West Dunbartonshire · Scotland
Sand Mastic in Cardross
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Cardross and across West Dunbartonshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Mastic that needs renewing before redecorating
How we handle sand mastic in Cardross
Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice and we can swap the silicone for it. Common call-outs are for modern sealant on a period surround and gaps round a timber door in stone or brick, on timber door frames, sash and case windows and period & listed homes.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Cardross (G82)
- Region
- West Dunbartonshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Cardross questions
Do you cover smaller places like Cardross?
Yes. Cardross is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Cardross station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. You can drop us a line at info@mrmastic.co.uk with the details for a clear quote.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
How do I get a quote for sand mastic in Cardross?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can old silicone round a sash window be swapped for sand mastic?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- The amount of work
- Which sealant suits the joint
- The old material and how stubborn it is
- When we can work, for business premises
What it costs depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Asking for a quote
To help us quote quickly, let us know:
- Where the job is, and your postcode
- A few photos by email, if you can
- What’s wrong with the joints now
- Whether it’s a home or a business
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Honest limits
Before booking, it’s worth knowing the limits:
- Decisions on consent for listed homes
- Sashes that rattle, stick or won’t open
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
Surfaces we seal
- Brick reveals
- Sash and case windows
- Timber door frames
- Tenement windows
- Period & listed homes
- Stone surrounds
Landlord and commercial work in Cardross
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too in Cardross and across West Dunbartonshire. Several sites can go on one quote, and we’re fully insured for the work.
Cardross homes and the weather
Cardross is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
If you let a flat or house near Cardross station, any sash windows need sound mastic to keep draughts and rain out.
Cardross is about 3 miles north of Port Glasgow, in West Dunbartonshire. Our applicators cover sand mastic for householders, landlords and businesses in Cardross and nearby. Cardross is one of 31 places in West Dunbartonshire we cover for sand mastic. Glasgow is on our list too, around 17 miles away.
Postcode districts we cover here for sand mastic: G82. Streets in the area include Station Road, Muirend Road and Fernie Gardens. Close by, we work in Colgrain (2 miles north-west), Woodhall (2 miles south), Castlehill (2 miles south-east), Port Glasgow (3 miles south) and Bogston (3 miles south-west). Larger places within reach include Clydebank (10 miles east), Dumbarton (4 miles east), Alexandria (3 miles north-east), Linnvale (11 miles east), Crosslet (4 miles east) and Balloch (4 miles north-east). Cardross is one of the larger places we cover in West Dunbartonshire.
Around Cardross
Cardross has its own railway station: Cardross station. Nearby you’ll also find Dumbarton Joint Hospital (2.5 miles south-east) and Kilmahew Castle (0.7 miles north-east).
Common problems we fix in Cardross
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
The most common problems we see are:
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
- Gaps round a timber door in stone or brick
If you live in an older home near Parish Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
What to look for in a quote
- When the joint can take water or movement
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Nearby places to Cardross
Other services in Cardross
DIY versus a professional finish
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.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
What we do, step by step
The work is kept neat and contained to the joints we’re treating. The job normally takes a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. Outside jobs in Cardross need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any leaks or damp you’ve noticed
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
Getting a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, email us at info@mrmastic.co.uk.