East Sussex · England
Sand mastic for sash & case windows in Newbury's, East Sussex
Problem with your window and door surrounds in Newbury's? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Mastic round period door frames that has failed
- Wind and rain getting in round a sash window
- Silicone on a period window that looks wrong
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Damaged stone surrounds
- Decisions on consent for listed homes
- Decayed frames that need repair
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
What we seal
- Sash and case windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
Sand mastic in Newbury's, done properly
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 period homes, it looks right where silicone wouldn’t. If you are dealing with wind and rain getting in round a sash window and gaps between timber frames and stone or brick, we can help.
In a village or hamlet like Newbury's, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
A one-year guarantee comes as standard, so you are not left on your own once the job is done.
- Where
- Newbury's (TN5)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
For anyone letting property in or around Newbury's, several properties can be quoted together. Send us the addresses and the work at each.
What happens if it’s left?
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around Newbury's, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
- A 12-month guarantee on all work
- Anti-fungal silicone where joints get wet
Read what affects the cost or what customers say.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Sand mastic in Newbury's: local notes
Historic houses like Wadhurst Castle (about 1.5 miles south-west) are a reminder that the area around Newbury's has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Rainfall in the South East is lower than in much 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 Uplands Community College, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Wadhurst station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around Rehoboth Chapel, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Newbury's is about 5 miles south-east of Royal Tunbridge Wells, in East Sussex. Every kind of property in Newbury's is covered for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Newbury's is one of 289 places in East Sussex we cover for sand mastic. You can also see our page for Crawley, roughly 24 miles from Newbury's.
We work across the TN5 postcode area for sand mastic and the streets around it. Other places close to Newbury's include Cousley Wood (1 mile south-east), Pell Green (1 mile south-west), Wadhurst (1 mile south-west), Birchett's Green (2 miles south-east) and Shover's Green (2 miles south). Larger places within reach include Crowborough (8 miles west), Uckfield (13 miles south-west), Heathfield (9 miles south-west), Upper Horsebridge (15 miles south), Hellingly (14 miles south) and Battle (13 miles south-east).
Near you in Newbury's
Around Newbury's, our work takes us to homes and buildings near The Old Vine Public House and the streets around them. For rail, the closest station is Wadhurst station, roughly 1.9 miles west of the centre. A little further out are Ticehurst House Hospital (2.9 miles south-east) and Finchcocks Musical Museum (3.5 miles north-east). For a walk, there’s Bewl Water.
The process
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere like Newbury's 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.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- 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.
How to prepare
- Move anything stored near the joints
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
What the job involves on each surface
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
What affects the cost of sand mastic
Call for a quick quote. What matters most is:
- Mould in or behind the old joints
- How easy the joints are to reach
- The number and length of the joints
- The number of rooms or windows
Doing several joints on one visit normally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What’s wrong with the joints now
- Any access issues, like height or stairs
- Whether it has been sealed before
- The address or postcode of the job
For sand mastic in Newbury's, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Common questions in Newbury's
Can you help a landlord with a rental near Wadhurst station?
Yes. We work for landlords and letting agents as well as homeowners. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Is Newbury's in your area for sand mastic?
Yes, Newbury's is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Should I try DIY first?
You can, for simple jobs. 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.
How long does sand mastic take to go off?
Not straight away. It skins first and hardens fully later and we’ll give you an idea for your job.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.