Glasgow · Scotland
External Mastic in Kelvindale
Specialist external mastic for Kelvindale: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Rigid filler in a joint that should flex
- Sealant that has lost its bond to the brick or render
- Weeds or debris growing in open joints
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
About our external mastic in Kelvindale
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. If you are dealing with weeds or debris growing in open joints and weathered mastic that no longer stretches, we can put it right.
Gutters and downpipes on tall city tenements are a long way up, and a slow drip can stain and soak the stone for a long time before it’s spotted. In Kelvindale, access needs planning, and work on shared parts may need the other owners’ agreement.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Kelvindale (G12, G20, G13)
- Wider area
- Glasgow
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Common problems we fix in Kelvindale
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
The most common problems we see are:
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Moss and dirt in joints with no sealant left
- Joints with sealant missing in places
For an older house near a landmark such as St John's Renfield Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- How hidden problems are handled
- Whether VAT is included
- Is the old sealant removed completely?
- What insurance they hold
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Towns and villages near Kelvindale
Also in Kelvindale
Landlord and commercial work in Kelvindale
Hotels need rooms back in use, 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.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Walls and rooflines in Kelvindale
Historic houses like Tenement House (about 2.2 miles south-east) are a reminder that the area around Kelvindale has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. The Tenements (Scotland) Act 2004 sets out how owners share the upkeep of common parts like the roof and outside walls, and many buildings use a factor to arrange it. The title deeds set out which parts are common.
Schools such as Cleveden Secondary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Rented homes near Kelvindale station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Kelvindale is about 2 miles south of Bearsden, in Glasgow. Jobs in Kelvindale get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 183 places across Glasgow, large and small.
Our applicators cover all of G12, G20 and G13 for external mastic and the streets around it. External mastic is available to properties on Cowal Road, Foulis Lane and Temple Road. We also cover the places around Kelvindale: Kelvinside (1 mile south-east), Dawsholm (1 mile north), Anniesland Cross (1 mile west), Temple (1 mile west) and Hyndland (1 mile south). Further out, we also cover Glasgow (3 miles south-east), Calton (4 miles south-east), Blythswood Hill (3 miles south-east), Langside (5 miles south), Yoker (3 miles west) and Mount Florida (5 miles south-east).
Near you in Kelvindale
Locally, jobs take us to homes and businesses close to Glasgow University Library, The Esquire House and Dawsholm Park. Kelvindale has its own railway station: Kelvindale station. Nearby you will also find Gartnavel General Hospital (0.5 miles south) and Glasgow Museum of Transport (1.6 miles south). Green spaces nearby include Kilmardinny and Castle Hill.
How the visit works
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours to a few days, depending on the length of joint and the access. In a Scottish city, a lot of jobs are in tenement flats, up a common stair from a shared close. In Kelvindale, it helps to know the floor, the door entry arrangements and the nearest parking.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
Get a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we will take it from there.
Read more
Kelvindale: your questions answered
Can you help a landlord with a rental near Kelvindale station?
Yes, we work for landlords and letting agents. You can drop us a line at info@mrmastic.co.uk with the address and a few details, and we’ll give you a fixed price before work begins.
How do repairs to the shared parts of a tenement in Kelvindale get organised?
Most tenements arrange shared repairs through the owners or a property factor. The Tenements (Scotland) Act 2004 covers the common parts where the deeds do not, and we can quote for the factor or the owners directly.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply drop us a line at info@mrmastic.co.uk.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so it does not stand out.
What happens if it’s left?
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 pays to do it properly once. Wind-driven rain gets into any failed joint on the outside of a city building, and in Kelvindale, damp can spread through stone and plaster before anyone sees it.
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why choose Mr Mastic in Kelvindale
- Rated 4.9 stars on Google
- White, clear, grey or coloured to suit, where the product allows
- Quality sealants from Arbo and Everbuild
- You choose the colour before work begins
Take a look at our cost guide and our reviews.
What sealant work cannot fix
To be straight with you, there are a few things sealant won’t fix:
- Damp that isn’t coming from the joint
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think.
Where we work in Kelvindale
- Render & cladding joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints