Kent · England
Sand Mastic in Chartway Street
Window and door surrounds in Chartway Street need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Old cement repairs round a window that have failed
- Cracked mastic round a front door frame
- Wind and rain getting in round a sash window
How the job changes by surface
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
How we handle sand mastic in Chartway Street
Across Chartway Street, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on period & listed homes, tenement windows and stone surrounds, and people most often call us about window mastic to renew ahead of painting and cracked mastic round a front door frame.
Outdoor sealant needs dry, clean surfaces, so work on frames around Chartway Street is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Every job is covered by a 12-month guarantee, wherever you are in Kent.
- Where
- Chartway Street (ME17)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Chartway Street homes and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Leeds Castle (about 2 miles north) are a reminder that the area around Chartway Street has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Kingswood Primary School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Harrietsham station, any sash windows need sound mastic to keep draughts and rain out.
Chartway Street is about 5 miles south-east of Maidstone, in Kent. For sand mastic in and around Chartway Street, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We are based in Crawley and cover Kent, Chartway Street included. Across Kent, we cover 922 places, and Chartway Street is one of them. Our London page covers work nearby (36 miles or so).
Work in ME17 works the same way as everywhere else we cover. We cover properties on Chartway Street and Workhouse Lane and the roads around them. If you’re just outside Chartway Street, we cover Kingswood (1 mile north-east), Ulcombe (1 mile south-east), Broomfield (2 miles north-east), Leeds (2 miles north) and Ashbank (2 miles north). Within a short drive, we also cover Maidstone (5 miles north-west), Ashford (12 miles south-east), Sittingbourne (10 miles north-east), Tonbridge (15 miles west), Faversham (13 miles north-east) and Kings Hill (10 miles west).
Around Chartway Street
The closest station to Chartway Street is Harrietsham station, about 3 miles north-east of the centre. Nearby you will also find Sutton Valence Castle (1 mile south-west) and KIMS hospital (5.1 miles north-west).
Also near Chartway Street
Other services in Chartway Street
What happens if it’s left?
Draughts round a sash window aren’t always the sashes. Open mastic joints round the box can let air in, and renewing the mastic closes them. Older cottages and farmhouses around Chartway Street can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on how much there is to do, how hard the old material is to remove and access to the work. We give a clear quote before we start, so you know where you stand.
Why us?
- Anti-fungal sanitary silicone in wet areas
- ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
- One-year guarantee on every job
Read our cost guide and our reviews.
The process
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes a few hours per window, depending on the condition of the joints for a typical job. Somewhere as small as Chartway Street, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
Read more
For landlords and businesses
Landlords and letting agents in Chartway Street can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Common questions in Chartway Street
Do you work for landlords with property near Harrietsham station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Can you do sand mastic in Chartway Street?
Yes, Chartway Street is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Can I choose the sealant colour?
Yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before we start.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
What does sand mastic cost?
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.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Do you do commercial work?
Yes. We can plan bigger jobs in stages to suit the site.
What we’re called out for in Chartway Street
Water gets into small cracks in the mastic and loosens it further. Exposed elevations normally fail first.
People generally contact us when they notice one of these:
- Old cement repairs round a window that have failed
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
- Failed mastic on an exposed elevation
In the older streets around St Peter's and St Paul's Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Comparing quotes
- What insurance they hold
- Is the old sealant removed completely?
- What preparation is included
- What product goes in the joint
Looking after it afterwards
To keep the joints looking good and working properly:
- Do not paint over the new mastic
- Check the mastic when you check the paintwork
- Don’t run silicone over sand mastic
- Avoid heavy scraping on the mastic joint
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.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.