Kent · England
Sand mastic for sash & case windows in Postling Green, Kent
We cover Postling Green for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
- Mastic worn away on windows facing the weather
About our sand mastic in Postling Green
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. If you have failed mastic on an exposed elevation and crumbling sand mastic round a window, we can put it right, on brick reveals, stone surrounds and tenement windows alike.
Around Postling Green, 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.
A one-year guarantee comes as standard.
- Where
- Postling Green (TN25)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Plan mastic work ahead of painting
- Find out about consent before window work on a listed home
- Avoid patching sand mastic with silicone
- Go gently near the mastic when preparing windows
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Nearby places to Postling Green
More services for Postling Green
Different surfaces, different methods
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we’ll confirm what’s needed.
Period and listed homes
Period homes look their best with traditional materials.
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
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.
Postling Green questions
Do you cover Postling Green for sand mastic?
Yes. Our work covers London and the South East, and Postling Green is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Will you come out to Postling Green?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
How long will you be here?
Typically it takes anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll tell you what we’re using.
Can tenants book the work?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. It normally takes a few hours for a single window, longer for several. Somewhere like Postling Green needs a little journey planning: 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.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
Ask for a quote
For sand mastic in Postling Green, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
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What affects the cost of sand mastic
There’s no set price list. What we look at:
- When we can work, for business premises
- The old material and how stubborn it is
- How many areas need sealing
- The product the joint needs
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
To help us quote quickly, please include:
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- A few photos by email, if you can
- Access, such as stairs, a lift or height
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved.
When it isn’t the sealant
We will not take on work that will not last, so here’s what sealant can’t put right:
- Timber that has rotted
- Decisions on consent for listed homes
- Cracked or broken glass
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Surfaces we seal
- Tenement windows
- Sash and case windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Brick reveals
What sand mastic looks like in Postling Green
London and the South East are among the drier parts 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 3.2 miles east) nearby, there’s older building stock in the area around Postling Green as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Westenhanger station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Martin include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
Postling Green is about 5 miles west of Hythe, in Kent. Across the TN25 area, we can carry out sand mastic at your property. 922 places in Kent are on our list, large and small. For nearby work, see our Crawley page.
Every address in TN25 is within our area for sand mastic, from the main roads to the quietest streets. Other places close to Postling Green include Aldington (1 mile north-west), Stonestreet Green (1 mile north-west), Bonnington (1 mile west), Clap Hill (1 mile north-west) and Aldington Frith (2 miles north-west). We also work in nearby towns such as Ashford (6 miles north-west), Canterbury (15 miles north), Dover (15 miles east), Folkestone (9 miles east), Hythe (5 miles east) and Tower Hamlets (15 miles east).
Landmarks near Postling Green
We work in homes and buildings around Walnut Tree Inn and Poulton Wood, among other places. The closest station to Postling Green is Westenhanger station, roughly 3.5 miles east of the centre. Nearby you will also find William Harvey Hospital (4.6 miles north-west) and Lympne Castle (2.8 miles east). Green spaces nearby include Hatch Park.
What we’re called out for in Postling Green
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
If you can see any of these, it’s time to have the joints looked at:
- Mastic that needs renewing before redecorating
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
Schools such as Aldington Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before booking
- What product goes in the joint
- Whether all the old sealant comes out first
- Whether you can choose the colour
- What guarantee comes with the work