South Lanarkshire · Scotland
Window & door mastic in Wiston, South Lanarkshire
Our applicators work in Wiston on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Black, perished sealant on frames
- Whistling draughts around closed windows
- Gaps between the frame and the inside reveal
About our window mastic in Wiston
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on composite doors, patio & French doors and aluminium frames, and people most often call us about cracked or shrunken mastic around the frame and cracked internal joints between frame and plaster.
Outdoor sealant needs a dry surface, so window work around Wiston is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Place
- Wiston (ML12)
- Region
- South Lanarkshire
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Paint up to the joint, not over it
- Clean frames with a soft cloth and soapy water
- Avoid harsh chemicals near the mastic
- Air rooms to keep condensation down around windows
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
Leave it or put it right?
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic usually deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What you get with us
- An ARBOMaster approved applicator
- You choose the colour before work begins
- White, clear, grey or another colour, product permitting
- Over 20 years’ experience
Take a look at what affects the cost or what customers say.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
When something else is needed
A few problems are outside what sealant work can do:
- Damp coming through the wall itself rather than the frame joint
- Worn gaskets, brush seals or a door that has dropped
- A frame that has rotted at the joint
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly.
Where we work in Wiston
- Timber windows & doors
- Window sills
- uPVC windows
- Aluminium frames
- Patio & French doors
- Composite doors
What window mastic looks like in Wiston
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. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
Homes close to Wiston Parish Church include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. Around Wiston, as everywhere, window mastic is only as good as the preparation behind it.
Wiston is about 13 miles south-east of Carluke, in South Lanarkshire. Anywhere in ML12, our applicators can take on window mastic. Our area takes in 139 places across South Lanarkshire, large and small. We also work in Edinburgh, about 31 miles from Wiston.
Our applicators cover all of the ML12 postcode area for window mastic and the streets around it. Other places close to Wiston include 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).
What’s near Wiston
Nearby you’ll also find Fatlips Castle (1.4 miles north-east).
The process
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. Most jobs take most of a day for a typical house, less for a few frames. For a place like Wiston, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
How to prepare
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
- Clear the area around the work
Getting a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll take it from there.
Read more
Also near Wiston
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DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Your questions about window mastic in Wiston
Is window mastic in Wiston guaranteed?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Can you do window mastic in Wiston?
Yes, Wiston is within the area we cover. We work across all of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll give you a clear quote.
Do you work on first-floor windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can new window sealant be painted?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before work begins.
Is it worth trying 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 doesn’t work out, we can redo it.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Surface by surface
Patio & French doors
Water at the foot of a door frame is not always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match suits the frame.