East Sussex · England
Sweethaws Sand Mastic
Professional sand mastic in and around Sweethaws, with every bit of old sealant taken out first.
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
- Gaps round a timber door in stone or brick
Sand mastic in Sweethaws, done properly
Traditional burnt sand mastic that sits naturally against stone and brick. It suits period and listed homes where a modern sealant bead would stand out. If you’re dealing with mastic round period door frames that has failed and mastic dropping out of the joint, we can help, whatever the surface.
Around Sweethaws, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Our work is backed for twelve months, in Sweethaws and everywhere else we cover.
- Where
- Sweethaws (TN6)
- Region
- East Sussex
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Get any rot dealt with first
- Renew mastic before redecorating the windows
- Do not run silicone over sand mastic
- Leave the new mastic unpainted
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
When it is not the sealant
It helps to know what we cannot do too:
- Sashes that rattle, stick or will not open
- Crumbling stone or brickwork round the window
- Broken panes
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Where we work in Sweethaws
- Sash and case windows
- Period & listed homes
- Tenement windows
- Stone surrounds
- Timber door frames
- Brick reveals
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Places near Sweethaws
What else we do in Sweethaws
What we do, step by step
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours per window, depending on the condition of the joints. In a small place like Sweethaws, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Keep pets and children clear of the area while we work
- Mention any sign-in or site rules at work premises
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand.
Read more
What sand mastic looks like in Sweethaws
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Crowborough station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Sweethaws is about 2 miles south-west of Crowborough, in East Sussex. Sweethaws gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Sweethaws is one of 289 towns and villages in East Sussex where we work for sand mastic. There’s also a page for Crawley, about 15 miles away.
All of TN6 is covered for sand mastic. If you are just outside Sweethaws, we cover High Hurstwood (1 mile south), Crowborough (2 miles north-east), Fairwarp (2 miles south-west), Jarvis Brook (2 miles north-east) and Marden's Hill (2 miles north). Further out, we also cover Lewes (12 miles south-west), Hailsham (13 miles south-east), Uckfield (5 miles south), South Malling (12 miles south-west), Heathfield (7 miles south-east) and Southover (13 miles south-west).
What’s near Sweethaws
Locally, jobs take us to homes and businesses close to The Crow & Gate inn and the streets around them. Sweethaws’s nearest station is Crowborough station, roughly 2.2 miles east. Well-known places in the area include Tickerage Castle (4.6 miles south) and Crowborough War Memorial Hospital (1.3 miles north-east). Open spaces near Sweethaws include Crowborough Country Park.
Do you need sand mastic in Sweethaws?
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
Signs it’s time to call us include:
- Mastic dropping out of the joint
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
- Draughty sash windows at the surround
For site and facilities teams at buildings such as Beacon Academy, its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- Which colour the sealant will be
- Which sealant they’ll use, and why
- What guarantee comes with the work
- Whether they seal over old material or remove it
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Access and height
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- The type of sealant required
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The problem you’ve noticed
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- The address or postcode of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Questions from Sweethaws
Do you cover smaller places like Sweethaws?
Yes. Sweethaws is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is Sweethaws in your area for sand mastic?
Yes. Our work covers London and the South East, and Sweethaws is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Is there any odour?
There can be a smell while the sealant cures. Opening a window helps.
Should I check with the council before work on a listed or conservation-area home?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
What does sand mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Do you work for landlords and businesses?
Yes, often. We can quote for several properties at once.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Surface by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.