East Sussex · England
Birling Gap Sand Mastic
We cover Birling Gap 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 every job guaranteed for a year.
- Mastic dropping out of the joint
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
What we do, step by step
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a single window, longer for several for a typical job. Somewhere like Birling Gap 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 look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
How to get a quote
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or email us and describe the job.
Related advice
Sand mastic in Birling Gap
Sand mastic does not last for ever, leaving gaps round the window. We rake it out and renew it so the surround looks right again. If you have modern sealant on a period surround and gaps round a timber door in stone or brick, we can help.
Around Birling Gap, 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.
Whatever the size of the job, you get the same 12-month guarantee.
- Where
- Birling Gap (BN20)
- Region
- East Sussex
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we can’t put right
Before you book, it’s worth knowing the limits:
- Timber that has rotted
- Broken panes
- Sashes that rattle, stick or will not open
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Timber door frames
- Stone surrounds
- Period & listed homes
- Tenement windows
- Sash and case windows
- Brick reveals
Looking after it afterwards
So the new joints stay in good condition:
- Get any rot dealt with first
- Plan mastic work ahead of painting
- Ask the planning authority about consent for listed or conservation-area homes
- Check the mastic when you check the paintwork
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Other services in Birling Gap
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What the job involves on each surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Landlords, agents and businesses in Birling Gap
Landlords and letting agents in Birling Gap can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Birling Gap questions
Is sand mastic in a coastal place like Birling Gap any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Can you help a landlord with a rental near Eastbourne station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
What does sand mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Do you guarantee sand mastic work?
Every job comes with our 12-month guarantee.
Can you match the sealant colour?
Generally, yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before any work starts.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Birling Gap homes and the weather
Birling Gap is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Historic houses like Alfriston Clergy House (about 4.7 miles north-west) are a reminder that the area around Birling Gap has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Eastbourne station, older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around The Parish Church of St Simon and St Jude, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Birling Gap is about 5 miles south-east of Seaford, in East Sussex. For sand mastic in and around Birling Gap, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover East Sussex from our Crawley base. Our area takes in 289 places across East Sussex, from the larger towns to small villages. We also work in Brighton, about 16 miles from Birling Gap.
Work in BN20 is quoted and booked the same way as anywhere else. Nearby, we also carry out sand mastic in East Dean (1 mile north), Friston (1 mile north), Meads (3 miles east), Holywell (3 miles east) and Old Town (3 miles north-east). Within a short drive, we also cover Eastbourne (5 miles north-east), Bexhill-on-Sea (14 miles north-east), Seaford (5 miles north-west), Lewes (13 miles north-west), Hailsham (9 miles north) and Newhaven (8 miles north-west).
Near you in Birling Gap
Birling Gap’s nearest station is Eastbourne station, roughly 3.9 miles north-east of the centre. Other landmarks nearby include Eastbourne District General Hospital (4.1 miles north-east) and Rnli Eastbourne Lifeboat Museum (3.9 miles east). The countryside around Birling Gap includes Combe Hill.
Why act early in Birling Gap
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Where a wall is exposed, as many are in small places like Birling Gap, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why us?
- An ARBOMaster approved applicator
- We leave the area clean and tidy
- Old sealant always removed completely
- We are fully insured