Greater London · England
New Build Mastic in Vale of Health
New-build sealant joints in Vale of Health need attention? We remove the old material, prepare the joints and seal them properly.
- Cracked caulk along new skirting
- Shower seals failing in the first year or two
- Untidy sealant flagged on a snagging list
About our new build mastic in Vale of Health
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks instead of bonding to the dust. If you have cracks appearing as a new home settles and cracked sealant around new window and door frames, we can put it right, whatever the surface.
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.
Every job comes with our one-year guarantee.
- Location
- Vale of Health (NW3)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. For a job in Vale of Health, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- New sealant suited to each joint is applied and tooled neatly.
- Each area is checked and left with its cure time.
How to prepare
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details.
Read more
Joints and finishes in Vale of Health homes
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.
For new homes near Hampstead Heath station, it’s worth checking the sealant early, while snags are still fresh.
Vale of Health is about 1 mile north of Greenhill, in Greater London. Every kind of property in Vale of Health can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. 764 places in Greater London are on our list, large and small. We also work in London, about 6 miles from Vale of Health.
Work in NW3 is quoted and booked the same way as anywhere else. You’ll find streets such as Well Road, Cannon Lane and Holford Road, all of which we cover. Vale of Health is on the A502, which makes it straightforward to reach. We also cover North End (1 mile north-west), Greenhill (1 mile south), Hampstead (1 mile south), West Hampstead (1 mile south-west) and Childs Hill (1 mile west). Larger places within reach include London (6 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south), Kensington (4 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles south-east).
Local landmarks in Vale of Health
Around Vale of Health, our work takes us to homes and buildings near St Vedasts School For Boys, South Hampstead High School and Hampstead Heath and the streets around them. For rail, the closest station is Hampstead Heath station, roughly 0.7 miles south-east. Nearby you’ll also find New End Hospital (under half a mile south) and Montfichet's Tower (4.7 miles south-east). For a walk, there’s Parliament Hill and Turner's Wood.
Looking after it afterwards
After the cure time, these simple habits help:
- Ventilate bathrooms well, especially in the first year
- Do not seal over failed sealant yourself
- Follow the cure time we give you
- Check bath and shower seals every few months as the house settles
Ventilation matters in a new home, which is still drying out. Run the fan or open a window after bathing so moisture does not sit on the sealant.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in saves a harder job later.
Quotes for new build mastic in Vale of Health
For a quick quote, just ask. The main things that affect it are:
- Mould in or behind the old joints
- Working hours on commercial sites
- The product the joint needs
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear price for the lot.
Asking for a quote
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- The problem you’ve noticed
- Roughly how big the job is
- Any access issues, like height or stairs
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
What happens if it’s left?
Small cosmetic gaps can wait for the house to settle, but a leaking seal cannot. Not sure whether yours can wait? You can phone 0345 464 0079 or send us an email with a few photos and we’ll give you a straight answer. In a flat in Vale of Health, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
A few things move the cost up or down: 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 you get with us
- Anti-fungal sanitary silicone in wet areas
- We’re fully insured
- Colour picked to suit the job
- Experience in homes, commercial sites and hotels
Take a look at what affects the cost or customer reviews.
When to call us in Vale of Health
New homes are full of moisture from plaster, screed and concrete, and it dries out over the first couple of years. As it does, timber shrinks and joints open and the sealant has to cope with the movement.
These are the problems we’re asked about most:
- Shower seals failing in the first year or two
- Skirting joints opening in the first winter
- Sealant that never bonded to the surface
- Smeared, uneven beads picked up at snagging
As a London address, Vale of Health can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- When the joint can take water or movement
- What happens if the job turns out different
- Is the old sealant removed completely?
- What guarantee comes with the work
When something else is needed
We will always be straight with you, so here’s what sealant cannot fix:
- Plumbing faults behind the sealant
- Cracked trays, tiles or worktops
- Movement caused by a poorly fitted tray or bath
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Skirting & floors
- Show homes
- Kitchens
- Windows & doors
- Bathrooms & en suites
- Plot handovers
Surface by surface
Kitchens
New-kitchen sealant is often applied in a rush. We take it out and reseal neatly, colour-matched where it shows.
Windows and doors
Internal joints between frames and plaster often crack as a new house dries. We cut out the cracked bead and reseal with a flexible sealant that suits the frame.
Vale of Health: your questions answered
Is parking an issue for new build mastic in Vale of Health?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Is Vale of Health in your area for new build mastic?
Yes. We work across London and the South East, and Vale of Health is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Should I wait before resealing?
Any seal that is leaking should be redone straight away. For small cosmetic gaps, waiting until the house has settled can save doing them twice.
Do you have insurance?
Yes. We are fully insured.
What colour sealant will you use?
We use white, clear or a colour to suit the finishes. Let us know your preference when you ask for a quote.