Glasgow · Scotland
External Mastic in Blochairn
External mastic across Blochairn and nearby, with old sealant always removed completely and a 12-month guarantee.
- Brick movement joints where the sealant has split
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
External mastic for homes and businesses in Blochairn
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the joint doesn’t stand out. We work on joints between brick and frames, brickwork movement joints and copings & trims, and people most often call us about cracked joints where brick meets render or frames and rigid filler in a joint that should flex.
Alongside their tenements, Scotland’s cities have modern blocks with render, cladding and movement joints. Around Blochairn, as anywhere, those joints dry out and crack over time, letting water behind the face of the building.
Whatever the size of the job, you get the same 12-month guarantee in Blochairn and across Glasgow.
- Place
- Blochairn (G31, G21, G58)
- Region
- Glasgow
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Blochairn: your questions answered
Do you cover Blochairn for external mastic?
Yes, Blochairn is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
How do repairs to the shared parts of a tenement in Blochairn get organised?
Shared parts of a tenement, such as the roof and outside walls, are generally 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.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose, and the wall may crack nearby. We’ll reseal it with a flexible sealant.
Do you have insurance?
Yes, we’re fully insured for every job we do.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Surface by surface
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it so the sealant is not too deep.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. 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.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why choose Mr Mastic in Blochairn
- Fully insured
- Old sealant always removed completely
- Tidy, careful work
- White, clear, grey or coloured to suit, where the product allows
Read our cost guide or our reviews.
What external mastic looks like in Blochairn
Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex. 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. Your title deeds say which parts are shared.
If you let a flat or house near Alexandra Parade station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For an older house near a landmark such as Our Lady of Good Counsel Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For site and facilities teams at buildings such as St. Roch's Secondary School, its movement joints, gutters and trims need looking after like any other building’s.
Blochairn is about 2 miles north-east of Glasgow, in Glasgow. Jobs in Blochairn get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 183 towns and villages across Glasgow, from the larger towns to small villages.
All of G31, G21 and G58 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Townmill Road, Blochairn Road and Petershill Road or anywhere close by, our applicators can take on the job. Main roads around Blochairn include the M8 and A8, which makes travel easy. Neighbouring places we cover for external mastic include Old Balornock (1 mile west), Germiston (1 mile north-east), Royston (1 mile west), Dennistoun (1 mile south) and Provanmill (1 mile north-east). Larger places within reach include Hillhead (3 miles west), Dowanhill (3 miles west), Partickhill (4 miles west), Yorkhill (3 miles west), Kelvinside (4 miles west) and Hyndland (4 miles west).
Landmarks near Blochairn
In Blochairn, that means homes and buildings near Andersonian Library and Springburn Park. The nearest railway station is Alexandra Parade station, roughly 0.5 miles south-east. Other landmarks nearby include Bishop's Castle (0.9 miles south-west) and Glasgow Royal Infirmary Museum (0.8 miles south-west). Open spaces near Blochairn include Lenzie Moss and Hogganfield Loch.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. In a city area like Blochairn, 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.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we are working on
- Keep children and pets away from the work area
Getting a quote
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’s easy.
Read more
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Get split or bare joints resealed while the damage is small
- Keep movement joints as flexible joints, not mortar
- Keep high-pressure jets off the joints
- Point out the joints to other trades
Don’t paint over the new sealant unless we have said the product is paintable. Many exterior sealants aren’t designed to be painted and spoil the finish.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Landlord and commercial work in Blochairn
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Towns and villages near Blochairn
What else we do in Blochairn
What we can’t put right
It helps to know what we can’t do:
- Failed render or damaged cladding panels
- Movement that’s more than a sealant joint can take
- Walls that need new movement joints cut into them
If you’re not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Where we work in Blochairn
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Concrete & block