Kent · England
Sand mastic for sash & case windows in South Stour, Kent
Window and door surrounds in South Stour need attention? We cut out the old, prepare the joints and apply the right sealant.
- Gaps round a timber door in stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
- Modern sealant on a period surround
About our sand mastic in South Stour
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. Typical jobs include mastic round period door frames that has failed and gaps between timber frames and stone or brick, across timber door frames, brick reveals and sash and case windows.
Somewhere as small as South Stour, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Every job is covered by our one-year guarantee.
- Location
- South Stour (TN25)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around South Stour, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
Why book with us
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
- Homes, businesses and hotels
- Fully insured
What happens on the day
When we arrive, 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 per window, depending on the condition of the joints. In a small place like South Stour, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Mention any tricky access
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job and send pictures if you have them.
Related advice
Common questions in South Stour
Can you do sand mastic in South Stour?
Yes, South Stour is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Can you help a landlord with a rental near Ashford International station?
Yes. We work for letting agents and landlords as well as householders. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
How long does sand mastic take to harden?
Not straight away. It skins first and hardens fully later, and we’ll tell you what to expect.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Can old silicone round a sash window be swapped for sand mastic?
Yes. The silicone is cut out and the joint cleaned, then point it with sand mastic.
How we quote for sand mastic
We quote each job individually. These are the things that affect it:
- How easy the joints are to reach
- The product the joint needs
- How many areas need sealing
- Working hours on commercial sites
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The rough size of the job
- Any access issues, like height or stairs
- Where the property is
- Photos by email, if that is easy
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’ll talk you through the work before giving you a price.
How the job changes by surface
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
Timber door frames
Round a period front door, sand mastic gives the right look.
What sand mastic looks like in South Stour
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. With historic houses such as Godinton House (about 4.8 miles north-west) nearby, there’s older building stock in the area around South Stour as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Ashford International station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Godinton House, about 4.8 miles north-west, is one of the historic houses in the wider area around South Stour.
South Stour is about 3 miles south-east of Ashford, in Kent. If you need sand mastic in South Stour, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Kent from our Crawley base, South Stour included. We cover 922 towns and villages across Kent, from the larger towns to small villages. For nearby work, see our Crawley page, about 47 miles away.
Work in TN25 is quoted and booked the same way as anywhere else. We also cover Mersham (1 mile north-east), Sevington (2 miles north), Hinxhill Park (2 miles north), Ridgeway (3 miles north-east) and Hinxhill (3 miles north-east). We also work in nearby towns such as Ashford (3 miles north-west), Canterbury (14 miles north-east), Folkestone (11 miles east), Faversham (14 miles north), Hythe (8 miles east) and Davington (15 miles north).
Around South Stour
Typical jobs here are in homes near Poulton Wood and the streets around them. The closest station to South Stour is Ashford International station, about 2.8 miles north-west. Nearby you will also find William Harvey Hospital (2.4 miles north) and Ashford Designer Outlet (2.3 miles north-west). Not far away are Hatch Park.
Do you need sand mastic in South Stour?
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
It’s worth asking for a quote if you see:
- Draughts and rain around sash boxes
- A silicone bead on a sash window that spoils the look
- Patchy fillers round a sash window
- Old sand mastic that has cracked, crumbled or fallen out
If you look after a building such as Finberry Primary School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- How the surfaces are prepared before sealing
- How long to leave it before use
- Whether you can choose the colour
- Is the old sealant removed completely?
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Do not run silicone over sand mastic
- Check the mastic when you check the paintwork
- Take care around the mastic when scraping paint
- Ask the planning authority about consent for listed or conservation-area homes
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.