Dumfries and Galloway · Scotland
Lockerbie External Mastic
Our applicators work in Lockerbie on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Plants rooting in failed movement joints
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
External mastic in Lockerbie, done properly
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. If you are dealing with joints with sealant missing in places and old sealant gone brittle and cracked, we can put it right.
External sealant needs dry surfaces, so outdoor work around Lockerbie is planned around the weather. Tell us how to reach each wall, gutter and roofline.
You are covered for a year from the day we finish. If anything isn’t right with it, send an email to info@mrmastic.co.uk.
- Place
- Lockerbie (DG11)
- Wider area
- Dumfries and Galloway
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Should I try it myself first?
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.
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.
Honest limits
A few problems are outside what sealant work can do:
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
- Damp that isn’t coming from the joint
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Façade panels
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
Also in Lockerbie
What the job involves on each surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
Walls and rooflines in Lockerbie
Under the Repairing Standard, private landlords in Scotland have to keep homes 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.
For an older house near a landmark such as Holy Trinity R.C. Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Lockerbie Academy? Then its movement joints, gutters and trims need looking after like any other building’s.
Lockerbie is about 11 miles east of Dumfries, in Dumfries and Galloway. Wherever you are in the DG11 postcode area, our applicators can take on external mastic. Lockerbie is one of 138 towns and villages in Dumfries and Galloway where we work for external mastic. We also work in Edinburgh, around 57 miles away.
Work in DG11 works the same way as everywhere else we cover. You’ll find streets such as High Street, Station Road and Goods Station Road. Being close to the A709 and B723, Lockerbie is simple for us to get to. Neighbouring places we cover for external mastic include Halleaths (2 miles west), Hightae (3 miles south-west), Lochmaben (3 miles west), Templand (4 miles north-west) and Corrie Common (5 miles north-east). We also work in nearby towns such as Dumfries (11 miles west), Annan (10 miles south-east), Moffat (15 miles north), Heathhall (9 miles west), Langholm (14 miles east) and Newbridge Drive (11 miles west). Lockerbie is one of the larger places we cover in Dumfries and Galloway.
Landmarks near Lockerbie
Typical jobs here are in homes near Library. Lockerbie has its own railway station: Lockerbie station. A little further out are Lochmaben Castle (2.9 miles west) and Lochmaben Hospital (3.9 miles west). Green spaces nearby include Castle Loch.
When to call us in Lockerbie
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
Most people get in touch after spotting one of these:
- Old sealant gone brittle and cracked
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
If you let a flat or house near Lockerbie station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- How much experience the applicator has
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
- How hidden problems are handled
Your questions about external mastic in Lockerbie
Will you come out to Lockerbie?
Yes. Lockerbie is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Is Lockerbie in your area for external mastic?
Yes. Our work covers the whole of Scotland, and Lockerbie is part of that. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How often do external joints need resealing?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
What colours does the sealant come in?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
Is there a guarantee?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we will sort it.
Work for landlords, hotels and businesses
We work for landlords and agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
For anyone letting property in or around Lockerbie, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. Outside jobs in Lockerbie need a dry day, because sealant won’t bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, drop us a line at info@mrmastic.co.uk.
Related advice
Quotes for external mastic in Lockerbie
Jobs vary more than people expect. The main factors:
- Mould in or behind the old joints
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- The number and length of the joints
What you pay reflects the work, not guesswork. That’s why we ask about the job first and agree the price before starting.
Helping us quote
Before you ask for a quote, have a think about:
- The type of property
- Roughly how big the job is
- Where the job is, and your postcode
- Photos by email, if that’s easy
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.