Greater London · England
New Build Mastic in Brockley Hill
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Brockley Hill and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Leaking shower tray seals in a new home
- Cracked caulk along new skirting
- Kitchen sealant that has pulled off the wall
About our new build mastic in Brockley Hill
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a failed shower or bath seal shouldn’t wait. Typical jobs include gaps behind new kitchen upstands and cracked caulk along new skirting, across windows & doors, kitchens and plot handovers.
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.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Brockley Hill (HA7, HA8, WD6)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Look at the sealant regularly in the first couple of years
- Record problems with dated photos
- Open a window or run the fan after bathing
- Avoid running a DIY bead over the old one
Clean the sealant with a mild detergent and a soft cloth. Keep scourers and harsh chemicals off it as they wear the bead.
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.
What the job involves on each surface
Bathrooms and en suites
Shower trays in new homes often move slightly in the first year. We reseal once the old bead is fully out with baths filled first.
Plot handovers
Developers can send the plot schedule and specification for a quote. We seal bathrooms, kitchens, frames and floors to the agreed spec.
Questions from Brockley Hill
Can you do new build mastic in Brockley Hill?
Yes. Our work covers London and the South East, and Brockley Hill is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing.
Do you work for landlords with property near Elstree & Borehamwood station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we are using and why.
Is there a guarantee?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
Can new sealant go on top of the old bead?
No. We always remove the existing bead, then clean and prime the joint, and a new bead applied.
Is it worth resealing while the house is still settling?
Where water is getting through, do not wait. Small gaps that are just cosmetic can be resealed once movement has slowed.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common. Poor preparation at handover adds to it.
What we cannot put right
Sealant is not the answer to every problem, and we will tell you before we start. It will not solve:
- Your warranty claim itself, which is between you and the builder
- Baths and trays that move too much for sealant to cope with
- Cracking that points to a structural problem
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
What we seal
- Bathrooms & en suites
- Kitchens
- Show homes
- Skirting & floors
- Plot handovers
- Windows & doors
How we quote for new build mastic
The price is agreed before any work begins. It takes into account:
- The product the joint needs
- How many areas need sealing
- The old material and how stubborn it is
- Working hours on commercial sites
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
Photos help, but a description is a good start. Please mention:
- The problem you’ve noticed
- Photos by email, if that is easy
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job.
What we do, step by step
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the number of plots, and we explain the cure time before we leave. For a job in Brockley Hill, 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.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- We tool every joint neatly and tell you when each area can be used.
Before we arrive
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
Read more
Common problems we fix in Brockley Hill
Once people move in, baths and trays take weight and bed down. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used.
These are the problems we are asked about most:
- Joints pulling apart as timber shrinks
- Sealant that never bonded to the surface
- Frame joints opening as the plaster dries
- Gaps between new skirting and floors
As a London address, Brockley Hill can be tricky for parking: let us know about parking bays, permits or a driveway.
Comparing quotes
- Whether they’re fully insured
- How the joint is cleaned and prepared
- How much experience the applicator has
- Whether you can choose the colour
New homes and floors in Brockley Hill
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. 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.
For new homes near Elstree & Borehamwood station, it’s worth checking the sealant early, while snags are still fresh.
Brockley Hill is about 1 mile north of Stanmore, in Greater London. From the centre of Brockley Hill to the outskirts, new build mastic is available for homes and businesses alike. We cover 764 towns and villages across Greater London. There’s also a page for London, roughly 13 miles from Brockley Hill.
We cover every part of HA7, HA8 and WD6 for new build mastic. Streets in the area include Wood Lane, Brockley Avenue and Pipers Green Lane. Neighbouring places we cover for new build mastic include Stanmore (1 mile south), Bushey Heath (2 miles west), Belmont (2 miles south-west), Harrow Weald (2 miles south-west) and Bushey (3 miles north-west). We also work in nearby towns such as London (13 miles south-east), City of Westminster (10 miles south-east), Marylebone (10 miles south-east), Kensington (10 miles south-east), St Pancras (11 miles south-east) and Shoreditch (12 miles south-east).
What’s near Brockley Hill
In Brockley Hill, that means homes and buildings near Abercorn Arms Public House, Aylward Primary School and Edgwarebury Park, among other places. The nearest railway station is Elstree & Borehamwood station, roughly 1.8 miles north-east of the centre. Nearby you’ll also find Royal National Orthopaedic Hospital (under half a mile north-west) and Hilfield Castle (2.2 miles north-west). The countryside around Brockley Hill includes Darland's Lake and Edgware Way Grassland.
Why deal with it now?
Resealing everything on a snagging list in one visit is generally simpler than chasing joints one at a time. You get one visit and one clear quote for the lot. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Brockley Hill, the repair is bigger than the sealant job would have been.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
Why us?
- We agree the colour with you first
- We are fully insured
- Arbo and Everbuild products
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced and customer reviews.