Greater London · England
New-build mastic & snagging in Haverstock, Greater London
We cover Haverstock for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Cracked caulk along new skirting
- Sealant applied over dusty or wet surfaces
- Untidy sealant flagged on a snagging list
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
About our new build mastic in Haverstock
We never seal over a failed new-build bead. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. Typical jobs include sealant that never bonded to the surface and joints pulling apart as timber shrinks, on plot handovers, bathrooms & en suites and kitchens.
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, in Haverstock as anywhere.
Whatever the size of the job, you get the same 12-month guarantee.
- Location
- Haverstock (NW3, NW5, NW1)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
Questions from Haverstock
Can parking be tricky for a visit in Haverstock?
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.
Do you cover Haverstock for new build mastic?
Yes. We work across London and the South East, and Haverstock is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you do not need to watch us work.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Can you do plot mastic on a new development?
Yes. We work through plots to your schedule ready for handover. Get in touch with the number of plots and the scope and we’ll quote.
My new home is still under warranty. Should I contact you?
If you are still within the builder’s snagging or warranty period, report it to them first. If they’re slow or the fix doesn’t last, we can help.
What new build mastic looks like in Haverstock
Compared with the north and west, the South East gets less rain, 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 snagging may go through the developer or managing agent.
Haverstock is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you’ve bought a new home near South Hampstead station, the sealant around baths, showers and frames is worth checking in the first year or two.
Haverstock is about 1 mile south-east of Hampstead, in Greater London. Whether you’re in the middle of Haverstock or further out, new build mastic is available for homes and businesses alike. We cover 764 towns and villages across Greater London.
Postcode districts we cover here for new build mastic: NW3, NW5 and NW1. Whether your property is on Eton Road, Lawn Road and Ornan Road or a nearby road, we can help. Neighbouring places we cover for new build mastic include Belsize Park (1 mile north), Primrose Hill (1 mile south), South Hampstead (1 mile west), Swiss Cottage (1 mile west) and Chalk Farm (1 mile east). Further out, we also cover London (4 miles south-east), Kensington (4 miles south-west), Shoreditch (4 miles east), Walthamstow (7 miles north-east), Hoxton (3 miles east) and Whitechapel (4 miles south-east).
Local landmarks in Haverstock
Around Haverstock, our work takes us to homes and buildings near Cecil Sharp House, Primrose Hill and St. Mary's Town and Country School. You will also find St Paul's Church of England Primary School (within half a mile south) and The Washington pub (less than half a mile north). The closest station to Haverstock is South Hampstead station, about 0.7 miles west. A little further out are Wellington Hospital (0.9 miles south-west) and Isokon Gallery (0.5 miles north). Open spaces near Haverstock include Adelaide Nature Reserve and Primrose Hill.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Wipe joints with warm soapy water
- Keep pictures and emails about snagging items
- Put sealant faults on your snagging list early
- Look at the sealant regularly in the first couple of years
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black keeps the job straightforward.
Towns and villages near Haverstock
Other services in Haverstock
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours in a single home. In a London area like Haverstock, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First we work through your snagging list or plot schedule with you.
- The old bead comes out in full, with no layer left behind.
- 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.
- Finally, each room is checked and you’re given the cure time.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
Getting a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved.
Read more
What happens if it’s left?
Small cosmetic gaps can wait for the house to settle, but a leaking seal cannot. If you are unsure which you have, phone 0345 464 0079 or drop us an email with pictures and we’ll give you a straight answer. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Haverstock, the repair is bigger than a sealant job.
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?
- We agree the colour with you first
- 180+ five-star Google reviews
- Arbo and Everbuild products
- Homes, businesses and hotels
Read our cost guide and what customers say.
Quotes for new build mastic in Haverstock
For a quick quote, just ask. The main things that affect it are:
- Working hours on commercial sites
- The size of the job
- Whether there’s mould to deal with
- Whether the work is at height
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
There’s no need for technical detail. Just tell us:
- Photos by email, if that is easy
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- The problem you’ve noticed
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
How the job changes by surface
Show homes
Show homes need sealant that looks right from day one. We lay neat, even beads in colours to suit the finishes.
Kitchens
As a new house dries, worktops and walls shift a little, which opens gaps along the back. We reseal them with a flexible sealant.