Kent · England
Sand mastic for sash & case windows in Grafty Green, Kent
Sand mastic for Grafty Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Modern sealant on a period surround
- Mastic worn away on windows facing the weather
- Old sand mastic that has cracked, crumbled or fallen out
Sand mastic in Grafty Green
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. We work on tenement windows, timber door frames and sash and case windows, and the jobs we see most are weathered mastic on the most exposed windows and crumbling sand mastic round a window.
In a village or hamlet like Grafty Green, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Grafty Green (ME17)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of sand mastic
The price is agreed before any work begins. It’s based on:
- How many rooms, windows or areas are involved
- The product the joint needs
- Any mould that needs treating
- How easy the joints are to reach
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start.
What to tell us for a quote
To make quoting easier, please include:
- The type of property
- Where the property is
- If someone has resealed it before
- How we’d reach the joints
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
How the job changes by surface
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.
The process
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes a few hours for a single window, longer for several. Somewhere like Grafty Green 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.
- First we agree which joints need doing.
- 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.
How to prepare
- Let us know about earlier repairs to the joints
- Mention any tricky access
- Mention any sign-in or site rules at work premises
Ask for a quote
Getting a quote is simple: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we will take it from there.
Related advice
Places near Grafty Green
More services for Grafty Green
Signs you need sand mastic in Grafty Green
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
Look out for these signs:
- A silicone bead on a sash window that spoils the look
- Mastic worn away on windows facing the weather
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
Managing a site like Platts Heath Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- What the cure time is
- What the quote includes, VAT included or not
- Who turns up on the day
- How the surfaces are prepared before sealing
Sand mastic in Grafty Green: local notes
With historic houses such as Leeds Castle (about 3.5 miles north-west) nearby, there’s older building stock in the area around Grafty Green as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St Nicholas, the joint between an old wall and a newer frame is usually the first place rain gets in. Rented homes near Lenham station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Grafty Green is about 8 miles south-east of Maidstone, in Kent. Homes, rented property, offices and hotels in Grafty Green can book us for sand mastic. The work is guaranteed for a year. Across Kent, we cover 922 places, Grafty Green among them. We also work in Chelmsford, around 37 miles away.
Jobs for sand mastic in ME17 is quoted and booked the same way as anywhere else. We cover properties on Church Road, Woodcock Lane and Headcorn Road and the roads around them. If you’re just outside Grafty Green, we cover Liverton Street (1 mile north), Boughton Malherbe (1 mile north-east), Broadstone (1 mile south-west), Eastwood (1 mile west) and Platt's Heath (1 mile north). Larger places within reach include Maidstone (8 miles north-west), Ashford (9 miles south-east), Sittingbourne (10 miles north), Faversham (12 miles north-east), Minster (15 miles north) and Kings Hill (13 miles west).
Near you in Grafty Green
Typical jobs here are in homes near Kiln Wood, The Kings Head Public House and The Lenham School, among other places. The nearest railway station is Lenham station, roughly 2.1 miles north-east of the centre. Well-known places in the area include The Dog Collar Museum (3.4 miles north-west) and Coldbridge Castle (1 mile south-east).
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Have rotten timber repaired before new mastic goes in
- Keep modern sealant off the mastic
- Avoid heavy scraping on the mastic joint
- Make sure water runs off the sill
Do not touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
Grafty Green: your questions answered
Can you help a landlord with a rental near Lenham station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Can you do sand mastic in Grafty Green?
Yes. Our work covers London and the South East, and Grafty Green is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
How much does sand mastic cost in Grafty Green?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or email us and let us know what needs doing and where.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Is consent needed for window work on a listed home?
Checking first is sensible. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Sash cords, weights and draught-proofing of the sashes
- Cracked or broken glass
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Period & listed homes
- Tenement windows
- Sash and case windows
- Brick reveals
- Timber door frames
- Stone surrounds