Dumfries and Galloway · Scotland
Sand Mastic in Lockerbie
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Lockerbie and across Dumfries and Galloway. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed mastic on an exposed elevation
- Draughty sash windows at the surround
- Cracked mastic round a front door frame
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you’re 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.
Sand mastic in Lockerbie
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We work on period & listed homes, sash and case windows and timber door frames, and common reasons people get in touch are patchy fillers round a sash window and a silicone bead on a sash window that spoils the look.
Outdoor sealant needs a dry surface, so window work around Lockerbie is planned around the weather. Let us know about access to every frame, including any upstairs.
All our work comes with a 12-month guarantee.
- Location
- Lockerbie (DG11)
- Wider area
- Dumfries and Galloway
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What we’re called out for in Lockerbie
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
If you can see any of these, it’s time to have the joints looked at:
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Window mastic to renew ahead of painting
- Open joints round the window box
In the older streets around Holy Trinity R.C. Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- How the joint is cleaned and prepared
- Whether you can choose the colour
- Is VAT in the price?
- Who turns up on the day
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. In a place like Lockerbie, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Doing several joints on one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
What you get with us
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
- Any old sealant cut out fully, not covered over
- An ARBOMaster approved applicator
See what affects the cost or our reviews.
What we do, step by step
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for a single window, longer for several. Outdoor work around Lockerbie depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
Get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, email us at info@mrmastic.co.uk.
Related advice
Questions from Lockerbie
Can you help a landlord with a rental near Lockerbie station?
Yes, rental work is part of what we do. You can send an email to info@mrmastic.co.uk with the address and a few details, and we’ll give you a fixed price before any work starts.
Can you do sand mastic in Lockerbie?
Yes, Lockerbie is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. The old silicone has to come out completely so the mastic can sit properly.
How long does sand mastic take to go off?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Are you fully insured?
Yes. Full insurance covers our work.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
When it isn’t the sealant
To be straight with you, some problems need a different trade:
- Broken panes
- Sashes that rattle, stick or will not open
- Timber that has rotted
If you are not sure, just email us at info@mrmastic.co.uk and we will give you a straight answer before you book.
Where we work in Lockerbie
- Stone surrounds
- Sash and case windows
- Brick reveals
- Period & listed homes
- Timber door frames
- Tenement windows
Lockerbie homes and the weather
Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For site and facilities teams at buildings such as Lockerbie Academy, larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Lockerbie station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Lockerbie is about 11 miles east of Dumfries, in Dumfries and Galloway. From the centre of Lockerbie to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 138 places in Dumfries and Galloway are on our list, large and small. We also work in Edinburgh, about 57 miles from Lockerbie.
Every address in DG11 is covered for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on High Street, Station Road and Goods Station Road or a nearby road, we can help. You’ll find Lockerbie on the A709 and B723, so it’s easy for us to get to. Neighbouring places we cover for sand 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). Within a short drive, we also cover 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
Locally, jobs take us to homes and businesses close to Library. There’s a railway station in Lockerbie itself: Lockerbie station. Other landmarks nearby include Lochmaben Castle (2.9 miles west) and Lochmaben Hospital (3.9 miles west). For a walk, there’s Castle Loch.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Check with your local planning authority if your home is listed
- Don’t run silicone over sand mastic
- Take care around the mastic when scraping paint
- Ask a joiner to look at soft timber first
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
What else we do in Lockerbie
What the job involves on each surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Timber door frames
A neat sand mastic joint round a front door suits a period home.