Glasgow · Scotland
External Mastic in Finnieston
External mastic for Finnieston and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
About our external mastic in Finnieston
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint doesn’t stand out. If you have cracked joints where brick meets render or frames and joints where the bead has come unstuck, we can help, on concrete & block, façade panels and copings & trims alike.
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. For a building in Finnieston, access is planned first, and shared parts may need the other owners to agree.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Finnieston (G3, G51, G11)
- Wider area
- Glasgow
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- How much there is to do
- How many rooms, windows or areas are involved
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- How many joints, rooms or windows are involved
- If someone has resealed it before
- Photos by email, if that’s easy
- The address or postcode of the job
We quote each job on its own, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job.
When something else is needed
We’ll always be straight with you, so here’s what sealant cannot fix:
- Cracked brickwork or render that needs a builder or plasterer
- Movement that is more than a sealant joint can take
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly.
Joints and surfaces we work on
- Concrete & block
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
How it works
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours to a few days, depending on the length of joint and the access from start to finish. Inside a flat in Finnieston, the job is planned with you; outside, shared parts may need the factor or other owners involved. Tell us which applies when you book.
- 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.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Tell us if parking is tricky
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, email us at info@mrmastic.co.uk.
Advice
Walls and rooflines in Finnieston
Harled (roughcast) walls are common in Scotland, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface. Much of Glasgow is built from red and blond sandstone, and porous sandstone needs a sealant that will not mark it.
For landlords with property near Exhibition Centre station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Glasgow Gaelic School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Finnieston is about 1 mile north-west of Glasgow, in Glasgow. Every kind of property in Finnieston can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Our Glasgow coverage runs to 183 places, and Finnieston is one of them.
We work across G3, G51 and G11 for external mastic and the streets around it. Whether your property is on Kent Road, Haugh Road and Bunhouse Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out external mastic in Kelvinhaugh (1 mile north-west), Kelvingrove (1 mile north-east), Sandyford (1 mile east), Plantation (1 mile south) and Cessnock (1 mile south-west). We also work in nearby towns such as Langside (3 miles south), Yoker (4 miles north-west), Mount Florida (3 miles south-east), Hillpark (3 miles south), Temple (3 miles north-west) and Merrylee (4 miles south).
What’s near Finnieston
Locally, jobs take us to homes and businesses close to Kelvingrove Park, Old Toll Bar and Glasgow University Library. Nearby too are College of Piping (0.9 miles north), Lorne Street Primary School (0.6 miles south) and St Vincent Street Church (0.9 miles east). Finnieston has its own railway station: Exhibition Centre station. Nearby you will also find Glasgow Science Centre (less than half a mile south-west) and Chinatown (1.1 miles north-east). Not far away are Hogganfield Loch.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Check external joints each spring
- Make sure movement joints aren’t pointed over
- Have failed joints looked at early
- Point out the joints to other trades
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Signs you need external mastic in Finnieston
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
The most common problems we see are:
- Gaps where render, brick and frames meet
- Failed sealant between panels on a façade
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
Homes close to Sandyford Henderson Memorial Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- How the colour is chosen
- Whether VAT is included
- What guarantee comes with the work
- How the joint is cleaned and prepared
Finnieston questions
Who arranges sealant work on the shared parts of a tenement in Finnieston?
Shared parts of a tenement, such as the roof and outside walls, are normally repaired with the agreement of the owners, often through a property factor. The Tenements (Scotland) Act 2004 sets out how that works where the title deeds don’t. Windows often belong to the individual flat, but it’s worth checking your deeds.
I let a flat near Exhibition Centre station. Can you help?
Yes, we work for letting agents and landlords. Just send an email to info@mrmastic.co.uk and tell us about the property, and we will send you a clear quote.
Do you come to Finnieston?
Yes, we do. Our applicators work in Finnieston, and the service is the same as everywhere else.
Where is Mr Mastic based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Do you use backing rod?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before any work starts from the range available.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Why deal with it now?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last so it’s worth doing right. Private landlords in Finnieston must meet the Repairing Standard, and damp or leaks can fall short of it, so it’s worth fixing failed sealant before a tenant reports it.
No two jobs are quite the same, so each one gets its own quote. 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.
Why book with us
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
- 180+ five-star Google reviews
- Homes, businesses and hotels
Take a look at how sealant jobs are priced and our reviews.