East Sussex · England
Sand Mastic in Crumbles
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Crumbles, backed by a 12-month guarantee. Call for a quick quote.
- Silicone on a period window that looks wrong
- Mastic dropping out of the joint
- Failed mastic on an exposed elevation
Sand mastic in Crumbles, done properly
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant, and we’ll talk through which suits your home. Common call-outs are for patchy fillers round a sash window and mastic round period door frames that has failed, on stone surrounds, timber door frames and tenement windows.
In a village or hamlet like Crumbles, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Crumbles (BN23)
- Wider area
- East Sussex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Crumbles
Is sand mastic in a coastal place like Crumbles any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Crumbles?
Yes, Crumbles is covered. 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.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first.
Is consent needed for window work on a listed home?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
Are you insured?
Yes. We are fully insured for domestic and commercial work.
How long will you be here?
That depends on how much there is to do, but most jobs take a few hours per window, depending on the condition of the joints. We’ll give you a better idea when we quote.
How much does sand mastic cost in Crumbles?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or drop us an email and tell us what needs doing and where.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Also near Crumbles
What else we do in Crumbles
When to call us in Crumbles
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
Common reasons people contact us are:
- Failed mastic on an exposed elevation
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Mastic round period door frames that has failed
Homes close to St. Richard include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before you book
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
- What the cure time is
- What guarantee comes with the work
Landlords, agents and businesses in Crumbles
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.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours per window, depending on the condition of the joints. Somewhere like Crumbles needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
When it is not the sealant
In fairness, there are a few things sealant won’t fix:
- Whether work needs listed building consent
- Timber that has rotted
- Crumbling stone or brickwork round the window
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Tenement windows
- Period & listed homes
- Stone surrounds
- Brick reveals
Crumbles homes and the weather
Crumbles is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as St Catherine's College, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Pevensey & Westham station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Crumbles is about 2 miles east of Eastbourne, in East Sussex. We carry out sand mastic for householders, landlords and businesses in Crumbles and nearby, as part of our work across East Sussex. 289 places in East Sussex are on our list, from the larger towns to small villages. Our Brighton page covers work nearby, about 20 miles away.
Jobs for sand mastic in BN23 works the same way as everywhere else we cover. If you need sand mastic at a property on Tambora Square, Long Beach View and Golden Gate Way or anywhere close by, our applicators can take on the job. If you are just outside Crumbles, we cover Langney (1 mile west), Pevensey Bay (1 mile north-east), Pevensey (2 miles north), Westham (2 miles north-west) and Stone Cross (2 miles north-west). We also work in nearby towns such as Hastings (11 miles north-east), Bexhill-on-Sea (7 miles north-east), Seaford (10 miles west), Lewes (15 miles west), Hailsham (6 miles north-west) and St Leonards (10 miles north-east).
Landmarks near Crumbles
Typical jobs here are in homes near The Haven Voluntary Aided CofE/Methodist Primary School and Princes Park. The nearest railway station is Pevensey & Westham station, roughly 1.3 miles north of the centre. A little further out are Pevensey Court House Museum And Gaol (1.6 miles north) and Pevensey Castle (1.5 miles north). The countryside around Crumbles includes Combe Hill.
Why it’s worth doing now in Crumbles
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. In a small place like Crumbles, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Crumbles
- Every job guaranteed for a year
- Approved under the ARBOMaster scheme
- Full insurance on every job
- Old sealant always removed completely
Take a look at our cost guide and customer reviews.
Looking after it afterwards
After the cure time, these simple habits help:
- Sort the mastic before the decorators arrive
- Do not paint over the new mastic
- Don’t run silicone over sand mastic
- Make sure water runs off the sill
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Surface by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the gap isn’t the same all the way round. Sand mastic is shaped by hand to suit.
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.