Glasgow · Scotland
Sand mastic for sash & case windows in Port Dundas, Glasgow
Sand mastic for Port Dundas, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Wind and rain getting in round a sash window
- Mastic round period door frames that has failed
- Tired mastic found when preparing windows for paint
Sand mastic in Port Dundas
Sand mastic doesn’t last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. We work on period & listed homes, timber door frames and stone surrounds, and the jobs we see most are failed mastic on an exposed elevation and old sand mastic that has cracked, crumbled or fallen out.
Scotland’s cities are full of stone-built tenements and terraces, in sandstone or granite. Natural stone around older windows needs a sealant that won’t mark or attack it, which usually means a neutral-cure product or a traditional sand mastic rather than an acetoxy silicone.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Place
- Port Dundas (G4, G2, G3)
- Region
- Glasgow
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Landlords, agents and businesses in Port Dundas
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Landlords and agents in Port Dundas can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
What sealant work can’t fix
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
- Sash cords, weights and draught-proofing of the sashes
If in doubt, drop us a line at info@mrmastic.co.uk and we’ll say what we think before booking.
What we seal
- Sash and case windows
- Stone surrounds
- Tenement windows
- Timber door frames
- Period & listed homes
- Brick reveals
Why deal with it now?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. Wind-driven rain gets into any failed joint on the outside of a city building, and in a tall building in Port Dundas, damp can travel a long way before it shows.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Port Dundas
- We never seal over old sealant
- We leave the area clean and tidy
- We are fully insured
- Rated 4.9 stars on Google
Take a look at what affects the cost or customer reviews.
What affects the quote in Port Dundas
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Any mould that needs treating
- The product the joint needs
- The number of rooms or windows
- How easy the joints are to reach
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Asking for a quote
When you contact us, it’s useful to know:
- What’s wrong with the joints now
- The address or postcode of the job
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, email us at info@mrmastic.co.uk.
Port Dundas questions
How do repairs to the shared parts of a tenement in Port Dundas get organised?
It usually goes through the owners together, or through the factor if the building has one. The Tenements (Scotland) Act 2004 covers the common parts where the deeds do not.
Is Port Dundas in your area for sand mastic?
Yes. Our work covers the whole of Scotland, and Port Dundas is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job.
Is the work guaranteed?
Our 12-month guarantee applies to all our work.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
Can sand mastic be painted?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Port Dundas, along with the rest of our area.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then email us at info@mrmastic.co.uk.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
How to look after the new joints
So the new joints stay in good condition:
- Sort the mastic before the decorators arrive
- Look over the window mastic once a year
- Find out about consent before window work on a listed home
- Avoid patching sand mastic with silicone
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.
Also near Port Dundas
Other services in Port Dundas
Port Dundas homes and the weather
Glasgow’s tenements are largely red and blond sandstone, and porous sandstone needs a sealant that won’t mark it. The Tenements (Scotland) Act 2004 sets out how owners share the upkeep of common parts like the roof and outside walls, often through a property factor. Who owns the windows depends on the title deeds.
For landlords with property near Glasgow Queen Street station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like St Aloysius' College? Then its window and door frames need their mastic kept sound, just like a home’s. Tenement House, about 0.7 miles south-west, is one of the historic houses in the wider area around Port Dundas, and older homes nearby need a sealant that suits their walls.
Port Dundas is about 2 miles north-east of Glasgow, in Glasgow. Homes, rented property, offices and hotels in Port Dundas is covered for sand mastic. The work is guaranteed for a year. We cover 183 towns and villages across Glasgow, large and small.
All of G4, G2 and G3 is within our area for sand mastic, from the main roads to the quietest streets. We cover properties on Possil Road, Dawson Road and Braid Square and the roads around them. Port Dundas is on the A804, so it’s easy for us to get to with everything needed for sand mastic. Nearby, we also carry out sand mastic in Cowcaddens (1 mile south-west), Hamiltonhill (1 mile north-west), Sighthill (1 mile east), Townhead (1 mile south-east) and Garnethill (1 mile south-west). Larger places within reach include Langside (3 miles south), Yoker (5 miles west), Mount Florida (4 miles south), Hillpark (4 miles south), Shawlands (3 miles south-west) and Temple (3 miles north-west).
Around Port Dundas
We work in homes and buildings around Andersonian Library, St Vincent Street Church and College of Piping, among other places. Nearby too are Kelvingrove Park (1.3 miles west) and 81 pub (0.7 miles south). For rail, the closest station is Glasgow Queen Street station, roughly 0.7 miles south. Well-known places in the area include Bishop's Castle (1 mile south-east) and Chinatown (within half a mile south-west). Green spaces nearby include Hogganfield Loch and Lenzie Moss.
The process
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a single window, longer for several. Many homes in Scotland’s cities are tenement flats, reached through a shared close and up a common stair. For a job in Port Dundas, tell us the floor, how the door entry system works and where we can park nearby.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
- For business premises, tell us about site rules or sign-in
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Simply send an email to info@mrmastic.co.uk and describe the job and send pictures if you have them.