Windsor and Maidenhead · England
Sand mastic for sash & case windows in Lake End, Windsor and Maidenhead
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Lake End, backed by a 12-month guarantee. Ask us for a quote.
- Failed mastic on an exposed elevation
- Wind and rain getting in round a sash window
- Mastic round period door frames that has failed
How we handle sand mastic in Lake End
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes where a modern sealant bead would stand out. We work on timber door frames, stone surrounds and sash and case windows, and the jobs we see most are mastic that needs renewing before redecorating and weathered mastic on the most exposed windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Lake End is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
All our work comes with a 12-month guarantee.
- Where
- Lake End (SL4)
- Wider area
- Windsor and Maidenhead
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. Expect the work to take anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. In a small place like Lake End, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
Getting a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Windows and doors in Lake End
With historic houses such as Dorney Court (about 0.6 miles south-west) nearby, there’s older building stock in the area around Lake End as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Burnham station, older sash windows in a rental need their mastic kept sound to keep the weather out. Schools such as Cippenham Infant School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Lake End is about 2 miles west of Slough, in Windsor and Maidenhead. If you need sand mastic in Lake End, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We’re based in Crawley and cover Windsor and Maidenhead, Lake End included. 57 places in Windsor and Maidenhead are on our list. We also work in Reading, around 14 miles away.
Jobs for sand mastic in SL4 works the same way as everywhere else we cover. You’ll find streets such as Lake End Road and Ashford Lane, and we cover them all. Neighbouring places we cover for sand mastic include Dorney (1 mile south-east), Dorney Reach (1 mile west), Huntercombe (1 mile north-east), Cippenham (1 mile east) and Burnham (1 mile north). Larger places within reach include Maidenhead (3 miles west), Windsor (3 miles south-east), Boyn Hill (3 miles west), North Ascot (6 miles south), Cookham (4 miles north-west) and Furze Platt (4 miles north-west).
Landmarks near Lake End
Locally, jobs take us to homes and businesses close to The Pineapple Public House, Haymill Valley and The E-Act Burnham Park Academy, among other places. Lake End’s nearest station is Burnham station, about 1.2 miles north-east. Well-known places in the area include Windsor Castle (3.1 miles south-east) and The History On Wheels Museum (1.6 miles south-east). For a walk, there’s Taplow Lake and Bray Pit.
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
What affects the quote in Lake End
Every job gets its own quote. These are the things that affect it:
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- Working hours on commercial sites
- Access and height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we’ll go through it with you.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any access issues, like height or stairs
- Whether it has been sealed before
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
Lake End: your questions answered
Do you work for landlords with property near Burnham station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Do you cover smaller places like Lake End?
Yes. Lake End is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we’ll talk you through it.
What does sand mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or drop us an email and tell us what needs doing and where.
Is it possible to take out silicone and use sand mastic instead?
Yes. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before resealing.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in.
Towns and villages near Lake End
Also in Lake End
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Do not run silicone over sand mastic
- Ask a joiner to look at soft timber first
- Renew mastic before redecorating the windows
- Clear gutters so water does not pour onto the windows
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Why act early in Lake End
If you are redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Lake End, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or drop us an email.
What you get with us
- Neat joints and a tidy finish
- Every job guaranteed for a year
- 20+ years of sealant experience
- We’re fully insured
See what affects the cost and our reviews.
When to call us in Lake End
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber, and they normally need raking out.
People generally contact us after spotting something like this:
- A silicone bead on a sash window that spoils the look
- Gaps between timber frames and stone or brick
- Cement or filler used on old window joints that has cracked
- Mastic round period door frames that has failed
In the older streets around Church of St James, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- What happens if they find a problem under the old sealant
- What the quote includes, VAT included or not
- Are they insured?
- Who does the work, and how experienced they are
Landlord and commercial work in Lake End
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.