Kent · England
Sand Mastic in Hawthorn
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Hawthorn and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
- Gaps between timber frames and stone or brick
About our sand mastic in Hawthorn
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We work on period & listed homes, timber door frames and sash and case windows, and people most often call us about mastic worn away on windows facing the weather and mastic round period door frames that has failed.
Around Hawthorn, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
All of our work is guaranteed for twelve months.
- Place
- Hawthorn (CT6, CT3)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of sand mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any mould that needs treating
- The number of rooms or windows
- Which sealant suits the joint
- Working hours on commercial sites
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or email us.
What we need to know
To make quoting easier, let us know:
- A few pictures by email, if you can
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Work for landlords, hotels and businesses
Letting agents and landlords in Hawthorn can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Should I try it myself first?
If you’re 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 doesn’t work out, we can still put it right.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How the job changes by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we will confirm access.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Timber door frames
- Tenement windows
- Brick reveals
- Stone surrounds
- Period & listed homes
- Sash and case windows
Why act early in Hawthorn
If you’re redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps, and the new mastic is traditionally left unpainted. In a small place like Hawthorn, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Why Hawthorn clients choose us
- Fully insured
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
- Experience in homes, commercial sites and hotels
What happens on the day
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before work begins. The work usually takes anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Hawthorn, 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.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll take it from there.
Advice
Towns and villages near Hawthorn
Other services in Hawthorn
Hawthorn homes and the weather
Hawthorn is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Herne Bay station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you live in an older home near Church of St Mary the Virgin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as Reculver Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Hawthorn is about 2 miles east of Herne Bay, in Kent. If you need sand mastic in Hawthorn, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Kent from our Crawley base, Hawthorn included. Hawthorn is one of 922 places in Kent where we work for sand mastic. There’s also a page for Chelmsford, roughly 39 miles from Hawthorn.
All of CT6 and CT3 is within our area for sand mastic. Local streets include Campion Avenue, Sweechbridge Road and Heart in Hand Road. Hawthorn is on the A299, so it’s easy for us to get to with everything needed for sand mastic. Close by, we work in Hillborough (1 mile north-west), Highstead (1 mile south), Bishopstone (1 mile north), Broomfield (1 mile west) and Beltinge (1 mile north-west). Larger places within reach include Canterbury (7 miles south-west), Margate (9 miles east), Ramsgate (10 miles east), Broadstairs (11 miles east), Whitstable (6 miles west) and Deal (14 miles south-east).
Landmarks near Hawthorn
We work in homes and buildings around The Huntsman And Horn Public House and Bishopstone Cliffs, among other places. Hawthorn’s nearest station is Herne Bay station, about 2.4 miles west of the centre. A little further out are Whitstable and Tankerton Hospital (5.4 miles west). For a walk, there’s West Blean and Thornden Woods.
Common questions in Hawthorn
I let a flat near Herne Bay station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Does living near the coast affect sand mastic in Hawthorn?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
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. Larger jobs naturally take longer, and we’ll say how long yours will take.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Do you offer different sealant colours?
Yes. White, clear and grey are common, and other colours are available, and we agree the colour with you before we start.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or email us.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. The old silicone has to come out completely so the mastic beds in well.
Which is right for my windows, sand mastic or modern sealant?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant.