Kent · England
Throwley Sand Mastic
Window and door surrounds in Throwley need attention? We cut out the old, prepare the joints and apply the right sealant.
- Wind and rain getting in round a sash window
- Crumbling sand mastic round a window
- Old cement repairs round a window that have failed
Sand mastic in Throwley
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. If you have gaps between timber frames and stone or brick and old sand mastic that has cracked, crumbled or fallen out, we can help, whatever the surface.
Somewhere as small as Throwley, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
Our work is backed for twelve months, in Throwley and everywhere else we cover.
- Where
- Throwley (ME13)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Throwley homes and the weather
With historic houses such as Belmont House and Gardens (about 0.6 miles north-west) nearby, there’s older building stock in the area around Throwley as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Faversham station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Throwley is about 4 miles south of Faversham, in Kent. Wherever you are in the ME13 postcode area, our applicators can take on sand mastic. We cover 922 towns and villages across Kent, large and small. We also work in Chelmsford, about 36 miles from Throwley.
All of ME13 is covered for sand mastic. If you are just outside Throwley, we cover Throwley Forstal (1 mile south), Sheldwich (1 mile north-east), Badlesmere (1 mile east), Sheldwich Lees (1 mile east) and Eastling (2 miles north-west). Further out, we also cover Maidstone (14 miles west), Ashford (9 miles south), Canterbury (10 miles east), Sittingbourne (7 miles north-west), Whitstable (10 miles north-east) and Faversham (4 miles north).
Near you in Throwley
Throwley’s nearest station is Faversham station, roughly 3.6 miles north-east. A little further out are Newnham Castle (2.7 miles north-west).
What happens on the day
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes a few hours per window, depending on the condition of the joints in most cases. For a village or hamlet like Throwley, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
Ask for a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
Related advice
When it isn’t the sealant
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- Cracked or broken glass
- Sashes that need overhauling
- Damaged stone surrounds
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before you book.
Joints and surfaces we work on
- Tenement windows
- Stone surrounds
- Brick reveals
- Timber door frames
- Sash and case windows
- Period & listed homes
Landlords, agents and businesses in Throwley
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Go gently near the mastic when preparing windows
- Do not paint over the new mastic
- Ask a joiner to look at soft timber first
- Renew mastic before redecorating the windows
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
More services for Throwley
Why deal with it now?
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. In a small place like Throwley, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
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. Call for a quick quote and we’ll explain what it covers.
Why book with us
- 20+ years of sealant experience
- We never seal over old sealant
- ARBOMaster approved applicator
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced or our reviews.
Throwley questions
Will you come out to Throwley?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Faversham station?
Yes. We work for landlords and agents as well as householders. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Where do you work from?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
How do I get a quote for sand mastic in Throwley?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Are you fully insured?
Yes. We’re fully insured.
Is sand mastic better than silicone for my windows?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant, and we will explain why.
What we are called out for in Throwley
Timber swells and shrinks with the weather. That movement opens up the mastic joint little by little.
Signs it’s time to call us include:
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
If you live in an older home near Church of St Michael and All Angels, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Which sealant they’ll use, and why
- How the colour is chosen
- Whether they’re fully insured
- What happens if they find a problem under the old sealant