Kent · England
Sand mastic for sash & case windows in Sheerness, Kent
Our applicators work in Sheerness on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Modern sealant on a period surround
- Failed mastic on an exposed elevation
- Patchy fillers round a sash window
Common questions in Sheerness
Will you come out to Sheerness?
Yes, Sheerness is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is sand mastic in a coastal place like Sheerness any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We will explain what to expect before we leave.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you guarantee sand mastic work?
Our 12-month guarantee applies to all our work.
How long does sand mastic take?
It depends on the size of the job, but as a guide it takes a few hours for a single window, longer for several. We will tell you when we quote.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can you replace silicone on a period window with sand mastic?
Normally, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
About our sand mastic in Sheerness
Traditional burnt sand mastic blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you have old sand mastic that has cracked, crumbled or fallen out and silicone on a period window that looks wrong, we can help.
In smaller places like Sheerness, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
Whatever the size of the job, it’s backed by our 12-month guarantee in Sheerness and across Kent.
- Location
- Sheerness (ME12)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Leave the new mastic unpainted
- Plan mastic work ahead of painting
- Ask a joiner to look at soft timber first
- Check the mastic when you check the paintwork
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
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.
The process
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to a full day, depending on how many windows. For a job in Sheerness, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Related advice
Places near Sheerness
Also in Sheerness
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- The product the joint needs
- The number of rooms or windows
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Roughly how big the job is
- If someone has resealed it before
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
What sand mastic looks like in Sheerness
Sheerness is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Parish Church of the Holy Trinity, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Sheerness-On-Sea station? Then any sash windows need sound mastic to keep draughts and rain out. Schools such as Rose Street Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Sheerness is about 7 miles north of Sittingbourne, in Kent. We provide sand mastic to householders, landlords and businesses in Sheerness and the surrounding area, as part of our work across Kent. We cover 922 towns and villages across Kent. Chelmsford is on our list too, about 24 miles from Sheerness.
Postcode districts we cover here for sand mastic: ME12. If you need sand mastic at a property on High Street, Granville Road and Millennium Way or a nearby road, we can help. Sheerness is on the A249 and A250, which makes it straightforward to reach with everything needed for sand mastic. Close by, we work in Blue Town (1 mile north-west), Halfway Houses (1 mile south-east), Queenborough (2 miles south), Rushenden (2 miles south-west) and Grain (2 miles north-west). Further out, we also cover Sittingbourne (7 miles south), Whitstable (13 miles south-east), Faversham (10 miles south-east), Davington (10 miles south-east), Foley Park (15 miles south-west) and Preston (10 miles south-east).
What’s near Sheerness
We work in homes and buildings around Oasis Academy Isle of Sheppey, Barton's Point Coastal Park and The Crown pub, among other places. There’s a railway station in Sheerness itself: Sheerness-On-Sea station. Other landmarks nearby include Rose Street Cottage of Curiosities (less than half a mile north).
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Broken panes
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Period & listed homes
- Tenement windows
- Timber door frames
- Brick reveals
- Stone surrounds
- Sash and case windows