Scottish Borders · Scotland
External & façade joints in Scottish Borders
Specialist external mastic for Scottish Borders: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Joints pointed up with cement by mistake
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost, so the problem grows beyond the joint itself. Around Scottish Borders, water from a failed joint in an older stone home can soak into timber and plaster.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Why Scottish Borders customers choose us
- Colour picked to suit the job
- 20+ years of sealant experience
- You choose the colour before work begins
- A choice of colours where the product allows
See what affects the cost and customer reviews.
How we handle external mastic in Scottish Borders
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on concrete & block, copings & trims and brickwork movement joints, and common reasons people get in touch are weeds or debris growing in open joints and rigid filler in a joint that should flex.
External sealant needs dry surfaces, so outdoor work around Scottish Borders is planned around the weather. Tell us how to reach each wall, gutter and roofline.
Every job comes with our 12-month guarantee.
- Location
- Scottish Borders (TD14)
- Region
- Scottish Borders
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Different surfaces, different methods
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
More services for Scottish Borders
Scottish Borders: your questions answered
Can you help a landlord with a rental near Reston station?
Yes, we work for landlords and agents. Just email us at info@mrmastic.co.uk and tell us about the property, and we will send you a clear quote.
Is Scottish Borders 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.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Is it OK to fill a movement joint with cement?
No. Rigid materials cannot move with the wall. If it has already been filled, we can usually cut it out and reseal it.
How long will you be here?
A typical job takes a few hours for a handful of joints, longer for a whole elevation. We will confirm how long when we quote.
How do you reach high-level joints?
Each building is different. Tell us the height, the number of joints and what’s below them, and we’ll confirm what access is needed.
Where is Mr Mastic based?
We work from Crawley. We cover Scottish Borders, along with the rest of our area.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Deal with leaking gutters that soak the joints below
- Ask before painting over external sealant
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint cannot move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Landlords and agents in Scottish Borders can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
How the visit works
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. Around Scottish Borders, distance and access matter more than parking. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
Getting a quote
If you are in Scottish Borders and need external mastic, send an email to info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
External mastic in Scottish Borders: local notes
Scottish Borders is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
In and around Scottish Borders, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Scottish Borders is in Scotland. For external mastic in and around Scottish Borders, it’s easy to get a quote: please send an email to info@mrmastic.co.uk. We are based in Crawley and cover the Scottish Borders included. 89 places in the Scottish Borders are on our list, from the larger towns to small villages. Edinburgh is on our list too, around 41 miles away.
Postcode districts we cover here for external mastic: TD14. We cover properties on West Loch Road, Reston Road and Creel Path and the roads around them. If you’re just outside Scottish Borders, we cover Coldingham (1 mile south), St Abbs (1 mile north-east), Eyemouth (3 miles south-east), Reston (3 miles south-west) and Ayton (3 miles south).
Local landmarks in Scottish Borders
For rail, the closest station is Reston station, roughly 3 miles south-west. Other landmarks nearby include Eyemouth Museum (3 miles south-east) and Press Castle (2 miles west). For a walk, there’s Ayton Hill and Coldingham Loch.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Cracks in the bricks or render themselves, away from the joints
- Rising or penetrating damp from elsewhere in the wall
- Render that’s blown, hollow or coming away
If in doubt, email us at info@mrmastic.co.uk and we will say what we think.
Where we work in Scottish Borders
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Concrete & block
- Joints between brick and frames
Do you need external mastic in Scottish Borders?
If plants are growing out of a joint, the sealant has usually failed or was never there. Roots and dirt hold water against the wall and speed up the damage.
Look out for any of the following:
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Leaking joints around cladding and façade panels
Letting a property close to Reston station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- Are they insured?
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
- How hidden problems are handled