East Sussex · England
Sand mastic for sash & case windows in High Cross, East Sussex
Professional sand mastic in and around High Cross, with old sealant always removed completely.
- Draughty sash windows at the surround
- Gaps between timber frames and stone or brick
- Mastic dropping out of the joint
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Sand mastic for homes and businesses in High Cross
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead and we’ll explain which is best for yours. We work on sash and case windows, timber door frames and period & listed homes, and the jobs we see most are a silicone bead on a sash window that spoils the look and mastic worn away on windows facing the weather.
Outdoor sealant needs dry, clean surfaces, so work on frames around High Cross is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months.
- Where
- High Cross (TN6)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to High Cross
What else we do in High Cross
What happens on the day
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a single window, longer for several. For a village or hamlet like High Cross, 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.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Let us know about earlier repairs to the joints
Getting a quote
Need a quote? Please phone 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before any work starts.
Advice
Common problems we fix in High Cross
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint and we normally remove them.
The problems people usually mention when they call are:
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
If you live in an older home near The Parish Church of St Denys, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- What insurance they hold
- How the colour is chosen
- What the cure time is
- Which sealant they’ll use, and why
High Cross homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Wadhurst Castle (about 4.9 miles east) are a reminder that the area around High Cross has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Managing a site like Rotherfield Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Crowborough station, any sash windows need sound mastic to keep draughts and rain out.
High Cross is about 3 miles east of Crowborough, in East Sussex. Whether you’re in the middle of High Cross or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our East Sussex coverage runs to 289 places, and High Cross is one of them. Our Crawley page covers work nearby, about 19 miles away.
Every address in TN6 is covered for sand mastic. Main roads around High Cross include the B2101. Other places close to High Cross include Argos Hill (1 mile east), Rotherfield (1 mile north-west), Town Row (1 mile north), Woolbridge (1 mile south) and Wellbrook (2 miles south-east). Larger places within reach include Lewes (15 miles south-west), Hailsham (12 miles south), Crowborough (3 miles west), Uckfield (7 miles south-west), Polegate (15 miles south) and South Malling (14 miles south-west).
Around High Cross
Locally, jobs take us to homes and businesses close to The King's Arms Public House. The closest station to High Cross is Crowborough station, roughly 1.8 miles west. Other landmarks nearby include Crowborough War Memorial Hospital (3.1 miles west). The countryside around High Cross includes Crowborough Country Park.
What affects the cost of sand mastic
We do not publish a price list. The quote depends on:
- How many areas need sealing
- How easy the joints are to reach
- Whether there’s mould to deal with
- When we can work, for business premises
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Helping us quote
When you contact us, these details help:
- Where the property is
- The rough size of the job
- The type of property
- How we’d reach the joints
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or email us.
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Masonry that needs repairing
- Putty and glazing repairs
- Decisions on consent for listed homes
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Brick reveals
- Tenement windows
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Timber door frames
High Cross questions
I let a flat near Crowborough station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Will you come out to High Cross?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What do you need from me for a quote?
Let us know what needs doing and where, plus pictures if you have them. We’ll ask anything else we need to know.
How long will you be here?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer.
What guarantee comes with the work?
Every job comes with our one-year guarantee.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
How much does sand mastic cost in High Cross?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Keep modern sealant off the mastic
- Find out about consent before window work on a listed home
- Do not paint over the new mastic
- Get any rot dealt with first
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
How the job changes by surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Stone surrounds
Stone openings are rarely perfectly straight, so the gap isn’t the same all the way round. Sand mastic is shaped by hand to suit.