What the cure time is
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Why act early in Highgate
Sealant done properly at handover means fewer callbacks. Every return visit for a failed seal takes time, and they’re avoidable with good preparation. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Highgate, the repair is bigger than the sealant job would have been.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
Why book with us
- Anti-fungal silicone where joints get wet
- More than 20 years in sealant work
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
Take a look at our cost guide and what customers say.