West Dunbartonshire · Scotland
Sand mastic for sash & case windows in Ardlui, West Dunbartonshire
Our applicators work in Ardlui on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Weathered mastic on the most exposed windows
- Mastic round period door frames that has failed
Sand mastic for homes and businesses in Ardlui
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 sash and case windows, tenement windows and period & listed homes, and people most often call us about mastic round period door frames that has failed and a silicone bead on a sash window that spoils the look.
Mastic can only go onto a dry joint, so outside work in Ardlui depends on the weather. Let us know about access to every frame, including any upstairs.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Location
- Ardlui (G83)
- Region
- West Dunbartonshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we do, step by step
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes a few hours for a single window, longer for several, including the tidy-up. Outdoor work around Ardlui depends on the weather, as sealant needs a dry surface, 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
- Keep children and pets away from the work area
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Want a quote for sand mastic? Please email us at info@mrmastic.co.uk with a few details. We will explain what we’d do and send you a clear quote before we start.
Advice
Frames and glazing around Ardlui
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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
If you let a flat or house near Ardlui station, older sash windows in a rental need their mastic kept sound to keep the weather out. Around Ardlui, as everywhere, sand mastic is only as good as the preparation behind it.
Ardlui is about 20 miles north of Helensburgh, in West Dunbartonshire. Ardlui gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Ardlui is one of 31 places in West Dunbartonshire we cover. For nearby work, see our Glasgow page, about 35 miles away.
Every address in G83 is covered for sand mastic, from the main roads to the quietest streets. Other places close to Ardlui include Inverarnan (2 miles north), Succoth (6 miles south), An Tairbeart (6 miles south), Tarbet (6 miles south) and Arrochar (7 miles south).
Local landmarks in Ardlui
Ardlui’s nearest station is Ardlui station, roughly 0.6 miles north-west of the centre. Well-known places in the area include Island I Vow Castle (1.4 miles south-east). Green spaces nearby include Geal Loch.
Ardlui: your questions answered
Can you do sand mastic in Ardlui?
Yes. Our work covers the whole of Scotland, and Ardlui is part of that. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we will send you a clear quote.
Can you help a landlord with a rental near Ardlui station?
Yes, we work for landlords and agents. Just drop us a line at info@mrmastic.co.uk and tell us about the property, and we will give you a clear price.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Ardlui, along with the rest of our area.
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.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Leave the new mastic unpainted
- Take care around the mastic when scraping paint
- Ask a joiner to look at soft timber first
- Plan mastic work ahead of painting
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Nearby places to Ardlui
More services for Ardlui
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Surface by surface
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
- Whether the work is at height
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- The address or postcode of the job
- Whether it has been sealed before
- A few photos by email, if you can
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, send an email to info@mrmastic.co.uk.
What sealant work cannot fix
It helps to know what we can’t do:
- Decisions on consent for listed homes
- Sashes that need overhauling
- Broken panes
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Tenement windows
- Period & listed homes
- Timber door frames
- Sash and case windows
- Brick reveals
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Housing providers, facilities teams and property managers book us too in Ardlui and across West Dunbartonshire. We can quote a run of properties together, and we’re fully insured for the work.