Glasgow · Scotland
Sand mastic for sash & case windows in Thornliebank, Glasgow
We cover Thornliebank for 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 one-year guarantee.
- Patchy fillers round a sash window
- Gaps between timber frames and stone or brick
- Draughty sash windows at the surround
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Damaged stone surrounds
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that rattle, stick or won’t open
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Period & listed homes
- Timber door frames
- Stone surrounds
- Sash and case windows
- Tenement windows
Sand mastic in Thornliebank, done properly
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. Common call-outs are for mastic that needs renewing before redecorating and draughty sash windows at the surround, on brick reveals, period & listed homes and timber door frames.
Scotland’s cities are full of stone-built tenements and terraces, in sandstone or granite. Natural stone around older windows needs a sealant that will not mark or attack it, which usually means a neutral-cure product or a traditional sand mastic rather than an acetoxy silicone.
All our work comes with a one-year guarantee.
- Place
- Thornliebank (G46, G77)
- Wider area
- Glasgow
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Different surfaces, different methods
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Go gently near the mastic when preparing windows
- Avoid patching sand mastic with silicone
- Have rotten timber repaired before new mastic goes in
- Ask us before painting near the mastic
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
Questions from Thornliebank
Can you help a landlord with a rental near Whitecraigs station?
Yes, rental work is part of what we do. You can email us at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before we start.
Is Thornliebank in your area for sand mastic?
Yes. Our work covers the whole of Scotland, and Thornliebank is part of that. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we will give you a clear quote.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
When will the new mastic be hard?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you match the sealant colour?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Nearby places to Thornliebank
More services for Thornliebank
Why deal with it now?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Wind-driven rain gets into any failed joint on the outside of a city building, and in Thornliebank, damp can spread through stone and plaster before anyone sees it.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why book with us
- Anti-fungal silicone where joints get wet
- A 12-month guarantee on all work
- 4.9 on Google from 180+ five-star reviews
- Over 20 years’ experience
Read our cost guide or our reviews.
Landlord and commercial work in Thornliebank
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
What we do, step by step
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes anything from a few hours to a full day, depending on how many windows. Many homes in Scotland’s cities are tenement flats, reached through a shared close and up a common stair. In Thornliebank, it helps to know the floor, the door entry arrangements and the nearest parking.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
Getting a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
Advice
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. 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.
Windows and doors in Thornliebank
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Under the Tenements (Scotland) Act 2004, shared parts of a tenement, such as the roof and outside walls, are looked after by the owners together, often through a property factor. Windows normally belong to the flat, but the title deeds have the final say.
Managing a site like Eastwood High School? Then the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Whitecraigs station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Pollok House, about 1.9 miles north, is one of the historic houses in the wider area around Thornliebank.
Thornliebank is about 1 mile west of Giffnock, in Glasgow. We provide sand mastic to homes and businesses in Thornliebank, as part of our work across Glasgow. We cover 183 towns and villages across Glasgow, large and small.
We cover every part of G46 and G77 for sand mastic. You’ll find streets such as Skibo Lane, Main Street and Arden Avenue. Nearby, we also carry out sand mastic in Carnwadric (1 mile north-west), Arden (1 mile north-west), Kennishead (1 mile north), Eastwood (1 mile north) and Southpark Village (1 mile west). Further out, we also cover Glasgow (4 miles north-east), Hillhead (5 miles north), Dowanhill (5 miles north), Woodlands (5 miles north), Woodside (5 miles north) and North Kelvinside (6 miles north).
Landmarks near Thornliebank
Typical jobs here are in homes near Rouken Glen and Belmont House School. For rail, the closest station is Whitecraigs station, roughly 0.7 miles south of the centre. A little further out are Glasgow Victoria Infirmary (2.7 miles north-east) and Silverburn Shopping Centre (1.8 miles north-west). Green spaces nearby include Cathkin Braes and Brother Loch.