Kent · England
Sand mastic for sash & case windows in Addington, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Addington, with a one-year guarantee on every job. Call for a quick quote.
- Draughty sash windows at the surround
- Patchy fillers round a sash window
- Gaps between timber frames and stone or brick
How the job changes by surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
How we handle sand mastic in Addington
Sand mastic doesn’t last for ever and gaps open up round the frame. We rake it out and renew it and tidies the surround. If you have weathered mastic on the most exposed windows and cracked mastic round a front door frame, we can help, whatever the surface.
In a village or hamlet like Addington, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
A 12-month guarantee comes as standard.
- Where
- Addington (ME19)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Addington
Do you cover smaller places like Addington?
Yes, Addington is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near West Malling station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Does someone need to be in?
That depends on where the joints are. For work indoors, someone needs to let us in.
How do I get a quote for sand mastic in Addington?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or send us an email with a short description of the job.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Addington.
How long does sand mastic take to go off?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
DIY sealant or a professional job?
What a professional job adds is preparation and the right 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.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
What sealant work cannot fix
We’ll always be straight with you, so here’s what sealant cannot fix:
- Decayed frames that need repair
- Crumbling stone or brickwork round the window
- Broken panes
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Brick reveals
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Go gently near the mastic when preparing windows
- Don’t run silicone over sand mastic
- Ask us before painting near the mastic
- Make sure water runs off the sill
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
What sand mastic looks like in Addington
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Old Soar Manor (about 3.9 miles south-west) nearby, there’s older building stock in the area around Addington as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to West Malling station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For an older house near a landmark such as Church of St Margaret, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Offham Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Addington is about 7 miles north-west of Maidstone, in Kent. If you need sand mastic in Addington, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Kent from our Crawley base, Addington included. 922 places in Kent are on our list, from the larger towns to small villages. We also work in London, around 25 miles away.
Jobs for sand mastic in ME19 is quoted and booked the same way as anywhere else. Whether your property is on London Road, The Links and Trottiscliffe Road or anywhere close by, our applicators can take on the job. We also cover Ryarsh (1 mile north-east), Trottiscliffe (1 mile north-west), Vigo Village (2 miles north-west), Culverstone Green (3 miles north-west) and Harvel (3 miles north). Within a short drive, we also cover Maidstone (7 miles south-east), Sittingbourne (15 miles east), Dartford (12 miles north-west), Sevenoaks (9 miles west), Royal Tunbridge Wells (13 miles south-west) and Gravesend (9 miles north).
Near you in Addington
Locally, jobs take us to homes and businesses close to The Angel Inn, The Malling School and Manor Park Country Park and the streets around them. The closest station to Addington is West Malling station, roughly 1.8 miles south-east. Nearby you will also find Coldrum Long Barrow (1.2 miles north) and Leybourne Castle (1.7 miles east).
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a single window, longer for several and we leave things clean and tidy. Somewhere as small as Addington, 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.
- 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
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
Ask for a quote
Need a quote? Please call 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before we start.
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Landlords, agents and businesses in Addington
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Also near Addington
Other services in Addington
What affects the quote in Addington
The price is agreed before any work begins. It’s based on:
- How much there is to do
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
- The type of sealant required
What you pay reflects the work, not guesswork. That is why we ask about the job first and give you a clear quote before we start.
Helping us quote
Before you ask for a quote, have a think about:
- How we’d reach the joints
- Photos by email, if that’s easy
- Where the job is, and your postcode
- The rough size of the job
For sand mastic in Addington, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.