Kent · England
Sand mastic for sash & case windows in Brook, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Brook. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Mastic that needs renewing before redecorating
- Draughts and rain around sash boxes
- A silicone bead on a sash window that spoils the look
Aftercare tips
So the new joints stay in good condition:
- Check with your local planning authority if your home is listed
- Get any rot dealt with first
- Ask us before painting near the mastic
- Inspect the joints round the windows every year or so
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around 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.
Sand mastic in Brook
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. We’re often asked to deal with draughts and rain around sash boxes and patchy fillers round a sash window, on period & listed homes, brick reveals and sash and case windows.
Homes in small places like Brook often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee.
- Place
- Brook (TN25)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Brook
You’ll get a clear quote before we start. It’s based on:
- How many rooms, windows or areas are involved
- Access and height
- Which sealant suits the joint
- The old material and how stubborn it is
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What to tell us for a quote
What to tell us when you ask for a quote:
- Any previous sealing or DIY work
- The rough size of the job
- Where the property is
- Pictures of the joints, sent by email
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Brook homes and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in. Managing a site like Brook Community Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Wye station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Brook is about 4 miles east of Ashford, in Kent. From the centre of Brook to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent, large and small. You can also see our page for Chelmsford, roughly 45 miles from Brook.
Here we cover the TN25 postcode area for sand mastic. Whether your property is on The Street, Troy Town Lane and Stonebridge or a nearby road, our applicators can take on the job. Nearby, we also carry out sand mastic in Folly Town (1 mile east), Wye (2 miles north-west), Hinxhill (2 miles south-west), Hastingleigh (2 miles east) and Hassell Street (2 miles north-east). Larger places within reach include Ashford (4 miles west), Canterbury (10 miles north-east), Dover (15 miles east), Folkestone (11 miles south-east), Whitstable (14 miles north) and Faversham (11 miles north).
Local landmarks in Brook
Locally, jobs take us to homes and businesses close to Wye School. Brook’s nearest station is Wye station, roughly 2 miles north-west of the centre. A little further out are William Harvey Hospital (2.4 miles south-west) and County Square (3.9 miles west). For a walk, there’s Hatch Park.
Different surfaces, different methods
Stone surrounds
Old stone surrounds are often uneven, so the gap isn’t the same all the way round. Sand mastic is shaped by hand to suit.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Questions from Brook
Will you come out to Brook?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Wye station. Can you help?
Yes. We work for landlords and agents as well as homeowners. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We will tell you what to expect for your job.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How much does sand mastic cost in Brook?
We don’t 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.
How long does sand mastic take?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer.
Do you guarantee sand mastic work?
Every job comes with our one-year guarantee.
Where are you based?
We work from Crawley. We cover Brook and the rest of Kent.
What we do, step by step
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a single window, longer for several. In a small place like Brook, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Let us know about parking restrictions
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
Every job is quoted individually. Simply phone 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Read more
For landlords and businesses
We work for letting agents and landlords as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
We also work for property managers and facilities teams. Several sites can be quoted together, and we are fully insured for the work.
What happens if it’s left?
If you’re redecorating, renew the mastic first. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Brook, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- A 12-month guarantee on all work
- We never seal over old sealant
- We’re fully insured
- An ARBOMaster approved applicator