Scottish Borders · Scotland
External & façade joints in Belses, Scottish Borders
External mastic for Belses, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed seals between different materials
- Plants rooting in failed movement joints
- Joints with sealant missing in places
About our external mastic in Belses
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We work on concrete & block, render & cladding joints and brickwork movement joints, and people most often call us about weathered mastic that no longer stretches and joints pointed up with cement by mistake.
External sealant needs dry surfaces, so outdoor work around Belses is planned around the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Belses (TD8)
- Region
- Scottish Borders
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What happens if it’s left?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. Around Belses, 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.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Belses customers choose us
- Over 20 years’ experience
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- Colour picked to suit the job
See what affects the cost and our reviews.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Signs you need external mastic in Belses
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Signs it’s time to call us include:
- Failed sealant between panels on a façade
- Cracked joints where brick meets render or frames
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
For jobs in and around Belses, choosing the right material for each joint is as important as a tidy finish.
Comparing quotes
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- Whether VAT is included
- How much experience the applicator has
Belses questions
Do you cover smaller places like Belses?
Yes. Belses is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with external mastic in Belses?
All our work, in Belses and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you work at height?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
How do I get a quote for external mastic in Belses?
Every job is different, so each one gets its own quote. For a quick quote, drop us a line at info@mrmastic.co.uk and let us know what needs doing and where.
Do you have insurance?
Yes. Full insurance covers our work.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Belses.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Walls and rooflines in Belses
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
In and around Belses, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Belses is about 8 miles north-east of Hawick, in the Scottish Borders. Belses gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across the Scottish Borders, we cover 89 places, Belses among them. There’s also a page for Edinburgh, roughly 36 miles from Belses.
All of TD8 is covered for external mastic. Belses sits on or near the B6400, which makes travel easy. If you’re just outside Belses, we cover Lilliesleaf (2 miles west), Midlem (3 miles north-west), Ancrum (4 miles east), Bowden (4 miles north) and Greycrook (4 miles north-east). We also work in nearby towns such as Galashiels (8 miles north-west), Hawick (8 miles south-west), Kelso (11 miles north-east), Selkirk (7 miles west), Jedburgh (6 miles south-east) and Wilton (8 miles south-west).
Local landmarks in Belses
Other landmarks nearby include Dingleton Hospital (5.4 miles north) and Castle Holydean (3.9 miles north-west). Open spaces near Belses include Eildon Wester Hill.
What the job involves on each surface
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Nearby places to Belses
What else we do in Belses
What affects the cost of external mastic
We quote each job individually. These are the things that affect it:
- Any mould that needs treating
- The old material and how stubborn it is
- The number of rooms or windows
- When we can work, for business premises
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 the work is at height. We take all of that into account in your quote.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it’s a home or a business
- Roughly how big the job is
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. Outside jobs in Belses need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- 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.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Keep children and pets away from the work area
- Mention any sign-in or site rules at work premises
- Tell us about any previous sealing or DIY attempts
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.