East Sussex · England
Sand mastic for sash & case windows in Golden Cross, East Sussex
We cover Golden Cross for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
- Failed mastic on an exposed elevation
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Take care around the mastic when scraping paint
- Don’t paint over the new mastic
- Don’t run silicone over sand mastic
- Keep sills and gutters clear so water drains away
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Sand mastic in Golden Cross, done properly
Sand mastic does not last for ever, leaving gaps round the window. Renewing it closes the gap and tidies the surround. We work on timber door frames, sash and case windows and period & listed homes, and people most often call us about mastic that needs renewing before redecorating and gaps where the frame meets the masonry.
Outdoor sealant needs dry, clean surfaces, so work on frames around Golden Cross is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
There’s a 12-month guarantee on every job.
- Where
- Golden Cross (BN27, BN8)
- Region
- East Sussex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Also in Golden Cross
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- Any working-time requirements on site
- Access and height
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and agree the price before starting.
Asking for a quote
When you call or email, these details help:
- If someone has resealed it before
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
Your questions about sand mastic in Golden Cross
Can you do sand mastic in Golden Cross?
Yes, Golden Cross is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
I let a flat near Berwick (Sussex) station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Should I check with the council before work on a listed or conservation-area home?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Why act early in Golden Cross
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Older cottages and farmhouses around Golden Cross can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
Why us?
- Homes, businesses and hotels
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
- We leave the area clean and tidy
Read our cost guide or what customers say.
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Putty and glazing repairs
- Whether work needs listed building consent
- Crumbling stone or brickwork round the window
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
Where we work in Golden Cross
- Stone surrounds
- Brick reveals
- Timber door frames
- Tenement windows
- Sash and case windows
- Period & listed homes
What happens on the day
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. Somewhere like Golden Cross 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.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- Let us know about stairs, lifts or work at height
How to get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
What sand mastic looks like in Golden Cross
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Michelham Priory (about 2.3 miles south-east) nearby, there’s older building stock in the area around Golden Cross as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you let a flat or house near Berwick (Sussex) station, cracked sand mastic around sash windows lets in the draughts tenants complain about. In the older streets around The Parish Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Golden Cross is about 4 miles north-west of Hailsham, in East Sussex. Homes, rented property, offices and hotels in Golden Cross can book us for sand mastic. The work is guaranteed for a year. We cover 289 towns and villages across East Sussex, from the larger towns to small villages. You can also see our page for Brighton, roughly 14 miles from Golden Cross.
Postcode districts we cover here for sand mastic: BN27 and BN8. That includes homes and businesses on Burgh Hill Road and Golden Cross. Other places close to Golden Cross include Wickstreet (2 miles south), Ripe (2 miles south-west), Laughton (2 miles west), Arlington (3 miles south) and Berwick (4 miles south). Larger places within reach include Eastbourne (8 miles south-east), Bexhill-on-Sea (13 miles east), Seaford (9 miles south-west), Lewes (8 miles west), Hailsham (4 miles south-east) and Crowborough (11 miles north).
Local landmarks in Golden Cross
Around Golden Cross, our work takes us to homes and buildings near The Golden Cross Inn. Golden Cross’s nearest station is Berwick (Sussex) station, roughly 3.6 miles south. Nearby you’ll also find Sussex Farm Museum (3.9 miles north-east) and Hellingly Hospital Railway (3.3 miles east).
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
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.
When to call us in Golden Cross
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
Keep an eye out for any of the following:
- Patchy fillers round a sash window
- Gaps round a timber door in stone or brick
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
Schools such as Chiddingly Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- The length of the guarantee
- Which sealant they’ll use, and why
- Whether VAT is included
- Which colour the sealant will be