Glasgow · Scotland
External & façade joints in Cowcaddens, Glasgow
External mastic across Cowcaddens and nearby, with every bit of old sealant taken out first.
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Plants rooting in failed movement joints
External mastic for homes and businesses in Cowcaddens
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. We work on concrete & block, copings & trims and façade panels, and the jobs we see most are gaps where render, brick and frames meet and hard, crazed mastic that has stopped moving.
In a Scottish city tenement, the roof, gutters and outside walls are shared by all the flats. In Cowcaddens, work on shared parts of a tenement is generally agreed between owners, often with a factor arranging it.
Your job is guaranteed for a year, as with all our work.
- Location
- Cowcaddens (G2, G3, G4)
- Region
- Glasgow
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How we quote for external mastic
The price is agreed before any work begins. It takes into account:
- How many areas need sealing
- Mould in or behind the old joints
- The size of the job
- How much old sealant there is and how hard it is to remove
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
Asking for a quote
To make quoting easier, let us know:
- The problem you’ve noticed
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- The rough size of the job
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we will come back to you with a quote.
Surface by surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Why act early in Cowcaddens
Water gets in through a failed movement joint. Dealing with it early keeps the repair to the joint, rather than the wall around it. In a Scottish city tenement, failed sealant affects more than one flat: a leak can come through the ceiling below, and gaps in shared walls or fire-rated joints matter to every flat.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why Cowcaddens customers choose us
- A choice of colours where the product allows
- An ARBOMaster approved applicator
- Domestic, commercial and hotel work
- Quality sealants from Arbo and Everbuild
Read what affects the cost or our reviews.
When it is not the sealant
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Loose or hollow render, which needs re-rendering
- Cracked brickwork or render that needs a builder or plasterer
- Adding movement joints to masonry that has none
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly.
What we seal
- Joints between brick and frames
- Façade panels
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
FAQs for Cowcaddens
I let a flat near Charing Cross (Glasgow) station. Can you help?
Yes. We work for landlords and letting agents as well as householders. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
Is Cowcaddens in your area for external mastic?
Yes. Our work covers the whole of Scotland, and Cowcaddens is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll give you a clear quote.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What happens on the day
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. Parking in city streets around Cowcaddens can be tight or controlled, so it helps to know about permits or nearby bays. For flats, mention the door entry system and any shared-stair arrangements.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Mention if the joints have been sealed before
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Just drop us a line at info@mrmastic.co.uk with the details.
Related advice
Cowcaddens buildings and the weather
With historic houses such as Tenement House (about 0.3 miles west) nearby, there’s older building stock in the area around Cowcaddens as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. Glasgow’s tenements are largely red and blond sandstone, and sandstone is porous, so any sealant against it has to be one that won’t stain or attack it.
Tenement House, about 0.3 miles west, is one of the historic houses in the wider area around Cowcaddens, and older homes nearby need a sealant that suits their walls. For site and facilities teams at buildings such as St Aloysius' College, its movement joints, gutters and trims need looking after like any other building’s. For landlords with property near Charing Cross (Glasgow) station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Cowcaddens is about 1 mile north-east of Glasgow, in Glasgow. If you need external mastic in Cowcaddens, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We cover Glasgow from our Crawley base. Across Glasgow, we cover 183 places, Cowcaddens among them.
Postcode districts we cover here for external mastic: G2, G3 and G4. External mastic is available to properties on Bath Lane, Ashley Lane and Baliol Lane and the roads around them. Cowcaddens is on the A804, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in Garnethill (1 mile west), Anderston (1 mile west), Port Dundas (1 mile north-east), Blythswood Hill (1 mile south-west) and Townhead (1 mile south-east). Within a short drive, we also cover Langside (3 miles south), Yoker (5 miles west), Mount Florida (3 miles south), Hillpark (4 miles south), Shawlands (3 miles south) and Temple (3 miles north-west).
Local landmarks in Cowcaddens
In Cowcaddens, that means homes and buildings near Stirling's Library, The Hengler's Circus pub and Kelvingrove Park and the streets around them. You will also find St Vincent Street Church (0.5 miles south-west) and College of Piping (1 mile north-west). The closest station to Cowcaddens is Charing Cross (Glasgow) station, roughly 0.5 miles south-west of the centre. Well-known places in the area include Bishop's Castle (1 mile south-east) and Glasgow Dental Hospital and School (less than half a mile south-west). For a walk, there’s Hogganfield Loch.
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Keep soil, plants and ivy away from the joints
- Look over the joints every year, ideally after winter
- Keep high-pressure jets off the joints
- Check the sealant is paintable before painting near it
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead over time.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Towns and villages near Cowcaddens
More services for Cowcaddens
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
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.