Greater London · England
North Kensington Sand Mastic
We cover North Kensington for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Gaps round a timber door in stone or brick
- Draughty sash windows at the surround
- Modern sealant on a period surround
Questions from North Kensington
I let a flat near Kensal Green station. Can you help?
Yes, we work for landlords and agents. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is parking an issue for sand mastic in North Kensington?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
What should I tell you?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
How do I get a quote for sand mastic in North Kensington?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Is it OK to seal over old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
How we handle sand mastic in North Kensington
Sand mastic suits most period window surrounds. Newer frames generally get a flexible sealant instead, and we’ll talk through which suits your home. We are often asked to deal with window mastic to renew ahead of painting and a silicone bead on a sash window that spoils the look, across stone surrounds, period & listed homes and timber door frames.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- North Kensington (W10, NW10, W11)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work cannot fix
In fairness, some problems need a different trade:
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
- Cracked or broken glass
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
- Sash and case windows
Why deal with it now?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler for homes in North Kensington.
Combining jobs into one visit is usually more efficient than separate visits. You will get one clear quote for the whole job.
Why North Kensington clients choose us
- 12-month guarantee on every job
- 4.9 on Google from 180+ five-star reviews
- Old sealant always removed completely
- ARBOMaster approved applicator
See our cost guide and our reviews.
Surface by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Places near North Kensington
Other services in North Kensington
The process
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours per window, depending on the condition of the joints for a typical job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in North Kensington. It helps if you can point us to a visitor permit or a bay close to the door.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Tell us if parking is tricky
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Read more
What affects the cost of sand mastic
Call for a quick quote. What matters most is:
- The type of sealant required
- Access and height
- The amount of work
- The old material and how stubborn it is
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Asking for a quote
To help us quote quickly, let us know:
- Where the job is, and your postcode
- Whether it’s a home or a business
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
Should I try it myself first?
The difference is mostly in the preparation and the 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.
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.
Work for landlords, hotels and businesses
Landlords and agents in North Kensington can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
For anyone letting property in or around North Kensington, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Frames and glazing around North Kensington
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
North Kensington is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as Barlby Primary School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Dissenters' Chapel, the joint between an old wall and a newer frame is usually the first place rain gets in.
North Kensington is about 2 miles north-west of Kensington, in Greater London. Across the W10 area, our applicators can take on sand mastic. We cover 764 towns and villages across Greater London, from the larger towns to small villages. London is on our list too, around 6 miles away.
Here we cover the W10, NW10 and W11 postcode area for sand mastic. Streets in the area include Peach Road, Barlby Road and Eynham Road, and we cover them all. Close by, we work in Kensal Town (1 mile east), Kensal Green (1 mile north-west), Kensal Rise (1 mile north), Notting Dale (1 mile south-east) and White City (1 mile south). Within a short drive, we also cover London (6 miles east), City of Westminster (3 miles east), Marylebone (3 miles east), St Pancras (4 miles east), Shoreditch (6 miles east) and Walthamstow (9 miles north-east).
Around North Kensington
Typical jobs here are in homes near Little Wormwood Scrubs, Maida Vale School and The Eagle pub. For rail, the closest station is Kensal Green station, about 0.5 miles north. Well-known places in the area include Princess Louise Hospital (within half a mile south-west) and Culture House (1.3 miles south). Open spaces near North Kensington include Campden Hill and Greville Place nature reserve.