Kent · England
Sand Mastic in Greatstone-on-Sea
Our applicators work in Greatstone-on-Sea on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Old cement repairs round a window that have failed
- Open joints round the window box
- Mastic worn away on windows facing the weather
Aftercare tips
So the new joints stay in good condition:
- Keep sills and gutters clear so water drains away
- Ask the planning authority about consent for listed or conservation-area homes
- Have rotten timber repaired before new mastic goes in
- Avoid heavy scraping on the mastic joint
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
How we handle sand mastic in Greatstone-on-Sea
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you have gaps where the frame meets the masonry and old sand mastic that has cracked, crumbled or fallen out, we can help, on stone surrounds, tenement windows and sash and case windows alike.
Around Greatstone-on-Sea, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Greatstone-on-Sea (TN28)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Greatstone-on-Sea: local notes
Greatstone-on-Sea is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to St Peter's include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Greatstone-on-Sea is about 9 miles south-west of Hythe, in Kent. Whether you’re in the middle of Greatstone-on-Sea or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Kent, we cover 922 places, and Greatstone-on-Sea is one of them. For nearby work, see our Brighton page (49 miles or so).
All of TN28 is covered for sand mastic. Local streets include Alfred Road, Meehan Road South and Hardy Road. Neighbouring places we cover for sand mastic include Littlestone-on-Sea (1 mile north), New Romney (1 mile north-west), Lydd-on-Sea (2 miles south), Lydd (3 miles south-west) and St Mary's Bay (3 miles north). Within a short drive, we also cover Ashford (12 miles north), Folkestone (12 miles north-east), Hythe (9 miles north-east), Hawkinge (13 miles north-east), Tenterden (14 miles north-west) and Cheriton (11 miles north-east).
What’s near Greatstone-on-Sea
We work in homes and buildings around Romney Warren Country Park, The Marsh Academy and The Jolly Fisherman pub and the streets around them. Nearby you will also find Romney 'castle' (3.2 miles north-west) and Lydd Town Museum (2.8 miles south-west). The countryside around Greatstone-on-Sea includes Dungeness National and Burnthouse Pen.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes anything from a few hours to a full day, depending on how many windows, depending on how much there is to do. For a village or hamlet like Greatstone-on-Sea, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Keep pets and children clear of the area while we work
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear price before any work starts.
Advice
What the job involves on each surface
Stone surrounds
Stone openings are rarely perfectly straight, so the gap isn’t the same all the way round. We shape it by hand to follow the stone.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
Also near Greatstone-on-Sea
Other services in Greatstone-on-Sea
Landlord and commercial work in Greatstone-on-Sea
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
In hotels, rooms out of use cost money, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Whether work needs listed building consent
- Damaged stone surrounds
- Decayed frames that need repair
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
Where we work in Greatstone-on-Sea
- Tenement windows
- Period & listed homes
- Timber door frames
- Brick reveals
- Sash and case windows
- Stone surrounds
What we’re called out for in Greatstone-on-Sea
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber and we normally remove them.
People normally contact us after spotting something like this:
- Window mastic to renew ahead of painting
- Mastic round period door frames that has failed
- Wind and rain getting in round a sash window
- Old cement repairs round a window that have failed
If you look after a building such as Greatstone Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Who turns up on the day
- Is VAT in the price?
- What preparation is included
- How long to leave it before use
Questions from Greatstone-on-Sea
Does the coastal weather in Greatstone-on-Sea affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Can you do sand mastic in Greatstone-on-Sea?
Yes, Greatstone-on-Sea is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
When will the new mastic be hard?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
Can you do several jobs on one visit?
Yes. Just list everything you need.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Can you replace silicone on a period window with sand mastic?
Yes. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Can I do it myself?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.