Kent · England
Sand mastic for sash & case windows in Swanton, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Swanton and across Kent. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
- Mastic that needs renewing before redecorating
What we do, step by step
You don’t need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints for a typical job. In a small place like Swanton, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- 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.
Preparing for the visit
- Mention any parking rules near the property
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Read more
About our sand mastic in Swanton
Sand mastic does not last for ever and gaps open up round the frame. We rake it out and renew it so the surround looks right again. We work on period & listed homes, stone surrounds and timber door frames, and people most often call us about tired mastic found when preparing windows for paint and draughty sash windows at the surround.
Around Swanton, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a one-year guarantee, so you are covered after we have gone.
- Where
- Swanton (ME18)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Swanton
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. Older cottages and farmhouses around Swanton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What you get with us
- Tidy, careful work
- More than 20 years in sealant work
- Any old sealant cut out fully, not covered over
- Rated 4.9 stars on Google
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Swanton questions
Do you work for landlords with property near Wateringbury station?
Yes. We work for landlords and agents as well as householders. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Swanton?
Yes. Swanton is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
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 finished to sit neatly against the masonry.
How long does sand mastic take to harden?
It takes a while. It skins first and hardens fully later, and we’ll tell you what to expect.
Can you seal over the old sealant?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Can you quote for more than one area?
Yes. More than one area can go on one quote.
What guarantee comes with the work?
Our one-year guarantee covers every job.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Make sure water runs off the sill
- Avoid patching sand mastic with silicone
- Don’t paint over the new mastic
- Ask a joiner to look at soft timber first
Do not run silicone over the new mastic. If you see a crack, ask us to take a look rather than patching it.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
What sand mastic looks like in Swanton
With historic houses such as Old Soar Manor (about 1.5 miles west) nearby, there’s older building stock in the area around Swanton 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of St Dunstan, the joint between an old wall and a newer frame is usually the first place rain gets in. Schools such as Mereworth Community Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Wateringbury station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Swanton is about 5 miles north-east of Tonbridge, in Kent. Swanton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 922 towns and villages across Kent, from the larger towns to small villages. London is on our list too, around 26 miles away.
Every address in ME18 is within our area for sand mastic, from the main roads to the quietest streets. We also cover West Peckham (1 mile south), New Pound (1 mile north-east), Mereworth (1 mile east), Herne Pound (1 mile north-east) and Roughway (1 mile west). We also work in nearby towns such as Maidstone (8 miles east), Dartford (14 miles north-west), Sevenoaks (7 miles west), Royal Tunbridge Wells (9 miles south-west), Gravesend (12 miles north) and Tonbridge (5 miles south-west).
Landmarks near Swanton
In Swanton, that means homes and buildings near Swan on the Green pub, among other places. For rail, the closest station is Wateringbury station, about 3 miles east of the centre. Nearby you’ll also find Beechin Wood Archery Museum (2 miles north-west) and Ightham Court (3.8 miles north-west).
What affects the quote in Swanton
The price is agreed before any work begins. It’s based on:
- Whether the work is at height
- How many areas need sealing
- When we can work, for business premises
- Any mould that needs treating
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- A few pictures by email, if you can
There’s no standard price list. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Crumbling stone or brickwork round the window
- Sashes that need overhauling
- Decayed frames that need repair
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Swanton
- Brick reveals
- Stone surrounds
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows