East Sussex · England
Sand mastic for sash & case windows in Broad Oak, East Sussex
Sand mastic for Broad Oak, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Open joints round the window box
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
How we quote for sand mastic
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Any mould that needs treating
- Working hours on commercial sites
- The product the joint needs
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What to tell us for a quote
To make quoting easier, let us know:
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- Where the property is
- The rough size of the job
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
Sand mastic for homes and businesses in Broad Oak
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it so the surround looks right again. Common call-outs are for gaps where the frame meets the masonry and tired mastic found when preparing windows for paint, on tenement windows, timber door frames and sash and case windows.
Homes in small places like Broad Oak often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Broad Oak (TN21)
- Wider area
- East Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
How it works
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours for a single window, longer for several for a typical job. Somewhere like Broad Oak needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Clear the area around the work
- Mention any sign-in or site rules at work premises
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or drop us an email.
Read more
Landlords, agents and businesses in Broad Oak
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Towns and villages near Broad Oak
What else we do in Broad Oak
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
When to call us in Broad Oak
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber and we normally remove them.
These are the problems we’re asked about most:
- Gaps round a timber door in stone or brick
- Window mastic to renew ahead of painting
- Old cement repairs round a window that have failed
- Draughty sash windows at the surround
Homes close to Ebenezer Chapel include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before you book anyone
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
- What preparation is included
Broad Oak homes and the weather
Historic houses like Bateman's (about 4.2 miles east) are a reminder that the area around Broad Oak has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Broad Oak Community Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Stonegate station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Broad Oak is about 7 miles south-east of Crowborough, in East Sussex. Homes, rented property, offices and hotels in Broad Oak is covered for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across East Sussex, we cover 289 places, Broad Oak among them. We also work in Brighton, around 21 miles away.
We cover every part of the TN21 postcode area for sand mastic and the streets around it. Local streets include Halley Road, Burwash Road and Highview Road, all of which we cover. Nearby, we also carry out sand mastic in Cade Street (1 mile south-west), Old Heathfield (1 mile south), Heathfield (2 miles south-west), Sandy Cross (2 miles south-west) and Maynard's Green (3 miles south-west). We also work in nearby towns such as Eastbourne (13 miles south), Hastings (14 miles south-east), Bexhill-on-Sea (12 miles south-east), Lewes (14 miles south-west), Hailsham (8 miles south) and Crowborough (7 miles north-west).
What’s near Broad Oak
Around Broad Oak, our work takes us to homes and buildings near Heathfield Community College, among other places. The nearest railway station is Stonegate station, about 4.5 miles north-east. Well-known places in the area include Old Castle (3.7 miles south-east) and Sussex Farm Museum (3.6 miles south-west). Open spaces near Broad Oak include Selwyns Wood.
Honest limits
It helps to know what we cannot do too:
- Decisions on consent for listed homes
- Timber that has rotted
- Cracked or broken glass
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Period & listed homes
- Tenement windows
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
Broad Oak questions
Can you do sand mastic in Broad Oak?
Yes. We work across London and the South East, and Broad Oak is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
I let a flat near Stonegate station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Are you fully insured?
Yes, we are fully insured for every job we do.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures.
Do you guarantee sand mastic work?
Our one-year guarantee covers every job.
How do I get a quote for sand mastic in Broad Oak?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.