Medway · England
Sand Mastic in Kemsley Street
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Kemsley Street. Fully insured, ARBOMaster approved and guaranteed for a year.
- Silicone on a period window that looks wrong
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic round period door frames that has failed
Sand mastic for homes and businesses in Kemsley Street
Silicone on a period window often looks wrong and is not always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on timber door frames, brick reveals and stone surrounds, and common reasons people get in touch are silicone on a period window that looks wrong and open joints round the window box.
Around Kemsley Street, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Location
- Kemsley Street (ME7)
- Wider area
- Medway
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Like-for-like sand mastic is normally favoured.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Why deal with it now?
New mastic over crumbling mastic won’t hold. Raking out and preparing the joint gives it a sound base so the new work lasts. Around Kemsley Street, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Kemsley Street clients choose us
- One-year guarantee on every job
- ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
- Arbo and Everbuild products
Signs you need sand mastic in Kemsley Street
Most of it is simply age. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
People generally contact us after spotting one of these:
- Failed mastic on an exposed elevation
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
In the older streets around Church of St Peter, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before booking anyone
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- Who turns up on the day
- How the colour is chosen
Kemsley 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.
Schools such as Deanwood Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Rainham (Kent) station, any sash windows need sound mastic to keep draughts and rain out.
Kemsley Street is about 3 miles south of Gillingham, in Medway. Every kind of property in Kemsley Street can book us for sand mastic. The work is guaranteed for a year. Kemsley Street is one of 68 towns and villages in Medway we cover. Our Chelmsford page covers work nearby, about 28 miles away.
All of ME7 is within our area for sand mastic, from the main roads to the quietest streets. Other places close to Kemsley Street include Bredhurst (1 mile west), Scragged Oak (1 mile south), Dunn Street (1 mile south-west), Park Wood (1 mile north-east) and Lower Cox Street (1 mile south-east). Within a short drive, we also cover Gillingham (3 miles north), Chatham (3 miles north-west), Rochester (6 miles north-west), Strood (6 miles north-west), Luton (3 miles north-west) and Twydall (3 miles north).
Around Kemsley Street
In Kemsley Street, that means homes and buildings near Rainham School for Girls and Levan Strice, among other places. For rail, the closest station is Rainham (Kent) station, about 2.5 miles north-east of the centre. Well-known places in the area include KIMS hospital (3.5 miles south-west) and Allington Castle (4.3 miles south-west). For a walk, there’s Burham Down and Detling Hill.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
Looking after it afterwards
To keep the joints looking good and working properly:
- Check the mastic when you check the paintwork
- Avoid patching sand mastic with silicone
- Don’t paint over the new mastic
- Avoid heavy scraping on the mastic joint
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
What we do, step by step
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. The work usually takes a few hours for a single window, longer for several. Somewhere like Kemsley Street needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Read more
Honest limits
A few problems are outside what sealant work can do:
- Broken panes
- Masonry that needs repairing
- Sashes that need overhauling
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before you book.
Where we work in Kemsley Street
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
Also near Kemsley Street
What else we do in Kemsley Street
FAQs for Kemsley Street
Do you work for landlords with property near Rainham (Kent) 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 will give you a clear price.
Do you cover Kemsley Street for sand mastic?
Yes. We work across London and the South East, and Kemsley Street is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
How long will you be here?
That depends on the amount of work, but most jobs take a few hours for a single window, longer for several. We will tell you when we quote.
What do you need from me for a quote?
Let us know what needs doing and where, with pictures by email if possible. We’ll ask anything else we need to know.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
Where is Mr Mastic based?
We work from Crawley. We cover Kemsley Street and the rest of Medway, along with the rest of our area.
Do you have insurance?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.