Medway · England
Sand mastic for sash & case windows in Kingsnorth, Medway
We cover Kingsnorth for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
- Mastic worn away on windows facing the weather
Leave it or put it right?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Where a wall is exposed, as many are in small places like Kingsnorth, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why us?
- Any old sealant cut out fully, not covered over
- Domestic, commercial and hotel work
- Anti-fungal silicone where joints get wet
- Full insurance on every job
Read what affects the cost and what customers say.
Sand mastic in Kingsnorth, done properly
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. If you have gaps round a timber door in stone or brick and a silicone bead on a sash window that spoils the look, we can help, on stone surrounds, timber door frames and brick reveals alike.
Mastic can only go onto a dry, clean joint, so window work in Kingsnorth is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Kingsnorth (ME3)
- Wider area
- Medway
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Frames and glazing around Kingsnorth
Kingsnorth is within about 1 mile 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as The Hundred of Hoo Academy, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Gillingham (Kent) station, any sash windows need sound mastic to keep draughts and rain out.
Kingsnorth is about 4 miles north of Gillingham, in Medway. Homes, rented property, offices and hotels in Kingsnorth can book us for sand mastic. Every job comes with our 12-month guarantee. Across Medway, we cover 68 places, and Kingsnorth is one of them. Our Chelmsford page covers work nearby, about 22 miles away.
Jobs for sand mastic in ME3 works the same way as everywhere else we cover. That includes homes and businesses on Jetty Road and Jacob's Lane and the roads around them. If you’re just outside Kingsnorth, we cover Tunbridge Hill (1 mile north), Sharnal Street (1 mile north-west), Fenn Street (1 mile north-west), Hoo St Werburgh (2 miles west) and High Halstow (2 miles north-west). Within a short drive, we also cover Gillingham (4 miles south), Chatham (6 miles south-west), Rochester (5 miles south-west), Rainham (5 miles south), Strood (6 miles south-west) and Luton (5 miles south-west).
What’s near Kingsnorth
The nearest railway station is Gillingham (Kent) station, about 3.6 miles south-west. A little further out are Medway Maritime Hospital (4.2 miles south-west) and Upnor Castle (3.5 miles south-west). Not far away are Bishop Saltings.
What we do, step by step
There is not much for you to do on the day. 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. For a village or hamlet like Kingsnorth, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Keep children and pets away from the work area
- Mention any parking rules near the property
- Clear items away from the joints we’re working on
Ask for a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
Read more
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Avoid heavy scraping on the mastic joint
- Do not paint over the new mastic
- Inspect the joints round the windows every year or so
- Clear gutters so water doesn’t pour onto the windows
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Nearby places to Kingsnorth
What else we do in Kingsnorth
Landlord and commercial work in Kingsnorth
Landlords and agents in Kingsnorth can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Kingsnorth questions
Does living near the coast affect sand mastic in Kingsnorth?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
I let a flat near Gillingham (Kent) station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours per window, depending on the condition of the joints. We will tell you when we quote.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Do you have insurance?
Yes. We’re fully insured for domestic and commercial work.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access.
Should I use sand mastic or silicone?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
When something else is needed
We will always be straight with you, so here’s what sealant cannot fix:
- Putty and glazing repairs
- Decayed frames that need repair
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Kingsnorth
- Brick reveals
- Period & listed homes
- Tenement windows
- Timber door frames
- Stone surrounds
- Sash and case windows