Kent · England
Sand mastic for sash & case windows in Winterbourne, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Winterbourne and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
Sand mastic in Winterbourne
Sand mastic does not last for ever, leaving gaps round the window. Renewing it closes the gap so the surround looks right again. We work on sash and case windows, period & listed homes and timber door frames, and the jobs we see most are a silicone bead on a sash window that spoils the look and old sand mastic that has cracked, crumbled or fallen out.
Homes in small places like Winterbourne often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
You get a one-year guarantee, the same in Winterbourne as everywhere else we work.
- Place
- Winterbourne (ME13)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Do not run silicone over sand mastic
- Don’t paint over the new mastic
- Have rotten timber repaired before new mastic goes in
- Take care around the mastic when scraping paint
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
What sand mastic looks like in Winterbourne
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Selling station, older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like Boughton-under-Blean and Dunkirk Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Christ Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Winterbourne is about 4 miles south-east of Faversham, in Kent. Homes, rented property, offices and hotels in Winterbourne can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Across Kent, we cover 922 places, and Winterbourne is one of them. There’s also a page for Chelmsford, about 37 miles away.
Postcode districts we cover here for sand mastic: ME13. Nearby, we also carry out sand mastic in Hickmans Green (1 mile north-west), Oversland (1 mile south-west), South Street (1 mile west), Boughton under Blean (1 mile north) and Crouch (1 mile west). Within a short drive, we also cover Ashford (11 miles south), Canterbury (5 miles east), Sittingbourne (11 miles north-west), Whitstable (6 miles north-east), Faversham (4 miles north-west) and Herne Bay (9 miles north-east).
Landmarks near Winterbourne
Typical jobs here are in homes near The Queens Head pub and Mount Ephraim Gardens and the streets around them. For rail, the closest station is Selling station, roughly 1 mile south-west of the centre. A little further out are Chilham Castle (2.9 miles south) and Eastbridge Hospital of St Thomas the Martyr (5.1 miles east). Open spaces near Winterbourne include Blean Woods RSPB Reserve.
Landlord and commercial work in Winterbourne
For anyone letting property in or around Winterbourne, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
We also work for property managers and facilities teams in Winterbourne and across Kent. Several sites can be quoted together, and we are fully insured for the work.
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- Whether there’s mould to deal with
- Which sealant suits the joint
- The amount of work
- The number of rooms or windows
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or drop us an email and we’ll talk you through it.
Asking for a quote
To help us quote quickly, let us know:
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Where a wall is exposed, as many are in small places like Winterbourne, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Doing several joints on one visit normally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
Why us?
- An ARBOMaster approved applicator
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
Read how sealant jobs are priced or our reviews.
How the job changes by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Period and listed homes
Period homes look their best with traditional materials.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Places near Winterbourne
Also in Winterbourne
Your questions about sand mastic in Winterbourne
Will you come out to Winterbourne?
Yes, Winterbourne is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Selling station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
What should I tell you?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Can sand mastic be painted?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
What guarantee comes with the work?
There’s a 12-month guarantee on every job.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
What we do, step by step
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours for a single window, longer for several for a typical job. For a village or hamlet like Winterbourne, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- 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
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.