Glasgow · Scotland
Robroyston External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Robroyston, with a one-year guarantee on every job. Call for a quick quote.
- Weathered mastic that no longer stretches
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
Leave it or put it right?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way and it means sorting access once. 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.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Robroyston
- Domestic, commercial and hotel work
- Approved under the ARBOMaster scheme
- A sealant colour to suit the surroundings
- Over 20 years’ experience
External mastic in Robroyston, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. If you have brick movement joints where the sealant has split and joints pointed up with cement by mistake, we can help, whatever the surface.
On a four-storey tenement, gutter joints are a long way from the street, and a slow drip can stain and soak the stone for a long time before it’s spotted. In Robroyston, access needs planning, and work on shared parts may need the other owners’ agreement.
Our work is backed for twelve months.
- Place
- Robroyston (G33, G64, G21)
- Region
- Glasgow
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Honest limits
Before you book, it’s worth knowing the limits too:
- Adding movement joints to masonry that has none
- Loose or hollow render, which needs re-rendering
- Damp that is not coming from the joint
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
What we seal
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Act on the first splits you see
- Avoid pressure-washing directly into sealant joints
- Show decorators and builders where the movement joints are
- Look over the joints every year, ideally after winter
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
Robroyston buildings and the weather
Robroyston is in the west of Scotland, which is wetter than the east, which means movement joints and outside wall joints has to cope with a lot of rain. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that.
Rented homes near Robroyston station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Provand's Lordship, about 3.1 miles south-west, is one of the historic houses in the wider area around Robroyston.
Robroyston is about 2 miles south-east of Bishopbriggs, in Glasgow. Every kind of property in Robroyston is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Robroyston is one of 183 places in Glasgow where we work.
Jobs for external mastic in G33, G64 and G21 is quoted and booked the same way as anywhere else. Local streets include Rae Avenue, Cumnock Road and Dochart Avenue. If you’re just outside Robroyston, we cover Millerston (1 mile south-east), Hogganfield (1 mile south), Blackhill (2 miles south), Craigend (2 miles south-east) and Riddrie (2 miles south). We also work in nearby towns such as Glasgow (5 miles south-west), Hillhead (4 miles west), Dowanhill (5 miles west), Woodlands (4 miles south-west), Woodside (4 miles west) and North Kelvinside (4 miles west).
What’s near Robroyston
In Robroyston, that means homes and buildings near Springburn Park and the streets around them. The closest station to Robroyston is Robroyston station, roughly 0.6 miles south-east. Well-known places in the area include Bishop's Castle (3.1 miles south-west) and Stobhill Hospital (1.6 miles west). Not far away are Lenzie Moss and Hogganfield Loch.
Your questions about external mastic in Robroyston
Do you cover Robroyston for external mastic?
Yes. We work across all of Scotland, and Robroyston is part of that. You can email us at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear quote.
Who arranges sealant work on the shared parts of a tenement in Robroyston?
It generally 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 don’t, and we can quote for the factor or the owners directly.
Do you work for landlords and businesses?
Yes, often. Several properties can go on one quote, and between tenancies is a good time for the work.
Do you have insurance?
Yes. We are fully insured.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, send an email to info@mrmastic.co.uk with a short description of the job.
Is there a guarantee?
Yes. Every job comes with a one-year guarantee.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Can you quote for more than one area?
Yes. More than one area can go on one quote.
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. 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 several days, depending on the building. In a city area like Robroyston, 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 look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
Getting a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job.
Read more
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- The type of sealant required
- How many rooms, windows or areas are involved
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Whether it has been sealed before
- Whether it’s a home or a business
- The rough size of the job
- Any access issues, like height or stairs
There’s no standard price list. Instead, we give you a clear price for your job. To arrange one, email us at info@mrmastic.co.uk.
How the job changes by surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use, or one the system allows. Send us any details you have about the façade.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so the movement is taken up.