North Lanarkshire · Scotland
External & façade joints in Smithstone, North Lanarkshire
We cover Smithstone for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Joints where the bead has come unstuck
- Failed sealant between panels on a façade
- Water getting into walls through failed joints
What the job involves on each surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so the movement is taken up.
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
About our external mastic in Smithstone
For buildings in Smithstone, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. We work on brickwork movement joints, copings & trims and concrete & block, and people most often call us about damp patches traced to an open external joint and brick movement joints where the sealant has split.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. On newer homes, the movement joints and roofline trims are what need watching.
Every job is covered by a one-year guarantee.
- Where
- Smithstone (G68, G65)
- Region
- North Lanarkshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Smithstone buildings and the weather
Plenty of Scottish homes have harled walls, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Letting a property close to Croy station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Smithstone is about 1 mile west of Cumbernauld, in North Lanarkshire. Anywhere in G68, we cover external mastic for homes and businesses. Our North Lanarkshire coverage runs to 89 places, and Smithstone is one of them. You can also see our page for Glasgow, about 11 miles away.
We cover every part of G68 and G65 for external mastic and the streets around it. Local streets include Taggart Road, Blackwood Road and Old Tower Road, and we cover them all. If you are just outside Smithstone, we cover Balloch (1 mile east), Croy (1 mile north), Craigmarloch (1 mile north-east), Auchinstarry (1 mile north-west) and Westfield (1 mile south). Within a short drive, we also cover Motherwell (11 miles south), Coatbridge (7 miles south), Airdrie (6 miles south), Wishaw (13 miles south), Bellshill (9 miles south) and Burnfoot (6 miles south).
Landmarks near Smithstone
Smithstone has its own railway station: Croy station. Nearby you’ll also find Antonine Centre (1.8 miles east) and Cumbernauld Castle (2.7 miles east). Not far away are Bar Hill and Antermony Loch.
Landlords, agents and businesses in Smithstone
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Towns and villages near Smithstone
Other services in Smithstone
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Your questions about external mastic in Smithstone
I let a flat near Croy station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we will give you a clear quote.
Is Smithstone in your area for external mastic?
Yes, Smithstone is within the area we cover. We work across all of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we will give you a clear price.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Pointing it stops it working. We will reseal it with a flexible sealant.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, large or small.
How long does external mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Common problems we fix in Smithstone
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, and it tears off the sides.
The problems people generally mention when they call include:
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
- Leaking joints around cladding and façade panels
- Moss and dirt in joints with no sealant left
For site and facilities teams at buildings such as Our Lady's High, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before you book
- Whether you can choose the colour
- What guarantee comes with the work
- What product goes in the joint
- Whether they’re fully insured
How to look after the new joints
Aftercare is simple:
- Make sure movement joints are not pointed over
- Ask before painting over external sealant
- Avoid pressure-washing directly into sealant joints
- Get split or bare joints resealed while the damage is small
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Failed render or damaged cladding panels
- Movement that’s more than a sealant joint can take
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just drop us a line at info@mrmastic.co.uk and we will give you a straight answer before you book.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Façade panels
- Concrete & block
- Render & cladding joints
What we do, step by step
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. Somewhere like Smithstone may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- 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.
- 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 sign-in or site rules at work premises
- Mention any tricky access
- Tell us about any water getting in
Getting a quote
If you are in Smithstone and need external mastic, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.