Greater London · England
Sand Mastic in Norbiton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Norbiton, backed by a one-year guarantee. Ask us for a quote.
- Open joints round the window box
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Keep sills and gutters clear so water drains away
- Check the mastic when you check the paintwork
- Avoid heavy scraping on the mastic joint
- Find out about consent before window work on a listed home
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
Sand mastic for homes and businesses in Norbiton
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on period & listed homes, timber door frames and sash and case windows, and people most often call us about mastic worn away on windows facing the weather and gaps between timber frames and stone or brick.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Norbiton as anywhere.
A one-year guarantee comes as standard.
- Where
- Norbiton (KT2, KT1, KT3)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Norbiton
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
Any of these means the joints need attention:
- Mastic worn away on windows facing the weather
- Cement or filler used on old window joints that has cracked
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
If you let a flat or house near Norbiton station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Before booking anyone
- When the joint can take water or movement
- How the colour is chosen
- Whether all the old sealant comes out first
- How the surfaces are prepared before sealing
DIY versus a professional finish
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, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
How it works
Before we leave, we go over the finished joints with you. The work normally takes anything from a few hours to a full day, depending on how many windows, depending on the size of the job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Norbiton. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Tell us about any water getting in
- Try not to wet indoor joints just before the visit
- Clear the area around the work
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or email us.
Advice
Sand mastic in Norbiton: local notes
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as St Paul's CofE Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. As a London address, Norbiton can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Norbiton is about 3 miles west of Wimbledon, in Greater London. We carry out sand mastic for householders, landlords and businesses in Norbiton and nearby. 764 places in Greater London are on our list. Our London page covers work nearby, about 10 miles away.
Our applicators cover all of KT2, KT1 and KT3 for sand mastic and the streets around it. Sand mastic is available to properties on New Road, York Road and Orme Road. If you’re just outside Norbiton, we cover Kingston upon Thames (1 mile west), Coombe (1 mile north-east), New Malden (1 mile south-east), Motspur Park (1 mile east) and Coombe Hill (2 miles north-east). Within a short drive, we also cover London (10 miles north-east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north-east), St Pancras (11 miles north-east) and Shoreditch (12 miles north-east).
Near you in Norbiton
Typical jobs here are in homes near Kingston Grammar School, Tiffin School and The Black Horse pub. There’s a railway station in Norbiton itself: Norbiton station. Nearby you’ll also find Kingston Hospital (less than half a mile north) and Bentall Centre (0.9 miles west). Green spaces nearby include Rose Walk and Kingston Hill Road area.
Norbiton: your questions answered
Is parking an issue for sand mastic in Norbiton?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you work for landlords with property near Norbiton station?
Yes. We work for letting agents and landlords as well as householders. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Where do you work from?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Why it’s worth doing now in Norbiton
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic suits the building and blends with the stone or brick. 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.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Why us?
- Rated 4.9 stars on Google
- Tidy, careful work
- Anti-fungal silicone where joints get wet
- Quality sealants from Arbo and Everbuild
Nearby places to Norbiton
What else we do in Norbiton
How the job changes by surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Landlords, agents and businesses in Norbiton
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
For anyone letting property in or around Norbiton, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.