Windsor and Maidenhead · England
Sand Mastic in Eton
Our applicators work in Eton on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
Sand mastic in Eton, done properly
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We work on period & listed homes, stone surrounds and sash and case windows, and common reasons people get in touch are failed mastic on an exposed elevation and gaps between timber frames and stone or brick.
Somewhere as small as Eton, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
You get a one-year guarantee, the same in Eton as everywhere else we work.
- Location
- Eton (SL4)
- Wider area
- Windsor and Maidenhead
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Eton
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. Where a wall is exposed, as many are in small places like Eton, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or email us and we’ll talk you through it.
Why Eton clients choose us
- 4.9 on Google from 180+ five-star reviews
- A 12-month guarantee on all work
- Neat joints and a tidy finish
- We’re fully insured
Questions from Eton
Is Eton in your area for sand mastic?
Yes. Our work covers London and the South East, and Eton is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Is Eton within the area you cover?
Yes. Eton is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is sand mastic better than silicone for my windows?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Which products do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Sand mastic in Eton: local notes
Historic houses like Windsor Castle (about 0.7 miles south) are a reminder that the area around Eton has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
Homes close to Church of Saint John the Evangelist include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as Eton Porny CofE First School, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Windsor & Eton Riverside station, any sash windows need sound mastic to keep draughts and rain out.
Eton is about 1 mile north-east of Windsor, in Windsor and Maidenhead. From the centre of Eton to the outskirts, sand mastic is available for homes and businesses alike. Across Windsor and Maidenhead, we cover 57 places, Eton among them. For nearby work, see our Reading page.
Jobs for sand mastic in SL4 is quoted and booked the same way as anywhere else. That includes homes and businesses on High Street, Eton Square and Common Lane. Eton sits on or near the A332 and B3022, which makes travel easy. Neighbouring places we cover for sand mastic include Clewer (1 mile south-west), Eton Wick (1 mile west), Windsor (1 mile south-west), Boveney (2 miles west) and Dedworth (2 miles south-west). Larger places within reach include Maidenhead (6 miles west), Boyn Hill (6 miles west), North Ascot (6 miles south-west), Cookham (7 miles north-west), Furze Platt (6 miles north-west) and Broomhall (7 miles south).
Around Eton
Around Eton, our work takes us to homes and buildings near The Goswells, St George's School and Christopher Hotel, among other places. Eton’s nearest station is Windsor & Eton Riverside station, roughly 0.5 miles south of the centre. A little further out are Museum of Eton Life (under half a mile south) and Windsor Castle (0.7 miles south). For a walk, there’s Taplow Lake and Bray Pit.
What we do, step by step
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. The work usually takes a few hours for a single window, longer for several. Somewhere like Eton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Tell us if parking is tricky
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
Should I try it myself first?
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. Everything old must be removed first.
If you do try it yourself, take your time over the 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.
What affects the quote in Eton
Call for a quick quote. What matters most is:
- The number and length of the joints
- The type of sealant required
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
What it costs depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How we’d reach the joints
- Any previous sealing or DIY work
- The problem you’ve noticed
- The type of property
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Also in Eton
Landlord and commercial work in Eton
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
When it is not the sealant
We’ll always be straight with you, so here’s what new sealant will not do:
- Masonry that needs repairing
- Cracked or broken glass
- Sashes that need overhauling
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Period & listed homes
- Stone surrounds
- Tenement windows
- Timber door frames
- Brick reveals
- Sash and case windows
Different surfaces, different methods
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.