Kent · England
Sand mastic for sash & case windows in Kingston, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Kingston. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Open joints round the window box
- Draughty sash windows at the surround
- Tired mastic found when preparing windows for paint
About our sand mastic in Kingston
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, applied by hand. On older homes, it suits the building far better than silicone. We work on brick reveals, sash and case windows and timber door frames, and common reasons people get in touch are cement or filler used on old window joints that has cracked and old sand mastic that has cracked, crumbled or fallen out.
Homes in small places like Kingston 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.
Your job is guaranteed for a year, as with all our work.
- Where
- Kingston (CT4)
- Wider area
- Kent
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work can’t fix
We won’t take on work that won’t last, so these are the limits:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Brick reveals
- Tenement windows
- Period & listed homes
- Sash and case windows
For landlords and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
We also work for property managers and facilities teams in Kingston and across Kent. Several sites can go on one quote.
Common problems we fix in Kingston
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
Keep an eye out for these signs:
- Mastic worn away on windows facing the weather
- Cracked mastic round a front door frame
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
In the older streets around Church of St Giles, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Which colour the sealant will be
- What happens if the job turns out different
- Are they insured?
- Whether VAT is included
What sand mastic looks like in Kingston
Historic houses like Goodnestone Park (about 3.8 miles north-east) are a reminder that the area around Kingston has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
Rented homes near Adisham station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about. Schools such as Barham Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Kingston is about 5 miles south-east of Canterbury, in Kent. Our applicators cover sand mastic for homeowners, landlords and businesses in Kingston and the surrounding area, as part of our work across Kent. Kingston is one of 922 places in Kent we cover for sand mastic. Chelmsford is on our list too, around 46 miles away.
We work across the CT4 postcode area for sand mastic. Streets in the area include The Street, Church Lane and Covet Lane, and we cover them all. If you’re just outside Kingston, we cover Out Elmstead (1 mile south-east), Barham (1 mile south-east), Marley (1 mile south-west), Bishopsbourne (1 mile north-west) and Derringstone (1 mile south). Further out, we also cover Ashford (13 miles south-west), Canterbury (5 miles north-west), Margate (15 miles north-east), Dover (9 miles south-east), Folkestone (9 miles south) and Ramsgate (14 miles north-east).
Landmarks near Kingston
Locally, jobs take us to homes and businesses close to Black Robin Public House and Jumping Downs. Kingston’s nearest station is Adisham station, roughly 2.7 miles north-east. Other landmarks nearby include Kent and Canterbury Hospital (4.2 miles north-west).
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- The type of sealant required
- Whether there’s mould to deal with
- Access and height
- The size of the job
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
When you call or email, it’s useful to know:
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
Why it’s worth doing now in Kingston
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around Kingston, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, 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.
What you get with us
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
- Full insurance on every job
- ARBOMaster approved applicator
Take a look at our cost guide and customer reviews.
Questions from Kingston
Do you work for landlords with property near Adisham station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Kingston?
Yes. Kingston is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first.
How do I get a quote for sand mastic in Kingston?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
How long does sand mastic take to harden?
Not straight away. The skin forms first, and the full set comes later, and we will tell you what to expect.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What happens on the day
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and clear up. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere like Kingston needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Tell us about any water getting in
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Advice
Also near Kingston
More services for Kingston
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Don’t run silicone over sand mastic
- Avoid heavy scraping on the mastic joint
- Renew mastic before redecorating the windows
- Ask us before painting near the mastic
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.