South Lanarkshire · Scotland
New Lanark External Mastic
External mastic across New Lanark and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
- Weathered mastic that no longer stretches
How we handle external mastic in New Lanark
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. If you have gaps where render, brick and frames meet and failed sealant between panels on a façade, we can put it right, on concrete & block, brickwork movement joints and render & cladding joints alike.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. Newer houses need their movement joints and roofline trims kept sound.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- New Lanark (ML11)
- Wider area
- South Lanarkshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Signs you need external mastic in New Lanark
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Any of these means the joints need attention:
- Brick movement joints where the sealant has split
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
Managing a site like Lanark Grammar School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
- Are they insured?
Quotes for external mastic in New Lanark
There’s no set price list, because no two jobs are the same. The quote depends on:
- Mould in or behind the old joints
- The number of rooms or windows
- The type of sealant required
- How easy the joints are to reach
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Helping us quote
When you contact us, it’s useful to know:
- Whether it has been sealed before
- Photos by email, if that’s easy
- How we’d reach the joints
- Where the job is, and your postcode
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, drop us a line at info@mrmastic.co.uk.
External mastic in New Lanark: local notes
Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For landlords with property near Lanark station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around New Lanark Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
New Lanark is about 1 mile south of Lanark, in South Lanarkshire. Every kind of property in New Lanark can book us for external mastic. The work is guaranteed for a year. Across South Lanarkshire, we cover 139 places, and New Lanark is one of them. You can also see our page for Glasgow, about 23 miles away.
Jobs for external mastic in ML11 is quoted and booked the same way as anywhere else. If you need external mastic at a property on Braxfield Road, New Lanark Road and Rosedale Street or a nearby road, we can help. Nearby, we also carry out external mastic in Lanark (1 mile north), Kirkfieldbank (1 mile north-west), Nemphlar (2 miles north-west), Cleghorn (2 miles north-east) and Cartland (2 miles north). We also work in nearby towns such as 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).
Around New Lanark
Typical jobs here are in homes near Castlebank Park and The Wee Man's pub and the streets around them. The closest station to New Lanark is Lanark station, about 0.8 miles north-east of the centre. A little further out are William Smellie Memorial Hospital (1 mile north) and New Lanark Visitor Centre (less than half a mile south-east). Green spaces nearby include Lanark Loch and Black Hill.
Landlords, agents and businesses in New Lanark
Housing providers, facilities teams and property managers book us too in New Lanark and across South Lanarkshire. We can quote a run of properties together, and we’re fully insured for the work.
For anyone letting property in or around New Lanark, several properties can go on one quote. Just tell us the addresses and what each one needs.
How to look after the new joints
After the cure time, these simple habits help:
- Get split or bare joints resealed while the damage is small
- Make sure movement joints are not pointed over
- Do not let climbing plants root in the sealant
- Avoid pressure-washing directly into sealant joints
Do not paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years.
Places near New Lanark
Other services in New Lanark
The process
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on how much there is to do. Somewhere like New Lanark may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
- Clear the area around the work
Getting a quote
Need a quote? Please drop us a line at info@mrmastic.co.uk with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Advice
What sealant work can’t fix
Sealant isn’t the answer to every problem, and we will tell you before any work starts. It will not solve:
- Structural movement, which needs a surveyor or engineer
- Render that is blown, hollow or coming away
- Adding movement joints to masonry that has none
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly before booking.
What we seal
- Copings & trims
- Concrete & block
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
Why it’s worth doing now in New Lanark
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last, so it pays to do it properly once. Around New 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.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
What you get with us
- White, clear, grey or another colour, product permitting
- Any old sealant cut out fully, not covered over
- We are fully insured
- Experience in homes, commercial sites and hotels
See our cost guide and what customers say.
Your questions about external mastic in New Lanark
Do you work for landlords with property near Lanark station?
Yes, landlords and agents are among the people we work for. Just send an email to info@mrmastic.co.uk with the address and what needs doing, and we’ll send you a clear quote.
Will you come out to New Lanark?
Yes, New Lanark is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you use backing rod?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Are you insured?
Yes. Mr Mastic is fully insured.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
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. You will get a clear quote before we start.