Kent · England
Hever Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Hever and across Kent. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Old cement repairs round a window that have failed
- Draughts and rain around sash boxes
- Modern sealant on a period surround
Honest limits
We will always be straight with you, so here’s what new sealant won’t do:
- Broken panes
- Sash cords, weights and draught-proofing of the sashes
- Crumbling stone or brickwork round the window
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Hever
- Sash and case windows
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows
How we handle sand mastic in Hever
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. Typical jobs include gaps between timber frames and stone or brick and wind and rain getting in round a sash window, on timber door frames, tenement windows and period & listed homes.
Homes in small places like Hever often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
There’s a 12-month guarantee on every job.
- Place
- Hever (TN8)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What we do, step by step
On the day, we start by going over the job with you, so you know exactly what we’re doing. Surfaces next to the work are protected before work begins. Most jobs take a few hours for a single window, longer for several. For a village or hamlet like Hever, the journey is planned in advance: 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 check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Advice
Hever: your questions answered
Is Hever within the area you cover?
Yes, Hever is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do sand mastic in Hever?
Yes. We work across London and the South East, and Hever is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can sand mastic be painted?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
When will the new mastic be hard?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does the job take?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Larger jobs naturally take longer, and we will say how long yours will take.
Where are you based?
We work from Crawley. Our applicators cover Hever, along with the rest of our area.
Why it’s worth doing now in Hever
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Where a wall is exposed, as many are in small places like Hever, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Hever
- Over 20 years’ experience
- 4.9 on Google from 180+ five-star reviews
- ARBOMaster approved applicator
- Old sealant always removed completely
See our cost guide and what customers say.
Landlord and commercial work in Hever
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Places near Hever
Other services in Hever
Different surfaces, different methods
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
When to call us in Hever
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint, and they normally need raking out.
These are the problems we are asked about most:
- Gaps round a timber door in stone or brick
- Draughty sash windows at the surround
- Weathered mastic on the most exposed windows
- Cement or filler used on old window joints that has cracked
For landlords with property near Hever station, any sash windows need sound mastic to keep draughts and rain out.
Comparing quotes
- What insurance they hold
- Which sealant they’ll use, and why
- Which colour the sealant will be
- Is the old sealant removed completely?
Windows and doors in Hever
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. Historic houses like Hever Castle (about 0.4 miles north-east) are a reminder that the area around Hever 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.
Homes close to Church of St Peter include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Hever Church of England Voluntary Aided Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Hever is about 6 miles north-east of East Grinstead, in Kent. We carry out sand mastic for homes and businesses in Hever. Our Kent coverage runs to 922 places, Hever among them. For nearby work, see our Crawley page (14 miles or so).
Postcode districts we cover here for sand mastic: TN8. Whether your property is on Hever Road and Uckfield Lane or a nearby road, our applicators can take on the job. Other places close to Hever include Newtown (1 mile south), How Green (1 mile north), Markbeech (1 mile south), Chiddingstone Hoath (2 miles south-east) and Chiddingstone Causeway (3 miles east). We also work in nearby towns such as Sevenoaks (8 miles north-east), Royal Tunbridge Wells (8 miles south-east), Tonbridge (7 miles east), Swanley (15 miles north), Kings Hill (14 miles north-east) and Paddock Wood (12 miles east).
Near you in Hever
Locally, jobs take us to homes and businesses close to King Henry VIII pub and Chiddingstone Castle Park and Gardens, among other places. Hever’s nearest station is Hever station, about 0.5 miles west. Well-known places in the area include Haxted Watermill Museum (3.4 miles west) and Hever Castle (less than half a mile north-east).