South Lanarkshire · Scotland
External & façade joints in Wiston, South Lanarkshire
External mastic across Wiston and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Movement joints filled with mortar instead of sealant
- Rain getting behind render or cladding at a joint
- Sealant that has lost its bond to the brick or render
Common questions in Wiston
Do you cover Wiston for external mastic?
Yes, Wiston is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and tell us what needs doing, and we will give you a clear quote.
Is Wiston within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that generally means someone at home.
Can you reach joints on upper floors?
Each building is different. Send us pictures and a rough idea of the height, and we’ll confirm what access is needed.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we are using and why.
What is a movement joint?
A vertical gap in a long brick wall is usually a movement joint. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
About our external mastic in Wiston
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. Common call-outs are for hard, crazed mastic that has stopped moving and sealant pulling away from one side of the joint, across brickwork movement joints, copings & trims and render & cladding joints.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Gutter joints and wall joints take a battering, so they need a sealant that moves with the building.
Your job is guaranteed for a year, as with all our work.
- Where
- Wiston (ML12)
- Region
- South Lanarkshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We work for landlords and agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it and keep the sealant to the right depth.
External mastic in Wiston: local notes
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
If you live in an older home near Wiston Parish Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Wiston is about 13 miles south-east of Carluke, in South Lanarkshire. From the centre of Wiston to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our South Lanarkshire coverage runs to 139 places, Wiston among them. We also work in Edinburgh, around 31 miles away.
Work in ML12 is quoted and booked the same way as anywhere else. Close by, we work in Roberton (2 miles south-west), Symington (3 miles north-east), Thankerton (4 miles north), Coulter (4 miles east) and Carmichael (5 miles north-west). We also work in nearby towns such as Carluke (13 miles north-west), Lanark (9 miles north-west), Lesmahagow (10 miles north-west), Law (15 miles north-west), Biggar (6 miles north-east) and Kirkmuirhill (12 miles north-west).
Near you in Wiston
Other landmarks nearby include Fatlips Castle (1.4 miles north-east).
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Also near Wiston
What else we do in Wiston
Why deal with it now?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Around Wiston, water from a failed joint in an older stone home can soak into timber and plaster.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Why choose Mr Mastic in Wiston
- We’re fully insured
- Homes, businesses and hotels
- Over 20 years’ experience
- ARBOMaster approved applicator
How we quote for external mastic
The quote reflects the job in front of us. We take into account:
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- The type of sealant required
- Whether the work is at height
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What we need to know
When you call or email, these details help:
- The address or postcode of the job
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
What we do, step by step
We bring everything the job needs with us. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. In smaller Scottish places, parking is usually less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- 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.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
- Mention any parking rules near the property
How to get a quote
To get a quote, drop us a line at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
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Common problems we fix in Wiston
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.
Look out for any of the following:
- Old sealant gone brittle and cracked
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
Around Wiston, as everywhere, external mastic is only as good as the preparation behind it.
Comparing quotes
- What the cure time is
- What product goes in the joint
- What preparation is included
- The length of the guarantee