North Lanarkshire · Scotland
Coatbridge External Mastic
Specialist external mastic for Coatbridge: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
- Failed seals between different materials
How we handle external mastic in Coatbridge
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. We work on façade panels, concrete & block and joints between brick and frames, and people most often call us about weeds or debris growing in open joints and leaking joints around cladding and façade panels.
Scottish weather is hard on outside joints, and a town like Coatbridge gets its share of wind and rain. A gap in a gutter joint, fascia trim or wall joint soon lets damp in.
Every job comes with a 12-month guarantee.
- Place
- Coatbridge (ML5, G69)
- Region
- North Lanarkshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to several days, depending on the building, and the area is left clean. A visit in Coatbridge needs three things planned: access, parking and where the work is. Outside work depends on the weather, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- Mention any parking rules near the property
How to get a quote
We quote each job on its own, so start by telling us what you need. Just email us at info@mrmastic.co.uk with the details.
Related advice
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Walk round the building once a year and look at the joints
- Wash walls gently around the sealant
- Clear growth from the base of walls and joints
- Tell anyone working on the walls about the movement joints
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
External mastic in Coatbridge: local notes
Coatbridge 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. 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.
For landlords with property near Whifflet station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around St Mary's Rc Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Coatbridge is about 9 miles north-east of East Kilbride, in North Lanarkshire. Jobs in Coatbridge get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Coatbridge is one of 89 towns and villages in North Lanarkshire where we work for external mastic. Glasgow is on our list too, about 10 miles from Coatbridge.
All of ML5 and G69 is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on Main Street, Hamilton Crescent and Centenary Gardens and the roads around them. You’ll find Coatbridge on the A8 and A89, so it’s easy for us to get to. Other places close to Coatbridge include Old Monkland (1 mile south-west), Carnbroe (1 mile south-east), Bargeddie (2 miles west), Viewpark (2 miles south-west) and Tannochside (2 miles south-west). Within a short drive, we also cover Motherwell (4 miles south-east), Cumbernauld (7 miles north), Wishaw (7 miles south-east), Bellshill (3 miles south), Kilsyth (9 miles north) and Shotts (9 miles east). Coatbridge is among the bigger towns we cover in North Lanarkshire.
Near you in Coatbridge
In Coatbridge, that means homes and buildings near The Vulcan pub, among other places. Coatbridge has its own railway station: Whifflet station. Other landmarks nearby include Coathill Hospital (within half a mile south) and Summerlee Museum of Scottish Industrial Life (0.9 miles north). For a walk, there’s Strathclyde Loch.
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Places near Coatbridge
Other services in Coatbridge
When to call us in Coatbridge
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. The joint can’t move, so the wall cracks somewhere else instead.
People usually contact us after spotting something like this:
- Plants rooting in failed movement joints
- Joints where the bead has come unstuck
- Rigid filler in a joint that should flex
- Gaps where render, brick and frames meet
For site and facilities teams at buildings such as St. Ambrose High School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- How long the guarantee is
- How much experience the applicator has
- Whether all the old sealant comes out first
- How the colour is chosen
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- When we can work, for business premises
- The amount of work
- The type of sealant required
- The old material and how stubborn it is
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Asking for a quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- The address or postcode of the job
- The problem you’ve noticed
- Whether it’s a home or a business
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, email us at info@mrmastic.co.uk.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Subsidence or other structural problems
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Adding movement joints to masonry that has none
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
Where we work in Coatbridge
- Façade panels
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
FAQs for Coatbridge
Can you do external mastic in Coatbridge?
Yes, Coatbridge is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
Do you work for landlords with property near Whifflet station?
Yes, rental work is part of what we do. You can drop us a line at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before work begins.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
What is a movement joint?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
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 will tell you what we’re using.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.