Kent · England
Clap Hill Sand Mastic
Problem with your window and door surrounds in Clap Hill? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
- Cracked mastic round a front door frame
Looking after it afterwards
To keep the joints looking good and working properly:
- Take care around the mastic when scraping paint
- Get any rot dealt with first
- Keep modern sealant off the mastic
- Renew mastic before redecorating the windows
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
About our sand mastic in Clap Hill
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, applied by hand. On period homes, it looks right where silicone wouldn’t. If you are dealing with crumbling sand mastic round a window and cracked mastic round a front door frame, we can put it right.
Homes in small places like Clap Hill 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.
All of our work is guaranteed for twelve months, in Clap Hill and everywhere else we cover.
- Where
- Clap Hill (TN25)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
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.
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Common questions in Clap Hill
Is Clap Hill in your area for sand mastic?
Yes. We work across London and the South East, and Clap Hill is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we’ll send you a clear quote.
Do you work for landlords with property near Ham Street station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
How long will you be here?
Most jobs take a few hours per window, depending on the condition of the joints, including preparation and clearing up. Your quote will say how long we expect yours to take.
How do I get a quote for sand mastic in Clap Hill?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we’ll talk you through it.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Nearby places to Clap Hill
Other services in Clap Hill
What affects the cost of sand mastic
We quote each job individually. These are the things that affect it:
- The number and length of the joints
- When we can work, for business premises
- How many areas need sealing
- Access and height
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Any access issues, like height or stairs
- A few pictures by email, if you can
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Frames and glazing around Clap Hill
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Westenhanger Castle (about 4.1 miles east) nearby, there’s older building stock in the area around Clap Hill as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For site and facilities teams at buildings such as Aldington Primary School, the mastic around its windows and doors needs looking after like any other building’s. Westenhanger Castle, about 4.1 miles east, is one of the historic houses in the wider area around Clap Hill.
Clap Hill is about 4 miles south-east of Ashford, in Kent. For sand mastic in and around Clap Hill, please ring 0345 464 0079 or drop us an email for a quick quote. We cover Kent from our Crawley base, Clap Hill included. Across Kent, we cover 922 places, and Clap Hill is one of them. For nearby work, see our Chelmsford page (48 miles or so).
All of TN25 is within our area for sand mastic, from the main roads to the quietest streets. Other places close to Clap Hill include Aldington (1 mile south-east), Stonestreet Green (1 mile east), Bonnington (1 mile south-west), Aldington Frith (1 mile west) and Postling Green (1 mile south-east). Further out, we also cover Ashford (4 miles north-west), Canterbury (14 miles north-east), Folkestone (10 miles east), Faversham (15 miles north), Hythe (6 miles east) and Preston (15 miles north).
What’s near Clap Hill
Typical jobs here are in homes near Poulton Wood and Walnut Tree Inn and the streets around them. The nearest railway station is Ham Street station, roughly 4.1 miles south-west of the centre. Other landmarks nearby include Lympne Castle (4.1 miles south-east) and William Harvey Hospital (3.3 miles north). Open spaces near Clap Hill include Hatch Park.
Common problems we fix in Clap Hill
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint, and they normally need raking out.
Most people get in touch when they notice one of these:
- Gaps where the frame meets the masonry
- A silicone bead on a sash window that spoils the look
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
Rented homes near Ham Street station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
What to look for in a quote
- Whether they’re fully insured
- What happens if they find a problem under the old sealant
- When the joint can take water or movement
- What guarantee comes with the work
Leave it or put it right?
If you’re redecorating, renew the mastic first. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. Older cottages and farmhouses around Clap Hill can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Why us?
- 180+ five-star Google reviews
- We are fully insured
- Trusted Arbo and Everbuild sealants
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at our cost guide and what customers say.
What sealant work cannot fix
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Clap Hill
- Stone surrounds
- Period & listed homes
- Tenement windows
- Sash and case windows
- Timber door frames
- Brick reveals
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It generally takes anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Clap Hill, 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.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
How to prepare
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Let us know about stairs, lifts or work at height
Get a quote
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details and send photos if you have them.