Greater London · England
New Build Mastic in Kew
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Kew and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Sealant work across a run of new homes
- Untidy sealant flagged on a snagging list
- Cracked caulk along new skirting
Why deal with it now?
For developers, getting the sealant right first time saves return visits. Every return visit for a failed seal takes time, and they’re avoidable with good preparation. In a flat in Kew, 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.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
Why Kew clients choose us
- We are fully insured
- Sealant colour chosen to suit
- Experience in homes, commercial sites and hotels
- Tidy, careful work
Read our cost guide and our reviews.
New build mastic in Kew
Snagging sealant properly means taking the failed bead out completely. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. Typical jobs include messy sealant that spoils new finishes and cracked caulk along new skirting, across kitchens, skirting & floors and windows & doors.
London homes range from new-build flats to period conversions with new floors laid over old boards. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement, in Kew as anywhere.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Kew (W4, TW9, TW8)
- Region
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Kew
Also in Kew
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Don’t wait for the house to settle if water is getting through
- Record problems with dated pictures
- Check bath and shower seals every few months as the house settles
- Follow the cure time we give you
Keep photos of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black saves a harder job later.
What new build mastic looks like in Kew
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Chiswick station, it’s worth checking the sealant early, while snags are still fresh.
Kew is about 2 miles south of Acton, in Greater London. We carry out new build mastic for homes and businesses in Kew, as part of our work across Greater London. Across Greater London, we cover 764 places, and Kew is one of them. We also work in London, around 8 miles away.
Every address in W4, TW9 and TW8 is covered for new build mastic. You will find streets such as Kew Road, Maze Road and Kent Road, and we cover them all. You’ll find Kew on the A3000, which makes it straightforward to reach with everything needed for new build mastic. If you’re just outside Kew, we cover Strand-on-the-Green (1 mile north), Grove Park (1 mile east), North Sheen (1 mile south), Gunnersbury (1 mile north) and Turnham Green (1 mile east). Larger places within reach include London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles north-east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).
What’s near Kew
In Kew, that means homes and buildings near Library for Iranian Studies, Kew Green and Chiswick School and the streets around them. Also close by are Kew College Prep (under half a mile south-west) and Bull's Head pub (under half a mile north). Kew’s nearest station is Chiswick station, roughly 0.5 miles south-east. Well-known places in the area include Livat Hammersmith (2.2 miles east) and Barnes Hospital (1.5 miles south-east). The countryside around Kew includes Kew Gardens Lake and Duke's Hollow.
Landlords, agents and businesses in Kew
Letting agents and landlords in Kew can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
When it is not the sealant
Sealant isn’t the answer to every problem, and we will tell you before work begins. It won’t solve:
- Structural cracks in walls or ceilings
- Disputes or warranty claims with your builder
- Plumbing faults behind the sealant
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Plot handovers
- Skirting & floors
- Kitchens
- Windows & doors
- Bathrooms & en suites
- Show homes
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes a few hours for most snagging lists, longer for a run of plots in most cases. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Kew. It helps if you can point us to a visitor permit or a bay close to the door.
- We go through the snagging list or plot schedule and agree the joints to do.
- Failed or untidy sealant is cut out completely.
- 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.
Before we arrive
- Clear items away from the joints we’re working on
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We will give you a clear quote before any work starts.
Related advice
FAQs for Kew
I let a flat near Chiswick station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Is parking an issue for new build mastic in Kew?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
Can I send you my snagging list?
Yes. Send the list and a few pictures of the sealant items and we will give you a quote. We’ll tell you if anything on it is not a sealant job.
Can you match the sealant colour to my new kitchen or bathroom?
Most bathroom joints are white or clear, but other colours are available. We match the colour to the finish and agree it with you.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few photos.
Will you just run a new bead over the existing one?
No. New silicone won’t bond to old silicone, so it soon lifts and traps water. The old sealant always comes out first.
Common problems we fix in Kew
The wrong product is sometimes used in the wrong place: caulk where water collects, or a rigid product on a moving joint. Neither lasts long.
If you can see any of these, it’s time to have the joints looked at:
- Sealant work across a run of new homes
- Gaps between new skirting and floors
- Sealant that never bonded to the surface
- Leaking shower tray seals in a new home
Kew is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What to look for in a quote
- Whether all the old sealant comes out first
- Whether the sealant suits the joint
- What preparation is included
- What the cure time is
Can I do it myself?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.