Glasgow · Scotland
Window & door mastic in Port Dundas, Glasgow
Mastic around window and door frames, sills and patio doors for homes and businesses in Port Dundas and across Glasgow. Fully insured, ARBOMaster approved and guaranteed for a year.
- Untidy mastic left by window fitters
- Cold air getting in at the frame edge
- Leaking joints at the ends of sills
Window mastic in Port Dundas
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We work on window sills, composite doors and patio & French doors, and people most often call us about a bead that doesn’t match the frame and hard, cracked sealant around windows.
Scotland’s cities are full of stone-built tenements and terraces, in sandstone or granite. Stone needs a sealant that suits it, which normally means a neutral-cure product or a traditional sand mastic rather than an acetoxy silicone.
All our work comes with our 12-month guarantee, wherever you are in Glasgow.
- Where
- Port Dundas (G4, G2, G3)
- Wider area
- Glasgow
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Questions from Port Dundas
How do repairs to the shared parts of a tenement in Port Dundas get organised?
Shared parts of a tenement, such as the roof and outside walls, are usually repaired with the agreement of the owners, often through a property factor. Where the title deeds are silent, the Tenements (Scotland) Act 2004 fills the gaps. Windows often belong to the individual flat, but it’s worth checking your deeds.
Is Port Dundas in your area for window mastic?
Yes. We work across all of Scotland, and Port Dundas is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you take out the old sealant first?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Can you match the sealant to my frames?
Normally, yes. Mention the frame colour when you ask for a quote and we’ll match it as closely as we can.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. Then send an email to info@mrmastic.co.uk.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we will plan for it.
When to call us in Port Dundas
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, and it lets go sooner than it should.
The most common problems we see are:
- Gaps where the sill meets the wall
- Cracked internal joints between frame and plaster
- Draughts coming in around windows and doors
- A bead that doesn’t match the frame
For landlords with property near Glasgow Queen Street station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before booking
- The length of the guarantee
- When the joint can take water or movement
- How the surfaces are prepared before sealing
- How the colour is chosen
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Don’t aim a pressure washer at the joints
- Avoid harsh chemicals near the mastic
- Look round the frames every year or so
- Make sure the drainage slots are not blocked
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Leaks generally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
What happens if it’s left?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. A low-modulus exterior sealant keeps its stretch through hot and cold weather. In a Scottish city tenement, failed sealant affects more than one flat: water can reach the flat below, and gaps in shared walls or fire-stopping affect the whole stair.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
What you get with us
- Homes, businesses and hotels
- Quality sealants from Arbo and Everbuild
- Sealant colour chosen to suit
- Approved under the ARBOMaster scheme
See our cost guide or customer reviews.
Landlords, agents and businesses in Port Dundas
For anyone letting property in or around Port Dundas, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How we quote for window mastic
Your quote is based on your job. We look at:
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- Access and height
- When we can work, for business premises
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- How we’d reach the joints
- Whether it has been sealed before
- Pictures of the joints, sent by email
- Where the job is, and your postcode
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
What window mastic looks like in Port Dundas
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
If you look after a building such as St Aloysius' College, the mastic around its windows and doors needs looking after like any other building’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. Whether you’re in the middle of Port Dundas or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. 183 places in Glasgow are on our list.
Work in G4, G2 and G3 is quoted and booked the same way as anywhere else. If you need window mastic at a property on Possil Road, Dawson Road and Braid Square or a nearby road, our applicators can take on the job. Port Dundas sits on or near the A804, so getting to you is simple. We also cover the places around Port Dundas: 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). Further out, we also cover 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
Locally, jobs take us to homes and businesses close to Andersonian Library, St Vincent Street Church and College of Piping, among other places. Also close by are Kelvingrove Park (1.3 miles west) and 81 pub (0.7 miles south). The nearest railway station is Glasgow Queen Street station, about 0.7 miles south. Nearby you’ll also find Bishop's Castle (1 mile south-east) and Chinatown (less than half a mile south-west). Not far away are Hogganfield Loch and Lenzie Moss.
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a few frames, or a day or more for a whole house. In a city area like Port Dundas, parking may be by permit or pay-and-display, so tell us what’s nearby. For flats, mention the door entry system and any shared-stair arrangements.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
How to prepare
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work before giving you a price.
Advice
Surface by surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain cannot run into the wall.