Medway · England
Sand mastic for sash & case windows in Chattenden, Medway
Professional sand mastic in and around Chattenden, with old sealant always removed completely.
- Modern sealant on a period surround
- Crumbling sand mastic round a window
- Mastic round period door frames that has failed
How we handle sand mastic in Chattenden
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. If you have silicone on a period window that looks wrong and old sand mastic that has cracked, crumbled or fallen out, we can put it right.
In a village or hamlet like Chattenden, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Where
- Chattenden (ME3)
- Region
- Medway
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around Chattenden
Chattenden is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. 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.
Letting a property close to Strood station? Then any sash windows need sound mastic to keep draughts and rain out. In the older streets around Bishop Gundulph Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Chattenden Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Chattenden is about 2 miles north-east of Rochester, in Medway. We provide sand mastic to householders, landlords and businesses in Chattenden, as part of our work across Medway. We cover 68 towns and villages across Medway, from the larger towns to small villages. There’s also a page for Chelmsford, about 22 miles away.
Jobs for sand mastic in ME3 works the same way as everywhere else we cover. You’ll find streets such as Songbird Crescent, Sparrow Drive and Main Road, all of which we cover. If you are just outside Chattenden, we cover Lower Upnor (1 mile south), Upper Upnor (1 mile south), Wainscott (1 mile south-west), Hoo St Werburgh (1 mile east) and Cooling Street (2 miles north-west). We also work in nearby towns such as Gillingham (4 miles south-east), Chatham (4 miles south), Rainham (5 miles south-east), Strood (3 miles south-west), Luton (3 miles south) and Park Wood (6 miles south-east).
Local landmarks in Chattenden
Typical jobs here are in homes near The Pier pub, The Hundred of Hoo Academy and Lower Lines Park, among other places. The closest station to Chattenden is Strood station, about 2.1 miles south-west of the centre. Other landmarks nearby include Pentagon Shopping Centre (2.5 miles south) and Upnor Castle (0.9 miles south). For a walk, there’s Gad's Hill and Rede Common.
Also near Chattenden
Other services in Chattenden
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we will tell you before work begins. Sealant won’t put right:
- Whether work needs listed building consent
- Cracked or broken glass
- Timber that has rotted
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
What we seal
- Stone surrounds
- Period & listed homes
- Brick reveals
- Sash and case windows
- Timber door frames
- Tenement windows
Common questions in Chattenden
Can you help a landlord with a rental near Strood station?
Yes. We work for landlords and agents as well as homeowners. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Will you come out to Chattenden?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with the work?
All our work has a 12-month guarantee.
How long does sand mastic take?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer, and we’ll tell you how long to expect.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
What does sand mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Are you fully insured?
Yes, we’re fully insured.
Can old silicone round a sash window be swapped for sand mastic?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Plan mastic work ahead of painting
- Don’t run silicone over sand mastic
- Go gently near the mastic when preparing windows
- Ask the planning authority about consent for listed or conservation-area homes
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.
How we quote for sand mastic
Your quote is based on your job. We look at:
- The old material and how stubborn it is
- Any working-time requirements on site
- The type of sealant required
- Any mould that needs treating
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
- If someone has resealed it before
Want a quote for sand mastic? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours for a single window, longer for several. In a small place like Chattenden, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
Before we arrive
- Let us know about earlier repairs to the joints
- Clear items away from the joints we are working on
- Mention any tricky access
Get a quote
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
Related advice
What happens if it’s left?
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in, and renewing the mastic closes them. Where a wall is exposed, as many are in small places like Chattenden, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- Rated 4.9 stars on Google
- Neat joints and a tidy finish
Read what affects the cost or what customers say.
How the job changes by surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.