Surrey · England
Ewell Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Ewell and across Surrey. Fully insured, ARBOMaster approved and guaranteed for a year.
- Crumbling sand mastic round a window
- Old cement repairs round a window that have failed
- Window mastic to renew ahead of painting
Sand mastic in Ewell, done properly
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. Renewing it closes the gap and tidies the surround. We are often asked to deal with mastic dropping out of the joint and gaps round a timber door in stone or brick, across timber door frames, brick reveals and stone surrounds.
In a town like Ewell, the windows on the most exposed side of a house take the brunt of the rain, so the mastic there tends to fail first. Checking every frame, not just the obvious one, is time well spent.
Your job is guaranteed for a year, as with all our work.
- Location
- Ewell (KT19, KT17, SM2)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in Ewell
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. In Ewell, as anywhere, most leaks start as a small gap in a joint, and they’re far easier to fix early.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and give you a clear price before work begins.
Why book with us
- More than 20 years in sealant work
- We leave the area clean and tidy
- Sanitary silicone with an anti-fungal additive in wet areas
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost or what customers say.
What we can’t put right
To be straight with you, there are a few things sealant won’t fix:
- Cracked or broken glass
- Decisions on consent for listed homes
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
Where we work in Ewell
- Brick reveals
- Sash and case windows
- Period & listed homes
- Tenement windows
- Timber door frames
- Stone surrounds
Windows and doors in Ewell
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Fitznells Manor (about 0.2 miles south-east) nearby, there’s older building stock in the area around Ewell as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Homes close to St Mary's Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as St Clement's Catholic Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Ewell is about 10 miles south of Kensington, in Surrey. Jobs in Ewell get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Ewell is one of 395 places in Surrey we cover. We also work in London, about 12 miles from Ewell.
Here we cover the KT19, KT17 and SM2 postcode area for sand mastic. Local streets include London Road, High Street and Church Road. Being close to the A24 and A232, Ewell is easy for our applicators to reach for sand mastic. Nearby, we also carry out sand mastic in Stoneleigh (1 mile north-east), Cuddington (1 mile east), Epsom (1 mile south-west), Worcester Park (1 mile north) and North Looe (1 mile south-east). Larger places within reach include Woking (14 miles west), Horley (13 miles south), Redhill (9 miles south-east), Egham (14 miles north-west), Reigate (8 miles south) and Walton-on-Thames (7 miles west). As one of the bigger places in Surrey, Ewell has every kind of property, from flats to offices.
Local landmarks in Ewell
Around Ewell, our work takes us to homes and buildings near Blenheim High School, King William IV Public House and Hogsmill LNR and the streets around them. Ewell has its own railway station: Ewell West station. Nearby you will also find Chessington Castle Hill (1.6 miles west) and St. Ebba's Hospital (0.9 miles west). For a walk, there’s Tolworth Court Farm Fields and The Lake.
Ewell questions
Can you do sand mastic in Ewell?
Yes. We work across London and the South East, and Ewell is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
I let a flat near Ewell West station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
What exactly is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and shaped to suit the surround.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
How long does the job take?
That depends on how much there is to do, but as a guide it takes anything from a few hours to a full day, depending on how many windows. We’ll tell you when we quote.
Do you need sand mastic in Ewell?
Rain on the window surround works into any crack and pushes it out. Exposed elevations normally fail first.
These are the problems we’re asked about most:
- Gaps round a timber door in stone or brick
- Draughty sash windows at the surround
- Mastic worn away on windows facing the weather
- Mastic that needs renewing before redecorating
For landlords with property near Ewell West station, any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- When the joint can take water or movement
- Who turns up on the day
- Whether they seal over old material or remove it
- Whether you can choose the colour
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How the visit works
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours per window, depending on the condition of the joints. For a job in Ewell, we need access to where the work is and somewhere nearby to park. If the job is outside, mention gates, side access and anything above ground floor.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- 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.
Before we arrive
- Mention if the joints have been sealed before
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work.
Read more
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Plan mastic work ahead of painting
- Ask the planning authority about consent for listed or conservation-area homes
- Have rotten timber repaired before new mastic goes in
- Look over the window mastic once a year
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
Towns and villages near Ewell
More services for Ewell
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.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.