South Lanarkshire · Scotland
External Mastic in Lanark
Our applicators work in Lanark on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Panel joints letting water in
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
External mastic for homes and businesses in Lanark
On houses, flats and commercial buildings across Lanark, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you’re dealing with weeds or debris growing in open joints and weathered mastic that no longer stretches, we can help, whatever the surface.
Outside joints can only be sealed when they’re dry, so work in Lanark depends on the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
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.
- Place
- Lanark (ML11)
- Wider area
- South Lanarkshire
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
When to call us in Lanark
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Any of these means the joints need attention:
- Rigid filler in a joint that should flex
- Failed seals between different materials
- Brick movement joints where the sealant has split
- Plants rooting in failed movement joints
Letting a property close to Lanark station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- What happens if they find a problem under the old sealant
- Are they insured?
- How long to leave it before use
- Whether all the old sealant comes out first
Landlords, agents and businesses in Lanark
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Common questions in Lanark
Do you cover Lanark for external mastic?
Yes. We work across all of Scotland, and Lanark is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Is Lanark within the area you cover?
Yes, Lanark is covered. Our work covers the whole of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Is the work guaranteed?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
Are you insured?
Yes. We are fully insured.
Can you seal joints between two different 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.
How long will you be here?
A typical job takes a few hours to a few days, depending on the length of joint and the access. We will confirm how long when we quote.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Where do you work from?
We work from Crawley. Our applicators cover Lanark.
More services for Lanark
How it works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes a few hours to a few days, depending on the length of joint and the access. Outdoor work around Lanark depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved and send you a clear quote.
Advice
External mastic in Lanark: local notes
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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Schools such as Lanark Grammar School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Lanark is about 9 miles south-east of Wishaw, in South Lanarkshire. Whether you’re in the middle of Lanark or further out, we cover external mastic for every kind of property, from flats and houses to offices and hotels. Lanark is one of 139 places in South Lanarkshire where we work. For nearby work, see our Glasgow page, about 23 miles away.
We work across ML11 for external mastic and the streets around it. You will find streets such as High Street, Kildare Road and Kildare Place, and we cover them all. Lanark is on the A72 and A73, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in New Lanark (1 mile south), Kirkfieldbank (1 mile west), Cleghorn (2 miles north-east), Nemphlar (2 miles west) and Cartland (2 miles north-west). Within a short drive, we also cover Hamilton (13 miles north-west), Blantyre (15 miles north-west), Larkhall (9 miles north-west), Carluke (5 miles north-west), Strathaven (11 miles west) and Bothwell (15 miles north-west). As one of the bigger places in South Lanarkshire, Lanark has homes, rented property and businesses of every kind.
Local landmarks in Lanark
Around Lanark, our work takes us to homes and buildings near Delves Park and Maisies pub, among other places. Lanark has its own railway station: Lanark station. Well-known places in the area include Royal Burgh of Lanark Museum (under half a mile west) and Lanark Castle (0.5 miles south-west). The countryside around Lanark includes Lanark Loch and Black Hill.
What we can’t put right
It helps to know what we can’t do too:
- Adding movement joints to masonry that has none
- Movement that is more than a sealant joint can take
- Damp that isn’t coming from the joint
If you are not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer.
Surfaces we seal
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
- Copings & trims
Why deal with it now?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Around Lanark, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
What you pay reflects the work, not guesswork. That’s why we ask about the job first and agree the price before starting.
Why choose Mr Mastic in Lanark
- Colour agreed with you before any work starts
- ARBOMaster approved applicator
- Over 20 years’ experience
- Quality sealants from Arbo and Everbuild
See our cost guide or customer reviews.
How the job changes by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it or an approved alternative. Send us any details you have about the façade.
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.