Kent · England
Sand mastic for sash & case windows in Heart's Delight, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Heart's Delight, backed by a 12-month guarantee. Ask us for a quote.
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
Sand mastic in Heart's Delight
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. We work on timber door frames, period & listed homes and stone surrounds, and the jobs we see most are window mastic to renew ahead of painting and patchy fillers round a sash window.
Homes in small places like Heart's Delight 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.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Heart's Delight (CT4)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work cannot fix
Sealant is not the answer to every problem, and we’ll tell you before work begins. It will not solve:
- Decayed frames that need repair
- Sashes that rattle, stick or will not open
- Broken panes
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Period & listed homes
- Tenement windows
- Sash and case windows
- Brick reveals
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
If you manage several properties in or around Heart's Delight, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Surface by surface
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
Common questions in Heart's Delight
I let a flat near Snowdown station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Do you cover smaller places like Heart's Delight?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Where do you work from?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
Can I paint the new mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
Heart's Delight homes and the weather
With historic houses such as Acrise Place (about 4.4 miles south) nearby, there’s older building stock in the area around Heart's Delight as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of St John the Baptist, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Barham Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Snowdown station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Heart's Delight is about 6 miles north of Hawkinge, in Kent. Jobs in Heart's Delight get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. We cover 922 towns and villages across Kent, large and small. You can also see our page for Chelmsford, roughly 47 miles from Heart's Delight.
All of CT4 is covered for sand mastic, from the main roads to the quietest streets. Whether your property is on South Barham Road, Green Hills and Railway Hill or a nearby road, our applicators can take on the job. If you’re just outside Heart's Delight, we cover Derringstone (1 mile north-east), Barham (1 mile north-east), Gravel Castle (1 mile east), Marley (1 mile north-west) and Out Elmstead (1 mile north). We also work in nearby towns such as Ashford (13 miles west), Canterbury (6 miles north-west), Dover (8 miles south-east), Folkestone (8 miles south), Ramsgate (15 miles north-east) and Whitstable (12 miles north-west).
Near you in Heart's Delight
Around Heart's Delight, our work takes us to homes and buildings near Jumping Downs and the streets around them. For rail, the closest station is Snowdown station, about 2.9 miles east of the centre. Well-known places in the area include Kent and Canterbury Hospital (5.3 miles north-west).
What happens if it’s left?
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. Where a wall is exposed, as many are in small places like Heart's Delight, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or drop us an email and we will talk you through it.
Why us?
- Every job guaranteed for a year
- We’re fully insured
- Anti-fungal sanitary silicone in wet areas
- 180+ five-star Google reviews
Read how sealant jobs are priced and our reviews.
The process
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. In a small place like Heart's Delight, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about parking restrictions
- Mention any tricky access
Get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand.
Related advice
Places near Heart's Delight
Other services in Heart's Delight
Looking after it afterwards
Aftercare is simple:
- Ask the planning authority about consent for listed or conservation-area homes
- Leave the new mastic unpainted
- Get any rot dealt with first
- Keep modern sealant off the mastic
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.