Kent · England
Sand mastic for sash & case windows in Monkton, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Monkton. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Gaps between timber frames and stone or brick
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
Sand mastic in Monkton
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you’re dealing with cracked mastic round a front door frame and mastic that needs renewing before redecorating, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Monkton is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
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.
- Where
- Monkton (CT12)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Check the mastic when you check the paintwork
- Check with your local planning authority if your home is listed
- Keep sills and gutters clear so water drains away
- Do not paint over the new mastic
Check the mastic when you check the paintwork. Small cracks are easier to deal with early.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
How the job changes by surface
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Nearby places to Monkton
Also in Monkton
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take a few hours for a single window, longer for several. In a small place like Monkton, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- The joint is raked out and cleaned.
- 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.
Getting ready for the visit
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
Monkton homes and the weather
With historic houses such as Quex Park (about 2.6 miles north-east) nearby, there’s older building stock in the area around Monkton as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Rented homes near Minster station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. For site and facilities teams at buildings such as Monkton Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Monkton is about 5 miles south-west of Margate, in Kent. Whether you’re in the middle of Monkton or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Monkton is one of 922 towns and villages in Kent where we work. Our Chelmsford page covers work nearby.
Every address in CT12 is within our area for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on Monkton Street, Collards Close and Seamark Close or a nearby road, we can help. Nearby, we also carry out sand mastic in Hoo (1 mile east), St Nicholas at Wade (1 mile north-west), Sarre (2 miles west), East Stourmouth (2 miles south-west) and Westmarsh (2 miles south). Within a short drive, we also cover Canterbury (10 miles south-west), Margate (5 miles north-east), Dover (14 miles south), Ramsgate (6 miles east), Broadstairs (7 miles east) and Whitstable (11 miles west).
Landmarks near Monkton
Monkton’s nearest station is Minster station, about 1.8 miles south-east. Nearby you will also find Powell-Cotton Museum (2.4 miles north-east) and Queen Elizabeth the Queen Mother Hospital (5.5 miles north-east). The countryside around Monkton includes Sandwich and Pegwell Bay.
Monkton: your questions answered
I let a flat near Minster station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is Monkton in your area for sand mastic?
Yes. Our work covers London and the South East, and Monkton is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or drop us an email.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
How long does sand mastic take?
That depends on how much there is to do, but as a guide it takes a few hours per window, depending on the condition of the joints. We will tell you when we quote.
Honest limits
Sealant is not the answer to every problem, and we’ll tell you before any work starts. Sealant won’t put right:
- Planning or listed building consent (your local planning authority decides)
- Cracked or broken glass
- Masonry that needs repairing
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
What we seal
- Tenement windows
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, 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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
When to call us in Monkton
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber and we normally remove them.
People normally contact us when they notice one of these:
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Modern sealant on a period surround
- Window mastic to renew ahead of painting
In the older streets around Church of Saint Mary Magdalene, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- Whether they’re fully insured
- Which sealant they’ll use, and why
- Whether you can choose the colour
- The length of the guarantee
Landlord and commercial work in Monkton
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
If you manage several properties in or around Monkton, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.