Scottish Borders · Scotland
External & façade joints in Nether Blainslie, Scottish Borders
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Nether Blainslie. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked joints where brick meets render or frames
- Movement joints with cracked, split or missing sealant
- Joints pointed up with cement by mistake
The process
On the day, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Around Nether Blainslie, 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.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Mention any parking rules near the property
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, send an email to info@mrmastic.co.uk.
Advice
About our external mastic in Nether Blainslie
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. We are often asked to deal with leaking joints around cladding and façade panels and movement joints filled with mortar instead of sealant, on concrete & block, copings & trims and render & cladding joints.
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.
Our work is backed for twelve months.
- Place
- Nether Blainslie (TD1)
- Wider area
- Scottish Borders
- Guarantee
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Also near Nether Blainslie
Also in Nether Blainslie
Honest limits
We will not take on work that won’t last, so these are the limits:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Subsidence or other structural problems
If you are not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before booking.
Surfaces we seal
- Façade panels
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
Surface by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Send us any details you have about the façade.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Nether Blainslie: your questions answered
Is there a guarantee on external mastic in Nether Blainslie?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover smaller places like Nether Blainslie?
Yes, Nether Blainslie is covered. We work across all of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Can a movement joint be filled with mortar?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. We will reseal it with a flexible sealant.
I rent my home. Can I book you?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
What do you need from me for a quote?
Tell us what needs doing and where. If we need more, we will ask.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Outside joints around Nether Blainslie
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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Around Nether Blainslie, as everywhere, external mastic is only as good as the preparation behind it. Whether the job is in Nether Blainslie itself or nearby, the right material for each joint matters as much as a neat finish.
Nether Blainslie is about 6 miles north-east of Galashiels, in the Scottish Borders. Across the TD1 area, our applicators can take on external mastic. We cover 89 towns and villages across the Scottish Borders. Edinburgh is on our list too, around 26 miles away.
All of TD1 is within our area for external mastic. We also cover Lauder (3 miles north-west), Earlston (4 miles south-east), Gattonside (5 miles south), Stow (5 miles west) and Langlee (6 miles south-west). We also work in nearby towns such as Galashiels (6 miles south-west), Kelso (13 miles south-east), Selkirk (10 miles south-west), Innerleithen (14 miles west), Melrose (6 miles south) and St Boswells (8 miles south).
Near you in Nether Blainslie
Well-known places in the area include Old Thirlestane Castle (2.6 miles north-east).
Aftercare tips
To keep the joints looking good and working properly:
- Make sure movement joints aren’t pointed over
- Check external joints each spring
- Tell anyone working on the walls about the movement joints
- Don’t let climbing plants root in the sealant
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
Why it’s worth doing now in Nether Blainslie
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. Around Nether Blainslie, 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.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Nether Blainslie
- Colour agreed with you before we start
- We never seal over old sealant
- 20+ years of sealant experience
- 180+ five-star Google reviews
Take a look at what affects the cost and our reviews.
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- The number of rooms or windows
- The old material and how stubborn it is
- Any mould that needs treating
- The product the joint needs
Leaving a failed joint normally makes the job bigger, not smaller. If you are not sure whether it needs doing, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The rough size of the job
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Where the property is
Need a quote? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.