Kent · England
Sand Mastic in Walter's Green
Professional sand mastic in and around Walter's Green, with old sealant always removed completely.
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
About our sand mastic in Walter's Green
We renew sand mastic around sash windows and doors set in stone or brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We work on tenement windows, sash and case windows and timber door frames, and common reasons people get in touch are mastic dropping out of the joint and mastic worn away on windows facing the weather.
In a village or hamlet like Walter's Green, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
Big or small, it’s backed by our one-year guarantee.
- Place
- Walter's Green (TN11)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
The process
We keep the work tidy and contained to the area we are working on, so you can get on with your day. Expect the work to take a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. Somewhere as small as Walter's Green, access is often the only tricky part. 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.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
Ask for a quote
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand.
Read more
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep modern sealant off the mastic
- Renew mastic before redecorating the windows
- Inspect the joints round the windows every year or so
- Ask a joiner to look at soft timber first
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
Do you need sand mastic in Walter's Green?
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Most people get in touch after spotting something like this:
- Draughty sash windows at the surround
- Gaps round a timber door in stone or brick
- Mastic that needs renewing before redecorating
- Modern sealant on a period surround
If you live in an older home near Church of St Peter, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before booking
- Whether you can choose the colour
- The length of the guarantee
- How much experience the applicator has
- Whether the sealant suits the joint
Why deal with it now?
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Around Walter's Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
What you get with us
- An ARBOMaster approved applicator
- We leave the area clean and tidy
- We never seal over old sealant
- Anti-fungal sanitary silicone in wet areas
Landlord and commercial work in Walter's Green
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Walter's Green: your questions answered
I let a flat near Ashurst Kent station. Can you help?
Yes. We work for landlords and letting agents as well as householders. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Is Walter's Green within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we are using and why.
Where do you work from?
We’re based in Crawley, and we work across South East England, London and Scotland.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before we start.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will advise.
Is consent needed for window work on a listed home?
Your local planning authority is the one to ask. They decide whether consent is needed for work to your windows.
What the job involves on each surface
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Should I try it myself first?
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.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What sand mastic looks like in Walter's Green
With historic houses such as Penshurst Place (about 2.1 miles north-east) nearby, there’s older building stock in the area around Walter's Green as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Ashurst Kent station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like Fordcombe Church of England Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Walter's Green is about 5 miles west of Royal Tunbridge Wells, in Kent. Every kind of property in Walter's Green can book us for sand mastic. Every job comes with our one-year guarantee. Walter's Green is one of 922 places in Kent where we work for sand mastic. You can also see our page for Crawley, roughly 15 miles from Walter's Green.
Our applicators cover all of TN11 for sand mastic. If you are just outside Walter's Green, we cover Fordcombe (1 mile south-east), Teasley Mead (1 mile south-west), Ashurst (1 mile south), Stone Cross (1 mile south-east) and Chiddingstone Hoath (1 mile north-west). We also work in nearby towns such as Sevenoaks (9 miles north), Royal Tunbridge Wells (5 miles east), Tonbridge (6 miles north-east), Kings Hill (14 miles north-east), Paddock Wood (10 miles east) and Southborough (4 miles east).
What’s near Walter's Green
Typical jobs here are in homes near Bottle House Inn. For rail, the closest station is Ashurst Kent station, about 1.3 miles south. Other landmarks nearby include Chiddingstone Castle (2.8 miles north) and Kent and Sussex Hospital (4.3 miles east). Green spaces nearby include Broadwater Warren RSPB Reserve.