Kent · England
Sand mastic for sash & case windows in Sissinghurst, Kent
Our applicators work in Sissinghurst on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps between timber frames and stone or brick
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
How we handle sand mastic in Sissinghurst
We work across Sissinghurst renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. If you have draughty sash windows at the surround and mastic that needs renewing before redecorating, we can help, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Sissinghurst is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Sissinghurst (TN17)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common problems we fix in Sissinghurst
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint, and they generally need raking out.
Look out for these signs:
- Patchy fillers round a sash window
- Wind and rain getting in round a sash window
- Tired mastic found when preparing windows for paint
- Gaps where the frame meets the masonry
In the older streets around Church of the Holy Trinity, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- Whether VAT is included
- Whether they seal over old material or remove it
- Whether the sealant suits the joint
- How much experience the applicator has
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. We shape it by hand to follow the stone.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Places near Sissinghurst
What else we do in Sissinghurst
FAQs for Sissinghurst
Is Sissinghurst 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.
Can you help a landlord with a rental near Staplehurst station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Which is right for my windows, sand mastic or modern sealant?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we will explain why.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we are using.
Do you offer different sealant colours?
In most cases you can choose. We will explain which colours are available.
How long does sand mastic take?
Typically it takes a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints.
What does sand mastic cost?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Aftercare tips
To keep the joints looking good and working properly:
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid patching sand mastic with silicone
- Have rotten timber repaired before new mastic goes in
- Do not paint over the new mastic
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
Why it’s worth doing now in Sissinghurst
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. Older cottages and farmhouses around Sissinghurst can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
Why book with us
- We leave the area clean and tidy
- Sanitary silicone with an anti-fungal additive in wet areas
- We’re fully insured
- 20+ years of sealant experience
Take a look at our cost guide and what customers say.
What we do, step by step
Before we leave, we go over the finished joints with you. The work normally takes anything from a few hours to a full day, depending on how many windows, depending on how much there is to do. Somewhere as small as Sissinghurst, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- On commercial sites, let us know about site rules
- Mention any tricky access
- Clear items away from the joints we’re working on
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Advice
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Frames and glazing around Sissinghurst
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Staplehurst station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Cranbrook School, the mastic around its windows and doors needs looking after like any other building’s.
Sissinghurst is about 11 miles south of Maidstone, in Kent. Whether you’re in the middle of Sissinghurst or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Kent, we cover 922 places, Sissinghurst among them. For nearby work, see our Crawley page (32 miles or so).
Jobs for sand mastic in TN17 works the same way as everywhere else we cover. Sand mastic is available to properties on The Street, Milkhouse Cottages and Cobnut Close and the roads around them. Neighbouring places we cover for sand mastic include Wilsley Pound (1 mile west), Cranbrook Common (1 mile north), Wilsley Green (1 mile south-west), Knox Bridge (2 miles north) and Colliers Green (2 miles west). Further out, we also cover Maidstone (11 miles north), Ashford (14 miles east), Royal Tunbridge Wells (13 miles west), Tonbridge (14 miles north-west), Kings Hill (13 miles north-west) and Foley Park (12 miles north).
What’s near Sissinghurst
Typical jobs here are in homes near Crane Valley and The Bull Public House. The closest station to Sissinghurst is Staplehurst station, roughly 4.3 miles north of the centre. A little further out are Sissinghurst Castle (1.1 miles east) and Benenden Hospital (3.1 miles south-east).
What sealant work cannot fix
New sealant cannot fix everything, and we will tell you before any work starts. Sealant won’t put right:
- Masonry that needs repairing
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Tenement windows
- Period & listed homes
- Brick reveals
- Stone surrounds
- Timber door frames
- Sash and case windows