Kent · England
Sand mastic for sash & case windows in Langley Heath, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Langley Heath. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Modern sealant on a period surround
- Open joints round the window box
- Crumbling sand mastic round a window
Do you need sand mastic in Langley Heath?
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
Common reasons people contact us include:
- Mastic that needs renewing before redecorating
- Weathered mastic on the most exposed windows
- Draughty sash windows at the surround
- Gaps round a timber door in stone or brick
For an older house near a landmark such as Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- What the cure time is
- Whether the sealant suits the joint
- Which colour the sealant will be
- How the surfaces are prepared before sealing
Sand mastic for homes and businesses in Langley Heath
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. Common call-outs are for old sand mastic that has cracked, crumbled or fallen out and wind and rain getting in round a sash window, across sash and case windows, period & listed homes and tenement windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Langley Heath is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Langley Heath (ME17)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
At the end, we look at the finished work together and explain the cure time. The visit itself generally takes a few hours for a single window, longer for several, depending on how much there is to do. Somewhere like Langley Heath needs a little journey planning: let us know about lanes, gates and parking. 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.
- Old mastic and any loose material are raked out.
- 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
- Clear items away from the joints we’re working on
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
Want a quote for sand mastic? Please call 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Advice
DIY versus a professional finish
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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Avoid patching sand mastic with silicone
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
- Plan mastic work ahead of painting
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Langley Heath homes and the weather
Historic houses like Stoneacre (about 1.4 miles north-west) are a reminder that the area around Langley Heath has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Senacre Technology College are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Hollingbourne station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Langley Heath is about 4 miles south-east of Maidstone, in Kent. Jobs in Langley Heath get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Kent, we cover 922 places, Langley Heath among them. For nearby work, see our London page, about 35 miles away.
Work in ME17 is quoted and booked the same way as anywhere else. Local streets include Skinner's Way, Shepherds Way and Heath Road, and we cover them all. If you’re just outside Langley Heath, we cover Langley (1 mile west), Five Wents (1 mile south-west), Warmlake (1 mile south), Chart Sutton (1 mile south-west) and Otham (1 mile north-west). Larger places within reach include Maidstone (4 miles north-west), Ashford (13 miles south-east), Sittingbourne (10 miles north-east), Tonbridge (14 miles west), Faversham (14 miles north-east) and Kings Hill (9 miles west).
Near you in Langley Heath
Around Langley Heath, our work takes us to homes and buildings near The Potting Shed pub and the streets around them. The closest station to Langley Heath is Hollingbourne station, roughly 2.5 miles north-east of the centre. Nearby you will also find The Dog Collar Museum (1.8 miles north-east) and The Mall Maidstone (4 miles north-west). Not far away are Detling Hill.
Why it’s worth doing now in Langley Heath
If you’re redecorating, renew the mastic first. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. Older cottages and farmhouses around Langley Heath can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
What you get with us
- One-year guarantee on every job
- Old sealant always removed completely
- Fully insured
- 180+ five-star Google reviews
Take a look at what affects the cost or what customers say.
Langley Heath: your questions answered
Is Langley Heath in your area for sand mastic?
Yes. Our work covers London and the South East, and Langley Heath is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Do you cover smaller places like Langley Heath?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Bigger jobs take longer.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
How do I get a quote for sand mastic in Langley Heath?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Different surfaces, different methods
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Towns and villages near Langley Heath
Other services in Langley Heath
Honest limits
In fairness, some problems need a different trade:
- Masonry that needs repairing
- Broken panes
- Planning or listed building consent (your local planning authority decides)
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Brick reveals
- Timber door frames
- Sash and case windows
- Period & listed homes
- Tenement windows
- Stone surrounds