Surrey · England
Sand Mastic in Longcross
Our applicators work in Longcross 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.
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
- Modern sealant on a period surround
What affects the cost of sand mastic
You’ll get a clear quote before we start. It takes into account:
- How much there is to do
- The type of sealant required
- Access and height
- How much old sealant there is and how hard it is to remove
Combining jobs into one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Asking for a quote
When you call or email, it’s useful to know:
- Any access issues, like height or stairs
- Where the job is, and your postcode
- Photos by email, if that is easy
- If someone has resealed it before
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job.
Sand mastic in Longcross, done properly
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We are often asked to deal with cracked mastic round a front door frame and old cement repairs round a window that have failed, across timber door frames, period & listed homes and stone surrounds.
Around Longcross, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Our work is backed for twelve months, in Longcross and everywhere else we cover.
- Location
- Longcross (KT16)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What else we do in Longcross
How the job changes by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Landlords, agents and businesses in Longcross
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Longcross homes and the weather
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. Historic houses like Botleys Mansion (about 2.3 miles east) are a reminder that the area around Longcross 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.
For landlords with property near Longcross station, any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near Longcross Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Longcross is about 4 miles south-west of Egham, in Surrey. Longcross gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Longcross is one of 395 places in Surrey we cover. For nearby work, see our Reading page (18 miles or so).
We cover every part of KT16 for sand mastic. Whether your property is on Longcross Road, Tanglewood Close and Albury Close or anywhere close by, we can help. If you’re just outside Longcross, we cover Trumps Green (1 mile north-east), Stonehill (1 mile south-east), Lyne (2 miles east), Mimbridge (3 miles south) and Ottershaw (3 miles south-east). We also work in nearby towns such as Guildford (9 miles south), Woking (4 miles south), Camberley (7 miles south-west), Epsom (14 miles east), Farnham (15 miles south-west) and Ewell (14 miles east).
Near you in Longcross
In Longcross, that means homes and buildings near Gracious Pond. Longcross’s nearest station is Longcross station, about 0.6 miles north-west of the centre. A little further out are St. Peter's Hospital (2.6 miles east) and Chobham Museum (2.2 miles south). The countryside around Longcross includes Virginia Water Lake and St Ann's Hill.
What we can’t put right
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Decisions on consent for listed homes
- Sash cords, weights and draught-proofing of the sashes
- Crumbling stone or brickwork round the window
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Where we work in Longcross
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
- Tenement windows
- Stone surrounds
Why deal with it now?
New sash windows are a major, costly change and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. Around Longcross, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- 4.9 on Google from 180+ five-star reviews
- Over 20 years’ experience
- Experience in homes, commercial sites and hotels
- A 12-month guarantee on all work
Take a look at our cost guide and what customers say.
What happens on the day
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. Expect the work to take a few hours per window, depending on the condition of the joints. For a village or hamlet like Longcross, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we are working on
- Let us know if you’ve seen damp or leaks
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Advice
Longcross questions
Will you come out to Longcross?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Longcross station. Can you help?
Yes. We work for landlords and agents as well as homeowners. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you have insurance?
Yes, we are fully insured for every job we do.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
How much does sand mastic cost in Longcross?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or drop us an email and tell us what needs doing and where.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages to suit the site.