Medway · England
Gadshill Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Gadshill, with a one-year guarantee on every job. Ask us for a quote.
- Cracked mastic round a front door frame
- Gaps where the frame meets the masonry
- Silicone on a period window that looks wrong
Sand mastic for homes and businesses in Gadshill
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. If you’re dealing with draughts and rain around sash boxes and tired mastic found when preparing windows for paint, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Gadshill is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Gadshill (ME3)
- Wider area
- Medway
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Sand mastic in Gadshill: local notes
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. With historic houses such as Temple Manor (about 1.9 miles south-east) nearby, there’s older building stock in the area around Gadshill as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near Church of St John, the joint between an old wall and a newer frame is usually the first place rain gets in. Letting a property close to Higham station? Then any sash windows need sound mastic to keep draughts and rain out. If you look after a building such as Strood Academy, its window and door frames need their mastic kept sound, just like a home’s.
Gadshill is about 2 miles north-west of Rochester, in Medway. Across the ME3 area, we cover sand mastic for homes and businesses. Gadshill is one of 68 places in Medway where we work for sand mastic. We also work in Chelmsford, about 23 miles from Gadshill.
Every address in ME3 is within our area for sand mastic. That includes homes and businesses on Copperfield Crescent, Charles Dickens Avenue and Gravesend Road and the roads around them. Other places close to Gadshill include Higham (1 mile north), Shorne Ridgeway (1 mile west), Shorne (1 mile west), Lower Higham (1 mile north) and Mockbeggar (2 miles north-east). Within a short drive, we also cover Gillingham (6 miles south-east), Chatham (5 miles south-east), Rainham (7 miles south-east), Luton (4 miles south-east), Park Wood (7 miles south-east) and Lordswood (6 miles south-east).
Near you in Gadshill
Locally, jobs take us to homes and businesses close to Rede Common, Temple School and Sir John Falstaff Public House. Gadshill’s nearest station is Higham station, roughly 1.2 miles north of the centre. A little further out are Rochester Castle (2.2 miles south-east) and French Hospital (2.4 miles south-east). Open spaces near Gadshill include Gad's Hill and Rede Common.
Gadshill questions
Do you work for landlords with property near Higham station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Is Gadshill within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
Where do you work from?
We work from Crawley. We cover Gadshill and the rest of Medway, along with the rest of our area.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will advise.
How long does sand mastic take?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer, and we’ll tell you how long to expect.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They decide whether consent is needed.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Ask us before painting near the mastic
- Find out about consent before window work on a listed home
- Keep sills and gutters clear so water drains away
- Take care around the mastic when scraping paint
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
How it works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours per window, depending on the condition of the joints. For a village or hamlet like Gadshill, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
How to get a quote
We do not publish a price list. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or drop us an email.
Advice
Why it’s worth doing now in Gadshill
If you are redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Gadshill, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and give you a clear price before work begins.
What you get with us
- Fully insured
- Every job guaranteed for a year
- Approved under the ARBOMaster scheme
- Trusted Arbo and Everbuild sealants
Nearby places to Gadshill
Also in Gadshill
Surface by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Stone surrounds
The stone is treated with care when the old mastic comes out.
What sealant work can’t fix
To be straight with you, some problems need a different trade:
- Decisions on consent for listed homes
- Sashes that need overhauling
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Tenement windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Brick reveals
- Sash and case windows
What affects the cost of sand mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- Working hours on commercial sites
- The size of the job
- The number of rooms or windows
- The type of sealant required
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
What we need to know
When you contact us, these details help:
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that is easy
- The address or postcode of the job
- Whether it has been sealed before
Want a quote for sand mastic? Please phone 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.