Kent · England
Sand mastic for sash & case windows in Langley, Kent
Professional sand mastic in and around Langley, with old sealant always removed completely.
- Modern sealant on a period surround
- Weathered mastic on the most exposed windows
- Gaps between timber frames and stone or brick
How it works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a single window, longer for several. Somewhere as small as Langley, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
- Clear items away from the joints we are working on
Getting a quote
For sand mastic in Langley, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
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Sand mastic for homes and businesses in Langley
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditionally, sand mastic is left unpainted and we will advise if you’re redecorating. We work on brick reveals, timber door frames and period & listed homes, and common reasons people get in touch are wind and rain getting in round a sash window and gaps between timber frames and stone or brick.
Homes in small places like Langley often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Every job is covered by a 12-month guarantee, wherever you are in Kent.
- Where
- Langley (ME17, ME15)
- Region
- Kent
- Cover
- A year, on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Langley
More services for Langley
What the job involves on each surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Honest limits
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Tenement windows
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Brick reveals
- Timber door frames
Can I do it myself?
Sealing over old silicone is the commonest DIY error. 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.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Langley questions
Is Langley within the area you cover?
Yes. Langley is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Bearsted station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or drop us an email.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
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 with a short description of the job.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Are you insured?
Yes, we’re fully insured for every job we do.
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- The number of rooms or windows
- Any mould that needs treating
- How easy the joints are to reach
- Any working-time requirements on site
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and agree the price before starting.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- Where the property is
- Any access issues, like height or stairs
- What’s wrong with the joints now
- If someone has resealed it before
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.
Do you need sand mastic in Langley?
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
It’s worth asking for a quote if you see:
- Tired mastic found when preparing windows for paint
- Cracked mastic round a front door frame
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps where the frame meets the masonry
Rented homes near Bearsted station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- Which sealant they’ll use, and why
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
- When the joint can take water or movement
What sand mastic looks like in Langley
With historic houses such as Stoneacre (about 1.1 miles north) nearby, there’s older building stock in the area around Langley as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Langley Park Primary Academy, its window and door frames need their mastic kept sound, just like a home’s.
Langley is about 3 miles south-east of Maidstone, in Kent. Every kind of property in Langley is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Across Kent, we cover 922 places, and Langley is one of them. Our London page covers work nearby.
Every address in ME17 and ME15 is covered for sand mastic, from the main roads to the quietest streets. Whether your property is on Heath Road, Green Lane and Sutton Road or anywhere close by, we can help. We also cover Langley Heath (1 mile east), Five Wents (1 mile south-east), Warmlake (1 mile south), Otham (1 mile north-west) and Chart Sutton (1 mile south-west). Within a short drive, we also cover Maidstone (3 miles north-west), Ashford (14 miles south-east), Sittingbourne (10 miles north-east), Royal Tunbridge Wells (15 miles south-west), Tonbridge (14 miles west) and Faversham (14 miles north-east).
Around Langley
Around Langley, our work takes us to homes and buildings near New Line Learning Academy, The Potting Shed pub and Senacre Technology College and the streets around them. For rail, the closest station is Bearsted station, roughly 2.7 miles north of the centre. Well-known places in the area include KIMS hospital (3.6 miles north) and Sutton Valence Castle (1.8 miles south). Green spaces nearby include Detling Hill.