East Sussex · England
Sand mastic for sash & case windows in Cliffe, East Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Cliffe and across East Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Gaps round a timber door in stone or brick
Looking after it afterwards
So the new joints stay in good condition:
- Don’t run silicone over sand mastic
- Go gently near the mastic when preparing windows
- Check with your local planning authority if your home is listed
- Plan mastic work ahead of painting
Leave the new mastic alone while it firms up. It forms a skin fairly soon but needs longer to fully harden.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Sand mastic in Cliffe, done properly
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. If you have a silicone bead on a sash window that spoils the look and draughty sash windows at the surround, we can put it right, on stone surrounds, period & listed homes and brick reveals alike.
Houses in smaller places like Cliffe can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
All of our work is guaranteed for twelve months, in Cliffe and everywhere else we cover.
- Place
- Cliffe (BN7, BN8)
- Wider area
- East Sussex
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work can’t fix
To be straight with you, some problems need a different trade:
- Broken panes
- Sashes that need overhauling
- Decayed frames that need repair
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before booking.
What we seal
- Timber door frames
- Stone surrounds
- Period & listed homes
- Tenement windows
- Brick reveals
- Sash and case windows
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we will confirm access.
What we’re called out for in Cliffe
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
These are the problems we’re asked about most:
- Patchy fillers round a sash window
- Mastic round period door frames that has failed
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
Rented homes near Lewes station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
What to look for in a quote
- Whether you can choose the colour
- How long to leave it before use
- Whether they seal over old material or remove it
- What happens if the job turns out different
Frames and glazing around Cliffe
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Anne of Cleves House (about 0.7 miles south-west) nearby, there’s older building stock in the area around Cliffe as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near Church of St Thomas at Cliffe, the joint between an old wall and a newer frame is generally the first place rain gets in. If you look after a building such as Priory School, its window and door frames need their mastic kept sound, just like a home’s.
Cliffe is about 1 mile east of Lewes, in East Sussex. Whether you are in the middle of Cliffe or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 289 towns and villages across East Sussex. Our Brighton page covers work nearby.
All of BN7 and BN8 is within our area for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on Ham Lane, New Road and Court Road or a nearby road, we can help. You’ll find Cliffe on the A26, which makes it straightforward to reach. Nearby, we also carry out sand mastic in Southover (1 mile south-west), South Malling (1 mile north-west), Lewes (1 mile west), Hamsey (2 miles north) and Offham (2 miles north-west). We also work in nearby towns such as Eastbourne (13 miles south-east), Seaford (8 miles south-east), Hailsham (10 miles east), Crowborough (14 miles north-east), Uckfield (7 miles north-east) and Newhaven (6 miles south).
What’s near Cliffe
Typical jobs here are in homes near Gardeners Arms, Railway Land and Lewes Old Grammar School, among other places. Cliffe has its own railway station: Lewes station. Nearby you will also find Lewes Castle (0.5 miles west) and Lewes Victoria Hospital (1.1 miles west). Open spaces near Cliffe include Cliffe Hill and Malling Down.
For landlords and businesses
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
Questions from Cliffe
I let a flat near Lewes station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Will you come out to Cliffe?
Yes. Cliffe is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long does sand mastic take to harden?
Not straight away. The skin forms first, and the full set comes later, and we will tell you what to expect.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses, and we’re fully insured.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
Should I use sand mastic or silicone?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames usually get a flexible sealant.
What affects the cost of sand mastic
We quote each job individually. These are the things that affect it:
- The product the joint needs
- The size of the job
- How much old sealant there is and how hard it is to remove
- Access and height
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
You don’t need to know the technical terms. Just tell us:
- The rough size of the job
- What’s wrong with the joints now
- Whether it’s a home or a business
- Pictures of the joints, sent by email
Want a quote for sand mastic? Please call 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.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. For a job in Cliffe, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Keep children and pets away from the work area
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
We quote each job on its own. Just call 0345 464 0079 or send us an email with the details, and pictures are welcome.