Greater London · England
New-build mastic & snagging in Chalk Farm, Greater London
Plot mastic for developers and snagging failed sealant in new homes for householders, landlords and businesses in Chalk Farm. Fully insured, ARBOMaster approved and guaranteed for a year.
- Shower seals failing in the first year or two
- Kitchen sealant that has pulled off the wall
- Gaps between new skirting and floors
New build mastic for homes and businesses in Chalk Farm
We work in new homes and on new-build sites across Chalk Farm. Whether it’s one en suite or a run of plots, the method is the same: remove, clean, prime where needed, then a neat new bead. If you have cracked sealant around new window and door frames and messy sealant that spoils new finishes, we can put it right, on plot handovers, windows & doors and skirting & floors alike.
New flats are going up across London, many of them in larger developments. In a new development, snags are often reported through the developer or the managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Location
- Chalk Farm (NW5, NW1, NW3)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Leaks from pipes, valves or wastes, which need a plumber
- Movement caused by a poorly fitted tray or bath
- Cracking that points to a structural problem
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Show homes
- Kitchens
- Bathrooms & en suites
- Plot handovers
- Windows & doors
- Skirting & floors
Leave it or put it right?
A failed shower or bath seal in a new home lets water into floors and walls that are still drying out. Dealing with it early keeps the damage away from ceilings, floors and finishes. 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 Chalk Farm, the repair is bigger than the sealant job would have been.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What you get with us
- Experience in homes, commercial sites and hotels
- A sealant colour to suit the surroundings
- We never seal over old sealant
- Anti-fungal sanitary silicone in wet areas
Questions from Chalk Farm
Can you help a landlord with a rental near Kentish Town West station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is parking a problem for a job in Chalk Farm?
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.
How long will you be here?
Typically it takes a few hours in a single home. Bigger jobs take longer, and we will say how long yours will take.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months.
Can you do plot mastic on a new development?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send us the plot schedule and we’ll quote.
Will you just run a new bead over the existing one?
No. Fresh silicone does not stick to the old layer, so it soon lifts and traps water. The old sealant always comes out first.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you need new build mastic in Chalk Farm?
Sealant applied onto damp surfaces does not bond well. On a busy site, joints are not always given time to dry.
Look out for these signs:
- Cracked caulk along new skirting
- Shower seals failing in the first year or two
- Cracks appearing as a new home settles
- Kitchen sealant that has pulled off the wall
If you’ve bought a new home near Kentish Town West station, the sealant around baths, showers and frames is worth checking in the first year or two.
Questions to ask before you book
- How the colour is chosen
- How long the guarantee is
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
How the visit works
There’s no need to move everything out, 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. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
How to prepare
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
Getting a quote
For new build mastic in Chalk Farm, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
Towns and villages near Chalk Farm
Also in Chalk Farm
New build mastic around Chalk Farm
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Chalk Farm is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Chalk Farm is about 1 mile south-east of Hampstead, in Greater London. Our applicators cover new build mastic for homes and businesses in Chalk Farm and the surrounding area. Our Greater London coverage runs to 764 places, and Chalk Farm is one of them.
Work in NW5, NW1 and NW3 works the same way as everywhere else we cover. You’ll find streets such as Eton Road, Oval Road and Regal Lane. Chalk Farm sits on or near the A5205, which makes travel easy. If you’re just outside Chalk Farm, we cover Kentish Town (1 mile east), Primrose Hill (1 mile south-west), Haverstock (1 mile west), Belsize Park (1 mile west) and Camden Town (1 mile south-east). Within a short drive, we also cover London (4 miles south-east), Kensington (4 miles south-west), Shoreditch (3 miles east), Walthamstow (6 miles north-east), Hoxton (3 miles east) and Whitechapel (4 miles south-east).
What’s near Chalk Farm
Around Chalk Farm, our work takes us to homes and buildings near Primrose Hill, Cecil Sharp House and The Fiddlers Elbow Public House. You’ll also find Holy Trinity and Saint Silas CofE Primary School (less than half a mile east) and North Bridge House School (0.5 miles south-east). Chalk Farm has its own railway station: Kentish Town West station. A little further out are Isokon Gallery (0.7 miles north-west) and O2 Centre (1.3 miles west). Not far away are Primrose Hill and The Long Water.
What affects the cost of new build mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- Access and height
- When we can work, for business premises
- The number and length of the joints
- How many areas need sealing
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What to tell us for a quote
When you contact us, it’s useful to know:
- How we’d reach the joints
- Where the job is, and your postcode
- Whether it’s a home or a business
- If someone has resealed it before
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll take it from there.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Clean sealant with mild detergent, not abrasives
- Avoid running a DIY bead over the old one
- Act quickly if a seal starts to leak
- Check bath and shower seals every few months as the house settles
Keep pictures of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small and the new finishes intact.
Different surfaces, different methods
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it painted or coloured to suit.