East Sussex · England
Sand mastic for sash & case windows in Windmill Hill, East Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Windmill Hill. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed mastic on an exposed elevation
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
What happens on the day
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to a full day, depending on how many windows. Somewhere as small as Windmill Hill, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Keep pets and children clear of the area while we work
- For indoor joints, keep the area dry beforehand if you can
- Mention if the joints have been sealed before
Getting a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
Sand mastic in Windmill Hill
Across Windmill Hill, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. Typical jobs include draughts and rain around sash boxes and cement or filler used on old window joints that has cracked, on stone surrounds, brick reveals and sash and case windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Windmill Hill is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months.
- Place
- Windmill Hill (BN27)
- Wider area
- East Sussex
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
Sand mastic in Windmill Hill: local notes
With historic houses such as Horselunges Manor (about 4 miles west) nearby, there’s older building stock in the area around Windmill Hill 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. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Normans Bay station? Then any sash windows need sound mastic to keep draughts and rain out. Managing a site like Herstmonceux Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Windmill Hill is about 4 miles north-east of Hailsham, in East Sussex. From the centre of Windmill Hill to the outskirts, we cover sand mastic for every kind of property. Across East Sussex, we cover 289 places, and Windmill Hill is one of them. You can also see our page for Brighton, about 21 miles away.
Every address in BN27 is within our area for sand mastic. Streets in the area include Middleway, Dales Close and Victoria Road, and we cover them all. Windmill Hill sits on or near the A271, which makes travel easy. If you’re just outside Windmill Hill, we cover Chapel Row (1 mile west), Flowers Green (1 mile south-west), Herstmonceux (1 mile west), Golden Cross (1 mile south-west) and Stunts Green (1 mile north-west). We also work in nearby towns such as Eastbourne (7 miles south), Hastings (10 miles east), Bexhill-on-Sea (6 miles south-east), Seaford (13 miles south-west), Lewes (15 miles west) and Hailsham (4 miles south-west).
Around Windmill Hill
Typical jobs here are in homes near The Brewers' Arms Inn, among other places. The nearest railway station is Normans Bay station, roughly 4.7 miles south-east of the centre. A little further out are Herstmonceux Castle (1.1 miles south) and Amberstone Hospital (2.8 miles west).
Nearby places to Windmill Hill
Also in Windmill Hill
Aftercare tips
To keep the joints looking good and working properly:
- Check the mastic when you check the paintwork
- Avoid patching sand mastic with silicone
- Avoid heavy scraping on the mastic joint
- Sort the mastic before the decorators arrive
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What affects the quote in Windmill Hill
Some jobs are bigger than they look, and some smaller. The main factors:
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- The size of the job
- How many rooms, windows or areas are involved
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What to tell us for a quote
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- Any access issues, like height or stairs
- If someone has resealed it before
- The type of property
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or send us an email.
FAQs for Windmill Hill
Is Windmill Hill within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Normans Bay station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Are you insured?
Yes. Mr Mastic is fully insured.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we will explain our choice.
Where is Mr Mastic based?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
When to call us in Windmill Hill
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
Any of these means the joints need attention:
- Mastic worn away on windows facing the weather
- Tired mastic found when preparing windows for paint
- Gaps where the frame meets the masonry
- Old cement repairs round a window that have failed
Historic houses such as Horselunges Manor, about 4 miles west, show how far back building around Windmill Hill goes.
Comparing quotes
- How the joint is cleaned and prepared
- How long the guarantee is
- Are they insured?
- Whether all the old sealant comes out first
When something else is needed
A few problems are outside what sealant work can do:
- Whether work needs listed building consent
- Sashes that rattle, stick or will not open
- Timber that has rotted
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Where we work in Windmill Hill
- Period & listed homes
- Tenement windows
- Sash and case windows
- Stone surrounds
- Timber door frames
- Brick reveals