Greater London · England
Walham Green New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Walham Green. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Cracks appearing as a new home settles
- Plot mastic for developers ahead of handover
- Beads laid onto grit and dust from the build
New build mastic for homes and businesses in Walham Green
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. We work on skirting & floors, kitchens and show homes, and the jobs we see most are gaps opening as the house dries out and settles and internal frame sealant that has split.
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.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Place
- Walham Green (SW6, SW10, SW11)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Walham Green
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Resealing promptly protects the new finishes around it. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins, so you know where you stand.
Why book with us
- Quality sealants from Arbo and Everbuild
- Tidy, careful work
- A choice of colours where the product allows
- 20+ years of sealant experience
Read our cost guide and customer reviews.
Towns and villages near Walham Green
More services for Walham Green
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and clear up. It usually takes a few hours for most snagging lists, longer for a run of plots. For a job in Walham Green, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Related advice
Landlord and commercial work in Walham Green
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
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.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Avoid running a DIY bead over the old one
- Get a leaking seal dealt with right away
- Check bath and shower seals every few months as the house settles
- Wait for the cure time before using a resealed shower
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers so moisture doesn’t sit on the sealant.
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
Jobs vary more than people expect. The main factors:
- How easy the joints are to reach
- The old material and how stubborn it is
- The size of the job
- The product the joint needs
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Helping us quote
When you contact us, these details help:
- Where the property is
- Pictures of the joints, sent by email
- What’s wrong with the joints now
- Any access issues, like height or stairs
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Walham Green: your questions answered
Can you help a landlord with a rental near Imperial Wharf station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is parking a problem for a job in Walham Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do plot mastic on a new development?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send the schedule and any specification and we will give you a quote.
How long does the job take?
That depends on the amount of work, but most jobs take a few hours for most snagging lists, longer for a run of plots. We will give you a better idea when we quote.
Will you just run a new bead over the existing one?
No. We always remove the existing bead, then clean and prime the joint, and a new bead applied.
Do you use white or clear sealant?
That depends on what the joint meets: white or clear for most sanitary joints, colours for worktops, floors and frames. We agree the colour before work begins.
Is there a guarantee?
Yes. Every job comes with our 12-month guarantee.
How much does new build mastic cost in Walham Green?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
New build mastic around Walham Green
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Imperial Wharf station, the sealant around baths, showers and frames is worth checking in the first year or two. As a London address, Walham Green can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Walham Green is about 2 miles south of Kensington, in Greater London. Walham Green gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, and Walham Green is one of them.
We work across SW6, SW10 and SW11 for new build mastic. We cover properties on Farm Lane, Lots Road and Epple Road. Walham Green sits on or near the A304. We also cover the places around Walham Green: Chelsea Harbour (1 mile south-east), Parsons Green (1 mile south-west), World's End (1 mile north-east), Sands End (1 mile south-east) and West Brompton (1 mile north). Within a short drive, we also cover London (4 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Local landmarks in Walham Green
Locally, jobs take us to homes and businesses close to Natural History Museum Library and Archives, Heatherley School of Fine Art and Langford Primary School and the streets around them. Other local landmarks include William Parnell Park (under half a mile south) and The Rose pub (less than half a mile south-east). Walham Green has its own railway station: Imperial Wharf station. Other landmarks nearby include Chelsea Stadium Tour And Museum (less than half a mile north) and Chelsea and Westminster Hospital (0.5 miles north-east). The countryside around Walham Green includes Battersea Park Lake and WWT London Wetland Centre.
How the job changes by surface
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed so the sealant lasts.
Show homes
Show homes need sealant that looks right from day one. We lay neat, even beads in colours to suit the finishes.