Greater London · England
New Build Mastic in Canonbury
Professional new build mastic in and around Canonbury, with every bit of old sealant taken out first.
- Gaps opening as the house dries out and settles
- Cracked caulk along new skirting
- Sealant that never bonded to the surface
What happens on the day
You don’t need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours in a single home for a typical job. For a job in Canonbury, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Keep children and pets away from the work area
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
Read more
New build mastic for homes and businesses in Canonbury
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first, and if it isn’t put right, get in touch with us. Common call-outs are for worktop and upstand sealant coming away and joints pulling apart as timber shrinks, on plot handovers, skirting & floors and windows & doors.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement, in Canonbury as anywhere.
Your job is guaranteed for a year, as with all our work.
- Where
- Canonbury (N1, N1P, E8)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Places near Canonbury
Also in Canonbury
Your questions about new build mastic in Canonbury
Do you work for landlords with property near Canonbury station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Can parking be tricky for a visit in Canonbury?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
When is the best time to reseal in a new build?
For failed seals that let water through, the best time is now. Cosmetic gaps can wait until the first year or two of movement has passed.
Should I go to my builder first?
Start with the builder if you are in the snagging or warranty period. Once that is done, or if they will not put it right, we will cut it out and reseal it.
Where are you based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you work for developers?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send the schedule and any specification and we’ll give you a quote.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Different surfaces, different methods
Plot handovers
Plot mastic is carried out to the developer’s schedule. Joints are prepared properly before sealing.
Windows and doors
On new builds, external frame sealant can be patchy. It’s resealed with an exterior sealant suited to the frame and wall.
Why act early in Canonbury
For developers, getting the sealant right first time saves return visits. Every return visit for a failed seal takes time and most come down to preparation. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Canonbury.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What you get with us
- Old sealant always removed completely
- A 12-month guarantee on all work
- 180+ five-star Google reviews
- We agree the colour with you first
Read what affects the cost or customer reviews.
Quotes for new build mastic in Canonbury
We quote each job individually. These are the things that affect it:
- Any working-time requirements on site
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- The type of sealant required
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us and we will talk you through it.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Roughly how big the job is
- What’s wrong with the joints now
- Any previous sealing or DIY work
- Photos by email, if that’s easy
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job and send photos if you have them.
What sealant work cannot fix
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Cracked trays, tiles or worktops
- Cracking that points to a structural problem
- Leaks from pipes, valves or wastes, which need a plumber
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Where we work in Canonbury
- Plot handovers
- Kitchens
- Skirting & floors
- Windows & doors
- Bathrooms & en suites
- Show homes
Common problems we fix in Canonbury
Fresh sealant can be knocked or cut by trades finishing off. If it’s disturbed before curing, the joint can be left weak.
Common reasons people contact us are:
- Messy sealant that spoils new finishes
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
- Gaps opening as the house dries out and settles
If you’ve bought a new home near Canonbury station, the sealant around baths, showers and frames is worth checking in the first year or two.
What to look for in a quote
- Whether the sealant suits the joint
- Who turns up on the day
- Whether VAT is included
- Whether they seal over old material or remove it
New build mastic in Canonbury: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
Canonbury is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Canonbury is about 2 miles north-east of St Pancras, in Greater London. Across the N1 area, our applicators can take on new build mastic. Across Greater London, we cover 764 places, and Canonbury is one of them.
All of N1, N1P and E8 is covered for new build mastic, from the main roads to the quietest streets. That includes homes and businesses on Dove Road, Essex Road and Clare Lane and the roads around them. Canonbury is on the A1199 and A1200, so it’s easy for us to get to with everything needed for new build mastic. Neighbouring places we cover for new build mastic include De Beauvoir Town (1 mile east), Mildmay (1 mile north-east), Kingsland (1 mile east), Newington Green (1 mile north) and Highbury (1 mile north-west). We also work in nearby towns such as London (3 miles south), City of Westminster (3 miles south-west), Marylebone (3 miles south-west), Kensington (6 miles south-west), Walthamstow (4 miles north-east) and Hampstead (4 miles west).
Landmarks near Canonbury
Typical jobs here are in homes near Bishopsgate Institute Special Collections and Archives, City of London Academy Highbury Grove and Islington Green School, among other places. Also close by are New Crown pub (under half a mile north-west) and Shoreditch Park (0.6 miles south). There’s a railway station in Canonbury itself: Canonbury station. Nearby you’ll also find Montfichet's Tower (2.2 miles south) and Clowns Gallery-Museum (0.7 miles east). The countryside around Canonbury includes St. James's Park Lake and Ludgate Hill.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.