Greater London · England
New-build mastic & snagging in Kensal Green, Greater London
Professional new build mastic in and around Kensal Green, with old sealant always removed completely and a 12-month guarantee.
- Worktop and upstand sealant coming away
- Second-fix sealing on new plots
- Leaking shower tray seals in a new home
DIY sealant or a professional job?
If you’re 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 fails, we can still redo it.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
About our new build mastic in Kensal Green
In a new home, every joint should have a clean, even bead. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water reaches anything behind it. Typical jobs include sealant that never bonded to the surface and cracks appearing as a new home settles, across plot handovers, skirting & floors and windows & doors.
Across London, commercial floors have movement joints that break down under heavy foot traffic, and new homes need their plot mastic finished properly before handover, in Kensal Green and beyond.
All our work is covered by a 12-month guarantee, wherever you are in Greater London.
- Place
- Kensal Green (NW10, W10, NW6)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Follow the cure time we give you
- Resist patching a failed seal with a tube from the DIY shop
- Don’t wait for the house to settle if water is getting through
- Photograph failed sealant before it’s redone
Clean the sealant with a mild detergent and a soft cloth. Keep scourers and harsh chemicals off it as they wear the bead.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
How it works
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for most snagging lists, longer for a run of plots and we leave things clean and tidy. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Kensal Green. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
How to prepare
- Clear the area around the work
- Tell us about any water getting in
- On commercial sites, let us know about site rules
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job.
Related advice
Towns and villages near Kensal Green
What else we do in Kensal Green
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Surface by surface
Skirting and floors
As timber and screed dry, skirting and floors shift. Caulk cracks; a flexible sealant moves with it.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish ready for viewings. We’ll plan around viewing times.
When to call us in Kensal Green
A new house holds a lot of water from the build, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Look out for any of the following:
- Sealant work across a run of new homes
- Sealant applied over dusty or wet surfaces
- Gaps between new skirting and floors
- Shower seals failing in the first year or two
If you’ve bought a new home near Kensal Green station, the sealant around baths, showers and frames is worth checking in the first year or two.
What your quote should include
- When the joint can take water or movement
- What product goes in the joint
- Who turns up on the day
- How the surfaces are prepared before sealing
What affects the quote in Kensal Green
For a quick quote, just ask. What matters most is:
- The product the joint needs
- Whether the work is at height
- Whether there’s mould to deal with
- The amount of work
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or send us an email and we will talk you through it.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- The problem you’ve noticed
- The type of property
Need a quote? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Kensal Green questions
Can you help a landlord with a rental near Kensal Green station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Is parking an issue for new build mastic in Kensal Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you work for developers?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send the schedule and any specification and we will give you a quote.
Do you have insurance?
Yes. We’re fully insured.
Can I send you my snagging list?
Yes. Snagging lists are a common starting point for us. We will go through the sealant items and agree what we will do.
How do I get a quote for new build mastic in Kensal Green?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, large or small.
What new build mastic looks like in Kensal Green
Much of London’s new housing is flats in larger 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.
As a London address, Kensal Green can be tricky for parking: let us know about parking bays, permits or a driveway.
Kensal Green is about 1 mile south-west of Kilburn, in Greater London. If you need new build mastic in Kensal Green, please phone 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base, Kensal Green included. 764 places in Greater London are on our list. For nearby work, see our London page.
Jobs for new build mastic in NW10, W10 and NW6 is quoted and booked the same way as anywhere else. Whether your property is on Waldo Road, Hazel Road and Hiley Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out new build mastic in Kensal Rise (1 mile east), College Park (1 mile west), North Kensington (1 mile south-east), Willesden Green (1 mile north) and Kensal Town (1 mile south-east). Further out, we also cover London (6 miles east), City of Westminster (3 miles east), Marylebone (3 miles east), St Pancras (5 miles east), Shoreditch (6 miles east) and Walthamstow (9 miles north-east).
Around Kensal Green
We work in homes and buildings around Little Wormwood Scrubs, Queens Park Community School and The Masons Arms and the streets around them. Kensal Green has its own railway station: Kensal Green station. Other landmarks nearby include Westfield London (1.6 miles south) and Princess Louise Hospital (0.7 miles south). For a walk, there’s Greville Place nature reserve and The Long Water.