Kent · England
Sand mastic for sash & case windows in Sundridge, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Sundridge, with a one-year guarantee on every job. Ask us for a quote.
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
- Mastic that needs renewing before redecorating
About our sand mastic in Sundridge
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. Typical jobs include a silicone bead on a sash window that spoils the look and mastic round period door frames that has failed, on timber door frames, stone surrounds and sash and case windows.
In a village or hamlet like Sundridge, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
Your job is guaranteed for a year, as with all our work.
- Place
- Sundridge (TN14)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes a few hours for a single window, longer for several. Somewhere like Sundridge needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
How to get a quote
There’s no standard price list. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or email us.
Advice
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
What affects the quote in Sundridge
There’s no set price list. The quote depends on:
- The size of the job
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
- Access and height
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
What we need to know
To help us quote quickly, let us know:
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- What’s wrong with the joints now
- Any previous sealing or DIY work
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.
Windows and doors in Sundridge
Historic houses like Quebec House (about 2.3 miles west) are a reminder that the area around Sundridge has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Combe Bank School? Then the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For landlords with property near Dunton Green station, any sash windows need sound mastic to keep draughts and rain out.
Sundridge is about 3 miles west of Sevenoaks, in Kent. Every kind of property in Sundridge is covered for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. We cover 922 towns and villages across Kent, large and small. We also work in London, about 18 miles from Sundridge.
Jobs for sand mastic in TN14 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on Church Road, Chapmans Road and Main Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out sand mastic in Brasted (1 mile west), Chipstead (1 mile north-east), Bessels Green (1 mile east), Brasted Chart (1 mile south-west) and Chevening (2 miles north). Further out, we also cover Dartford (12 miles north), Sevenoaks (3 miles east), Royal Tunbridge Wells (12 miles south-east), Gravesend (15 miles north-east), Tonbridge (9 miles south-east) and Northfleet (14 miles north-east).
Near you in Sundridge
In Sundridge, that means homes and buildings near The White Hart pub, Montreal Park and Trinity School, among other places. For rail, the closest station is Dunton Green station, about 2.4 miles north-east of the centre. Nearby you’ll also find Sevenoaks Museum (3 miles east) and Sevenoaks Hospital (3 miles east). The countryside around Sundridge includes Betsom's Hill and Dryhill Nature Reserve.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Damaged stone surrounds
- Sashes that need overhauling
- Cracked or broken glass
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before booking.
Surfaces we seal
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
What the job involves on each surface
Timber door frames
Round a period front door, sand mastic gives the right look.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Common questions in Sundridge
Do you cover Sundridge for sand mastic?
Yes. We work across London and the South East, and Sundridge is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Do you work for landlords with property near Dunton Green station?
Yes. We work for landlords and letting agents as well as householders. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. The old silicone has to come out completely so the mastic beds in well.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Places near Sundridge
Other services in Sundridge
For landlords and businesses
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Why act early in Sundridge
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around Sundridge, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What you get with us
- 20+ years of sealant experience
- Trusted Arbo and Everbuild sealants
- Full insurance on every job
- Rated 4.9 stars on Google
Take a look at what affects the cost or customer reviews.