Kent · England
Postling Sand Mastic
Sand mastic for Postling and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- A silicone bead on a sash window that spoils the look
- Failed mastic on an exposed elevation
- Draughts and rain around sash boxes
What we are called out for in Postling
Rain on the window surround works into any crack and pushes it out. Exposed elevations generally fail first.
Common reasons people contact us are:
- Patchy fillers round a sash window
- Gaps where the frame meets the masonry
- A silicone bead on a sash window that spoils the look
- Old sand mastic that has cracked, crumbled or fallen out
Schools such as Brockhill Park Performing Arts College are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- The length of the guarantee
- What the quote includes, VAT included or not
- When the joint can take water or movement
- Are they insured?
About our sand mastic in Postling
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We work on sash and case windows, period & listed homes and tenement windows, and the jobs we see most are open joints round the window box and draughts and rain around sash boxes.
Around Postling, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Postling (CT21)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
To keep the joints looking good and working properly:
- Renew mastic before redecorating the windows
- Do not paint over the new mastic
- Clear gutters so water doesn’t pour onto the windows
- Find out about consent before window work on a listed home
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Questions from Postling
I let a flat near Sandling station. Can you help?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is sand mastic in a coastal place like Postling any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are generally the first to need attention.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours for a single window, longer for several. We’ll tell you when we quote.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. The old silicone has to come out completely so the mastic beds in well.
Postling homes and the weather
Postling is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Church of St Mary and St Radegund include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Sandling station, any sash windows need sound mastic to keep draughts and rain out.
Postling is about 3 miles north of Hythe, in Kent. We provide sand mastic to homes and businesses in Postling and nearby, as part of our work across Kent. Postling is one of 922 places in Kent we cover. You can also see our page for Chelmsford, roughly 50 miles from Postling.
We work across CT21 for sand mastic. If you’re just outside Postling, we cover Stanford (1 mile south-west), Skeete (1 mile north), Etchinghill (1 mile east), Woodland (2 miles north) and Lyminge (2 miles north-east). Larger places within reach include Ashford (9 miles west), Canterbury (12 miles north), Dover (10 miles east), Folkestone (5 miles east), Hythe (3 miles south) and Tower Hamlets (10 miles east).
Landmarks near Postling
Around Postling, our work takes us to homes and buildings near Sandling Park, among other places. Postling’s nearest station is Sandling station, roughly 1.3 miles south of the centre. Other landmarks nearby include Elham Valley Countryside Centre And Railway Museum (2.4 miles east) and Saltwood Castle (2.1 miles south-east). For a walk, there’s Tolsford Hill.
What we do, step by step
Before we leave, we go over the finished joints with you. The visit itself generally takes anything from a few hours to a full day, depending on how many windows, depending on how much there is to do. For a village or hamlet like Postling, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- Let us know about stairs, lifts or work at height
Get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Read more
Surface by surface
Period and listed homes
Period homes look their best with traditional materials, and sand mastic is one of them.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Why act early in Postling
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. Around Postling, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
Why Postling clients choose us
- Neat joints and a tidy finish
- Every job guaranteed for a year
- Domestic, commercial and hotel work
- Approved under the ARBOMaster scheme
Read what affects the cost or our reviews.
What sealant work can’t fix
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Sashes that rattle, stick or will not open
- Masonry that needs repairing
- Broken panes
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Postling
- Tenement windows
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Timber door frames