Kent · England
Sand mastic for sash & case windows in Whitehill, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Whitehill, with a one-year guarantee on every job. Ask us for a quote.
- Gaps where the frame meets the masonry
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
Why act early in Whitehill
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Around Whitehill, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Whitehill
- 4.9 on Google from 180+ five-star reviews
- A 12-month guarantee on all work
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
See what affects the cost and what customers say.
Sand mastic in Whitehill, done properly
Sand mastic doesn’t last for ever, leaving gaps round the window. We rake it out and renew it so the surround looks right again. We work on tenement windows, sash and case windows and brick reveals, and common reasons people get in touch are open joints round the window box and tired mastic found when preparing windows for paint.
Somewhere as small as Whitehill, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Whitehill (ME13)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Putty and glazing repairs
- Crumbling stone or brickwork round the window
- Planning or listed building consent (your local planning authority decides)
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Whitehill
- Period & listed homes
- Brick reveals
- Stone surrounds
- Sash and case windows
- Tenement windows
- Timber door frames
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a single window, longer for several, and the area is left clean. Somewhere like Whitehill needs a little journey planning: 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 start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Clear items away from the joints we are working on
How to get a quote
Getting a quote is simple: let us know what needs doing and where. A few photos by email make the job easier to understand.
Related advice
Also in Whitehill
FAQs for Whitehill
Will you come out to Whitehill?
Yes, Whitehill is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Faversham station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Is it possible to take out silicone and use sand mastic instead?
In most cases. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Where are you based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
When will the new mastic be hard?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Are you fully insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
What we’re called out for in Whitehill
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
These are the problems we are asked about most:
- Wind and rain getting in round a sash window
- Window mastic to renew ahead of painting
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
Rented homes near Faversham station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- Which colour the sealant will be
- Is the old sealant removed completely?
- Whether VAT is included
- How long the guarantee is
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Get any rot dealt with first
- Look over the window mastic once a year
- Ask us before painting near the mastic
- Keep modern sealant off the mastic
Leave the new mastic alone while it firms up. It skins over quickly but needs longer to fully harden.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
Sand mastic in Whitehill: local notes
With historic houses such as Belmont House and Gardens (about 2.4 miles south-west) nearby, there’s older building stock in the area around Whitehill as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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 Ospringe Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of St Peter and St Paul, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Whitehill is about 1 mile south-west of Faversham, in Kent. Whether you’re in the middle of Whitehill or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. 922 places in Kent are on our list. Our Chelmsford page covers work nearby, about 35 miles away.
Work in ME13 is quoted and booked the same way as anywhere else. Whether your property is on Brogdale Road and Eastling Road or a nearby road, we can help. If you are just outside Whitehill, we cover Brogdale (1 mile west), Ospringe (1 mile north), Preston (1 mile north-east), Faversham (1 mile north-east) and Davington (1 mile north). Larger places within reach include Maidstone (15 miles west), Ashford (11 miles south), Canterbury (9 miles east), Sittingbourne (7 miles north-west), Whitstable (8 miles north-east) and Herne Bay (12 miles east).
What’s near Whitehill
Typical jobs here are in homes near Maison Dieu pub and The Abbey School, among other places. For rail, the closest station is Faversham station, about 1 mile north-east. Well-known places in the area include Newnham Castle (3.4 miles west).