South Lanarkshire · Scotland
Sand mastic for sash & case windows in Wiston, South Lanarkshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Wiston, backed by a one-year guarantee. Ask us for a quote.
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Open joints round the window box
Sand mastic in Wiston
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. If you are dealing with draughty sash windows at the surround and weathered mastic on the most exposed windows, we can help.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Wiston (ML12)
- Region
- South Lanarkshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Leave it or put it right?
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. In an older home around Wiston, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Wiston
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
- More than 20 years in sealant work
- Domestic, commercial and hotel work
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Frames and glazing around Wiston
Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that.
In the older streets around Wiston Parish Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Wiston is about 13 miles south-east of Carluke, in South Lanarkshire. Our applicators cover sand mastic for homes and businesses in Wiston and nearby. Our area takes in 139 places across South Lanarkshire. Edinburgh is on our list too, about 31 miles from Wiston.
Work in ML12 works the same way as everywhere else we cover. We also cover the places around Wiston: Roberton (2 miles south-west), Symington (3 miles north-east), Thankerton (4 miles north), Coulter (4 miles east) and Carmichael (5 miles north-west). Within a short drive, we also cover Carluke (13 miles north-west), Lanark (9 miles north-west), Lesmahagow (10 miles north-west), Law (15 miles north-west), Biggar (6 miles north-east) and Kirkmuirhill (12 miles north-west).
Near you in Wiston
Well-known places in the area include Fatlips Castle (1.4 miles north-east).
Different surfaces, different methods
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
What affects the quote in Wiston
The price is agreed before any work begins. It takes into account:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- How much there is to do
- How easy the joints are to reach
Doing several joints on one visit generally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Helping us quote
You do not need to know the technical terms. It helps if you can tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
- Whether it has been sealed before
To get a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. You’ll have a clear quote before work begins.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Putty and glazing repairs
- Sashes that need overhauling
- Masonry that needs repairing
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think before booking.
What we seal
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
- Tenement windows
The process
The work is kept neat and contained to the area we are working on, so you can get on with your day. The job usually takes a few hours for a single window, longer for several, and we explain the cure time before we leave. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Clear the area around the work
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, email us at info@mrmastic.co.uk.
Related advice
Your questions about sand mastic in Wiston
Is Wiston within the area you cover?
Yes, Wiston is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do sand mastic in Wiston?
Yes. Our work covers the whole of Scotland, and Wiston is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. The old silicone has to come out completely so the mastic can sit properly.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours for a single window, longer for several. We will give you a better idea when we quote.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Places near Wiston
What else we do in Wiston
Common problems we fix in Wiston
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint and we normally remove them.
If you can see any of these, it’s time to have the joints looked at:
- Cracked mastic round a front door frame
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Mastic that needs renewing before redecorating
In and around Wiston, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Are they insured?
- How the colour is chosen
- How the joint is cleaned and prepared
- The length of the guarantee