Greater London · England
New-build mastic & snagging in North End, Greater London
Problem with your new-build sealant joints in North End? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Smeared, uneven beads picked up at snagging
- Gaps opening as the house dries out and settles
- Worktop and upstand sealant coming away
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours in a single home. In North End, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
How to get a quote
If you are in North End and need new build mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Related advice
How we handle new build mastic in North End
A new build should have a neat, sound bead at every joint. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water reaches anything behind it. If you are dealing with beads laid onto grit and dust from the build and new-build shower sealant that has already split, we can put it right, whatever the surface.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Every joint between floor, skirting and threshold has to cope with some movement.
Each job carries a 12-month guarantee, whatever its size.
- Place
- North End (NW3, NW11, N2)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to North End
What else we do in North End
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
For anyone letting property in or around North End, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Surface by surface
Skirting and floors
Floors and skirting move as the house dries and the heating runs. Caulk cracks; a flexible sealant moves with it in a colour to suit.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Quotes for new build mastic in North End
For a quick quote, just ask. What matters most is:
- How easy the joints are to reach
- Which sealant suits the joint
- When we can work, for business premises
- The number and length of the joints
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- How we’d reach the joints
- Whether it has been sealed before
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
New homes and floors in North End
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Hampstead Heath station, the sealant around baths, showers and frames is worth checking in the first year or two. North End is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
North End is about 1 mile north of Greenhill, in Greater London. We provide new build mastic to homeowners, landlords and businesses in North End and nearby. North End is one of 764 towns and villages in Greater London where we work. London is on our list too, around 6 miles away.
Every address in NW3, NW11 and N2 is within our area for new build mastic, from the main roads to the quietest streets. If you need new build mastic at a property on Sandy Road, Park Avenue and Platt's Lane or a nearby road, we can help. You’ll find North End on the A502, so it’s easy for us to get to. Close by, we work in Vale of Health (1 mile south-east), Childs Hill (1 mile south-west), Golders Green (1 mile north-west), Greenhill (1 mile south) and West Hampstead (1 mile south). Within a short drive, we also cover London (6 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south-east), Kensington (5 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles south-east).
Around North End
Around North End, our work takes us to homes and buildings near The Old Bull and Bush pub, Childs Hill Park and The Henrietta Barnett School. For rail, the closest station is Hampstead Heath station, roughly 1.1 miles south-east of the centre. Other landmarks nearby include O2 Centre (1.4 miles south) and New End Hospital (0.7 miles south). For a walk, there’s Turner's Wood and Darland's Lake.
Why it’s worth doing now in North End
A tube of sealant from the DIY shop will not fix the cause: dust, no primer and old sealant left in the joint. Proper removal and preparation are what make it last. 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. Dealing with it early is far simpler for homes in North End.
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 North End customers choose us
- 180+ five-star Google reviews
- Approved under the ARBOMaster scheme
- Tidy, careful work
- Quality sealants from Arbo and Everbuild
Read our cost guide or our reviews.
Questions from North End
Is parking a problem for a job in North End?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Do you cover North End for new build mastic?
Yes. We work across London and the South East, and North End is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Do you do commercial work?
Yes. We can plan bigger jobs in stages.
Can new sealant go on top of the old bead?
No. Over-sealing traps mould and water and soon fails. We remove every bit of the old bead before resealing.
How much does new build mastic cost in North End?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
When something else is needed
Sealant is not the answer to every problem, and we’d rather say so up front. It won’t solve:
- Movement caused by a poorly fitted tray or bath
- Your warranty claim itself, which is between you and the builder
- Cracking that points to a structural problem
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in North End
- Windows & doors
- Plot handovers
- Bathrooms & en suites
- Show homes
- Skirting & floors
- Kitchens
How to look after the new joints
After the cure time, these simple habits help:
- Wipe joints with warm soapy water
- Record problems with dated photos
- Act quickly if a seal starts to leak
- Put sealant faults on your snagging list early
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry, and they’re simple to reseal once movement has slowed.
Mould takes hold quickly in sealant that has gaps or lifted edges. Dealing with it before it goes black keeps the job straightforward.