Kent · England
Sand Mastic in Chartham
Sand mastic for Chartham and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Mastic dropping out of the joint
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
FAQs for Chartham
I let a flat near Chartham station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Do you cover Chartham for sand mastic?
Yes. We work across London and the South East, and Chartham is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Where is Mr Mastic based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
How long does sand mastic take to go off?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
How we handle sand mastic in Chartham
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. We work on stone surrounds, brick reveals and tenement windows, and people most often call us about crumbling sand mastic round a window and failed mastic on an exposed elevation.
Mastic can only go onto a dry, clean joint, so window work in Chartham is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Chartham (CT4)
- Wider area
- Kent
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Where a wall is exposed, as many are in small places like Chartham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why Chartham customers choose us
- More than 20 years in sealant work
- A 12-month guarantee on all work
- ARBOMaster approved applicator
- 180+ five-star Google reviews
Read what affects the cost or what customers say.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
What we do, step by step
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 anything from a few hours to a full day, depending on how many windows. Somewhere as small as Chartham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
Getting a quote
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.
Related advice
Also near Chartham
More services for Chartham
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Cracked or broken glass
- Whether work needs listed building consent
- Masonry that needs repairing
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
- Timber door frames
- Tenement windows
Frames and glazing around Chartham
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Chartham Primary School, its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Chartham station? Then any sash windows need sound mastic to keep draughts and rain out. In the older streets around Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Chartham is about 3 miles south-west of Canterbury, in Kent. Every kind of property in Chartham is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Across Kent, we cover 922 places, and Chartham is one of them. You can also see our page for Chelmsford, about 40 miles away.
Work in CT4 works the same way as everywhere else we cover. If you need sand mastic at a property on Station Road, River Court and The Green or a nearby road, we can help. Close by, we work in Shalmsford Street (1 mile south), Mystole (1 mile south-west), Chartham Hatch (1 mile north), Garlinge Green (2 miles south) and Thanington (2 miles north-east). Within a short drive, we also cover Ashford (10 miles south-west), Canterbury (3 miles north-east), Dover (15 miles south-east), Sittingbourne (14 miles north-west), Folkestone (14 miles south-east) and Whitstable (7 miles north).
Near you in Chartham
We work in homes and buildings around No Man's Orchard and The Artichoke Inn. There’s a railway station in Chartham itself: Chartham station. Well-known places in the area include Chilham Castle (2.7 miles west) and Whitefriars Shopping Centre (3.1 miles north-east). The countryside around Chartham includes Blean Woods RSPB Reserve.
Landlord and commercial work in Chartham
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
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.
Quotes for sand mastic in Chartham
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How many areas need sealing
- The old material and how stubborn it is
- Whether the work is at height
- Any working-time requirements on site
Doing several joints on one visit usually makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
When you call or email, it’s useful to know:
- Any access issues, like height or stairs
- If someone has resealed it before
- The rough size of the job
- What’s wrong with the joints now
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, call 0345 464 0079 or drop us an email.
Looking after it afterwards
Looking after new joints is easy:
- Inspect the joints round the windows every year or so
- Get any rot dealt with first
- Find out about consent before window work on a listed home
- Do not paint over the new mastic
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.