Buckinghamshire · England
Shalstone Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Shalstone. Fully insured, ARBOMaster approved and guaranteed for a year.
- Open joints round the window box
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
Sand mastic for homes and businesses in Shalstone
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. We rake it out and renew it so the surround looks right again. We work on stone surrounds, timber door frames and brick reveals, and the jobs we see most are gaps between timber frames and stone or brick and mastic round period door frames that has failed.
Mastic can only go onto a dry, clean joint, so window work in Shalstone 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.
- Place
- Shalstone (MK18)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Also near Shalstone
Other services in Shalstone
What we do, step by step
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours per window, depending on the condition of the joints. Somewhere as small as Shalstone, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check the window surrounds and agree which joints need renewing.
- Old, loose 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.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Advice
What we can’t put right
It helps to know what we cannot do too:
- Broken panes
- Sash cords, weights and draught-proofing of the sashes
- Crumbling stone or brickwork round the window
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Brick reveals
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What sand mastic looks like in Shalstone
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Stowe House (about 2 miles east) are a reminder that the area around Shalstone has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
In and around Shalstone, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Shalstone is in Buckinghamshire. For sand mastic in and around Shalstone, please phone 0345 464 0079 or send us an email for a quick quote. We cover Buckinghamshire from our Crawley base, Shalstone included. Shalstone is one of 263 places in Buckinghamshire where we work for sand mastic. Our Oxford page covers work nearby.
Jobs for sand mastic in MK18 is quoted and booked the same way as anywhere else. Nearby, we also carry out sand mastic in Water Stratford (2 miles south), Dadford (2 miles north-east), Radclive (3 miles south-east) and Chackmore (3 miles east). We also work in nearby towns such as Buckingham (4 miles south-east), Winslow (10 miles south-east), Steeple Claydon (7 miles south-east), Tingewick (3 miles south), Whitchurch (14 miles south-east) and Quainton (12 miles south-east).
Near you in Shalstone
Nearby you will also find Beaumont Castle (2.6 miles south-west) and The Menagerie (2 miles east). Not far away are Buckingham Sand Pit.
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- Access and height
- The old material and how stubborn it is
- The product the joint needs
- The number of rooms or windows
Leaving a failed joint normally makes the job bigger, not smaller. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- A few pictures by email, if you can
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- If someone has resealed it before
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, ring 0345 464 0079 or send us an email.
Questions from Shalstone
Is there a guarantee on sand mastic in Shalstone?
All our work, in Shalstone and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you do sand mastic in Shalstone?
Yes, Shalstone is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like but the decision is theirs.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
Is sand mastic better than silicone for my windows?
That depends on your windows. Period windows in stone or brick generally suit sand mastic and newer frames usually get a flexible sealant.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or send us an email.
When to call us in Shalstone
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Most people get in touch when they notice one of these:
- Draughts and rain around sash boxes
- Failed mastic on an exposed elevation
- Open joints round the window box
- Patchy fillers round a sash window
In the older streets around Church of St Edward, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- The length of the guarantee
- What the quote includes, VAT included or not
- How hidden problems are handled
- How the colour is chosen
How the job changes by surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we will confirm what’s needed.