South Lanarkshire · Scotland
Sand mastic for sash & case windows in Strathaven, South Lanarkshire
Window and door surrounds in Strathaven need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- A silicone bead on a sash window that spoils the look
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Don’t paint over the new mastic
- Keep sills and gutters clear so water drains away
- Check with your local planning authority if your home is listed
- Plan mastic work ahead of painting
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
How we handle sand mastic in Strathaven
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. Typical jobs include window mastic to renew ahead of painting and draughty sash windows at the surround, on stone surrounds, period & listed homes and sash and case windows.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
Our work is backed for twelve months, in Strathaven and everywhere else we cover.
- Place
- Strathaven (ML10)
- Wider area
- South Lanarkshire
- Cover
- One year on every job
- Quotes
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Your questions about sand mastic in Strathaven
Do you cover Strathaven for sand mastic?
Yes, Strathaven is within the area we cover. We work across all of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job.
Is sand mastic in Strathaven guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Strathaven.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we’ll talk you through it.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How long does the job take?
Most jobs take a few hours per window, depending on the condition of the joints, including preparation and clearing up. Your quote will say how long we expect yours to take.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
Frames and glazing around Strathaven
The west of Scotland is wetter than the east, so there’s plenty of rain for the mastic around older windows and doors to keep out. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
For an older house near a landmark such as East Parish Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Strathaven is about 6 miles south of Hamilton, in South Lanarkshire. For sand mastic in and around Strathaven, please drop us a line at info@mrmastic.co.uk for a quick quote. We cover South Lanarkshire from our Crawley base, Strathaven included. Strathaven is one of 139 towns and villages in South Lanarkshire we cover. Our Glasgow page covers work nearby.
All of ML10 is covered for sand mastic, from the main roads to the quietest streets. Sand mastic is available to properties on Main Street, Station Road and Loudon Street and the roads around them. Nearby, we also carry out sand mastic in Sandford (2 miles south-east), Glassford (2 miles north-east), Chapelton (3 miles north-west), Stonehouse (3 miles east) and Quarter (4 miles north). Larger places within reach include East Kilbride (7 miles north-west), Hamilton (6 miles north), Cambuslang (10 miles north), Uddingston (10 miles north), Blantyre (8 miles north) and Larkhall (5 miles north-east). Strathaven is one of the larger places we cover in South Lanarkshire.
Near you in Strathaven
Other landmarks nearby include Strathaven Castle (less than half a mile south) and Stonehouse Hospital (3 miles east).
DIY versus a professional finish
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.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Surface by surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Period and listed homes
Period homes look their best with traditional materials.
What else we do in Strathaven
When to call us in Strathaven
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Keep an eye out for any of the following:
- Crumbling sand mastic round a window
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
If you look after a building such as Strathaven Academy, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before you book
- Is VAT in the price?
- What happens if the job turns out different
- Which colour the sealant will be
- Whether the sealant suits the joint
The process
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it generally takes a few hours per window, depending on the condition of the joints. Outside jobs in Strathaven need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
- Mention any sign-in or site rules at work premises
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, email us at info@mrmastic.co.uk.
Related advice
What we can’t put right
It helps to know what we can’t do:
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
- Broken panes
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer.
Surfaces we seal
- Tenement windows
- Period & listed homes
- Sash and case windows
- Timber door frames
- Brick reveals
- Stone surrounds
How we quote for sand mastic
The quote reflects the job in front of us. We look at:
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- Access and height
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Helping us quote
What to tell us when you ask for a quote:
- The rough size of the job
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work.