Kent · England
Sand mastic for sash & case windows in Sevenscore, Kent
Window and door surrounds in Sevenscore need attention? We remove the old material, prepare the joints and seal them properly.
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
- Gaps between timber frames and stone or brick
Common questions in Sevenscore
Does the coastal weather in Sevenscore affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is Sevenscore within the area you cover?
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.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
Can tenants book the work?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
How long will you be here?
That depends on how much there is to do, but as a guide it takes a few hours for a single window, longer for several. We will tell you when we quote.
Are you insured?
Yes. We are fully insured for domestic and commercial work.
How we handle sand mastic in Sevenscore
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditional guidance is not to paint over it, so ask us before you decorate. We work on period & listed homes, stone surrounds and tenement windows, and the jobs we see most are draughts and rain around sash boxes and cement or filler used on old window joints that has cracked.
In a village or hamlet like Sevenscore, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Whatever the size of the job, it’s backed by our 12-month guarantee in Sevenscore and across Kent.
- Place
- Sevenscore (CT12)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Like-for-like sand mastic is usually favoured.
Timber door frames
Round a period front door, sand mastic gives the right look.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Sashes that need overhauling
- Decisions on consent for listed homes
- Cracked or broken glass
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Brick reveals
- Period & listed homes
- Sash and case windows
- Tenement windows
- Timber door frames
Why deal with it now?
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 Sevenscore, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
Why choose Mr Mastic in Sevenscore
- A 12-month guarantee on all work
- An ARBOMaster approved applicator
- Arbo and Everbuild products
- Homes, businesses and hotels
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
A careful DIYer can reseal a simple joint, 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.
Quotes for sand mastic in Sevenscore
Your quote is based on your job. We look at:
- How easy the joints are to reach
- Whether there’s mould to deal with
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Asking for a quote
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- How we’d reach the joints
- The rough size of the job
- Photos by email, if that is easy
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
When to call us in Sevenscore
Age is the main cause. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
The most common problems we see are:
- A silicone bead on a sash window that spoils the look
- Patchy fillers round a sash window
- Weathered mastic on the most exposed windows
- Mastic dropping out of the joint
Homes close to St Mary include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Whether they’re fully insured
- What happens if the job turns out different
- What guarantee comes with the work
- What the cure time is
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes anything from a few hours to a full day, depending on how many windows. Somewhere as small as Sevenscore, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
Related advice
Sand mastic in Sevenscore: local notes
Sevenscore 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. That’s 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Thanet Parkway station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Sevenscore is about 3 miles west of Ramsgate, in Kent. Wherever you are in the CT12 postcode area, our applicators can take on sand mastic. 922 places in Kent are on our list. For nearby work, see our Chelmsford page.
Jobs for sand mastic in CT12 is quoted and booked the same way as anywhere else. Neighbouring places we cover for sand mastic include Cliffs End (1 mile east), Way (1 mile north-west), Ebbsfleet (1 mile south), Richborough Port (2 miles south) and Manston (2 miles north-east). Within a short drive, we also cover Canterbury (12 miles west), Margate (4 miles north-east), Dover (13 miles south), Ramsgate (3 miles east), Broadstairs (4 miles north-east) and Whitstable (14 miles west).
Near you in Sevenscore
Around Sevenscore, our work takes us to homes and buildings near The Sportsman pub and Sandwich and Pegwell Bay, among other places. Sevenscore’s nearest station is Thanet Parkway station, roughly 0.7 miles east of the centre. Well-known places in the area include Westwood Cross (3 miles north-east) and Ramsgate General Hospital (2.8 miles east). For a walk, there’s Sandwich and Pegwell Bay.