Greater London · England
New Build Mastic in Childs Hill
New build mastic for Childs Hill and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Gaps behind new kitchen upstands
- Beads laid onto grit and dust from the build
- New-build shower sealant that has already split
New build mastic in Childs Hill: 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. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
Childs Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Childs Hill is about 1 mile north-west of West Hampstead, in Greater London. We carry out new build mastic for homeowners, landlords and businesses in Childs Hill, as part of our work across Greater London. We cover 764 towns and villages across Greater London, large and small. Our London page covers work nearby (6 miles or so).
Jobs for new build mastic in NW2, NW3 and NW11 is quoted and booked the same way as anywhere else. Local streets include Nant Road, Ridge Road and Garth Road, all of which we cover. Close by, we work in Fortune Green (1 mile south), West Hampstead (1 mile south-east), Golders Green (1 mile north), North End (1 mile north-east) and Vale of Health (1 mile east). We also work in nearby towns such as London (6 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (4 miles south-east) and Shoreditch (6 miles south-east).
Landmarks near Childs Hill
Around Childs Hill, our work takes us to homes and buildings near St Vedasts School For Boys, Hampstead School and The Old Bull and Bush pub. The nearest railway station is Cricklewood station, roughly 0.7 miles south-west. Other landmarks nearby include O2 Centre (1.2 miles south-east) and New End Hospital (0.9 miles east). Open spaces near Childs Hill include Parliament Hill and Westbere Copse.
How we handle new build mastic in Childs Hill
We work in new homes and on new-build sites across Childs Hill. 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. We work on show homes, bathrooms & en suites and kitchens, and the jobs we see most are sealant work across a run of new homes and new-build shower sealant that has already split.
New flats are going up across London, many of them in larger developments. Snagging there often goes through the developer or managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
Every job is covered by a 12-month guarantee, wherever you are in Greater London.
- Place
- Childs Hill (NW2, NW3, NW11)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Childs Hill
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Record problems with dated photos
- Wipe joints with warm soapy water
- Don’t wait for the house to settle if water is getting through
- Open a window or run the fan after bathing
Photograph failed sealant before it’s redone and keep the builder’s replies. It helps if anything else comes up during the warranty period.
If a shower tray or bath seal splits in the first year, look for movement. Getting it resealed properly, and any movement checked, stops it recurring.
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The amount of work
- How easy the joints are to reach
- The number of rooms or windows
- When we can work, for business premises
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
What to tell us for a quote
You do not need to know the technical terms. Just tell us:
- If someone has resealed it before
- Any access issues, like height or stairs
- The problem you’ve noticed
- Whether it’s a home or a business
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Childs Hill questions
Can you do new build mastic in Childs Hill?
Yes, Childs Hill is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
I let a flat near Cricklewood station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
How long will you be here?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the number of plots. We’ll give you a better idea when we quote.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Can new sealant go on top of the old bead?
No. Fresh silicone doesn’t stick to the old layer, so sealing over the top fails quickly. The old sealant always comes out first.
Why does sealant fail so quickly in new builds?
It’s common, and there are generally two reasons: movement as the house dries and settles, and sealant laid onto dust without primer. A proper reseal deals with both.
What does new build mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or send us an email and let us know what needs doing and where.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses, and we’re fully insured.
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Signs you need new build mastic in Childs Hill
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly and it shows once the home is in use.
Keep an eye out for these signs:
- Untidy sealant flagged on a snagging list
- Shower seals failing in the first year or two
- Gaps opening as the house dries out and settles
- Worktop and upstand sealant coming away
For new homes near Cricklewood station, it’s worth checking the sealant early, while snags are still fresh.
Before you book anyone
- Whether they’re fully insured
- When the joint can take water or movement
- What preparation is included
- Which sealant they’ll use, and why
The process
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the number of plots. In Childs Hill, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- 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.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Clear items away from the joints we are working on
- Let us know about earlier repairs to the joints
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Read more
Honest limits
We will not take on work that will not last, so here’s what sealant can’t put right:
- Cracking that points to a structural problem
- Baths and trays that move too much for sealant to cope with
- Damaged fittings that need replacing
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Surfaces we seal
- Bathrooms & en suites
- Windows & doors
- Skirting & floors
- Show homes
- Kitchens
- Plot handovers