Medway · England
Sand Mastic in Sharnal Street
Our applicators work in Sharnal Street 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.
- Gaps round a timber door in stone or brick
- Gaps where the frame meets the masonry
- Mastic worn away on windows facing the weather
Signs you need sand mastic in Sharnal Street
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint, and they usually need raking out.
Keep an eye out for these signs:
- Cracked mastic round a front door frame
- Mastic that needs renewing before redecorating
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
If you let a flat or house near Gillingham (Kent) station, any sash windows need sound mastic to keep draughts and rain out.
Before booking anyone
- What happens if the job turns out different
- What guarantee comes with the work
- What product goes in the joint
- Who turns up on the day
Sand mastic in Sharnal Street
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on brick reveals, stone surrounds and timber door frames, and common reasons people get in touch are patchy fillers round a sash window and gaps between timber frames and stone or brick.
Outdoor sealant needs dry, clean surfaces, so work on frames around Sharnal Street is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Where
- Sharnal Street (ME3)
- Region
- Medway
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Sharnal Street
Also in Sharnal Street
Sharnal Street homes and the weather
Sharnal Street is within about 2 miles of 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Church of St Margaret include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as High Halstow Primary Academy are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Sharnal Street is about 5 miles north of Gillingham, in Medway. Wherever you are in the ME3 postcode area, our applicators can take on sand mastic. Across Medway, we cover 68 places, and Sharnal Street is one of them. For nearby work, see our Chelmsford page.
Jobs for sand mastic in ME3 is quoted and booked the same way as anywhere else. We also cover the places around Sharnal Street: Fenn Street (1 mile north-east), High Halstow (1 mile north-west), Tunbridge Hill (1 mile south-east), Kingsnorth (1 mile south-east) and Hoo St Werburgh (1 mile south-west). Larger places within reach include Gillingham (5 miles south), Chatham (6 miles south), Rochester (5 miles south-west), Rainham (6 miles south), Strood (5 miles south-west) and Luton (5 miles south).
Around Sharnal Street
We work in homes and buildings around The Hundred of Hoo Academy and The Red Dog Public House and the streets around them. The closest station to Sharnal Street is Gillingham (Kent) station, about 3.9 miles south. Nearby you’ll also find Upnor Castle (3.2 miles south-west) and Medway Maritime Hospital (4.5 miles south). The countryside around Sharnal Street includes Bishop Saltings.
What happens on the day
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and clear up. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere as small as Sharnal Street, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Read more
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- Cracked or broken glass
- Sashes that rattle, stick or won’t open
- Rotten sashes, sills or window boxes (a joiner’s job)
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before booking.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
- Sash and case windows
What affects the quote in Sharnal Street
The quote reflects the job in front of us. We take into account:
- The old material and how stubborn it is
- The number and length of the joints
- When we can work, for business premises
- How easy the joints are to reach
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.
Helping us quote
To make quoting easier, let us know:
- Any access issues, like height or stairs
- The rough size of the job
- The address or postcode of the job
- Whether it has been sealed before
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before we start.
Why it’s worth doing now in Sharnal Street
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around Sharnal Street, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and send you a clear quote before we start.
Why us?
- A 12-month guarantee on all work
- Old sealant always removed completely
- Homes, businesses and hotels
- Approved under the ARBOMaster scheme
Read what affects the cost and what customers say.
Sharnal Street: your questions answered
Is Sharnal Street within the area you cover?
Yes. Sharnal Street is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Does living near the coast affect sand mastic in Sharnal Street?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is sand mastic better than silicone for my windows?
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.
Can you replace silicone on a period window with sand mastic?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They decide whether consent is needed.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What should I tell you?
A short description and the location, plus pictures if you have them. If we need more, we will ask.
Aftercare tips
After the cure time, these simple habits help:
- Clear gutters so water doesn’t pour onto the windows
- Ask the planning authority about consent for listed or conservation-area homes
- Don’t paint over the new mastic
- Ask a joiner to look at soft timber first
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.