Scottish Borders · Scotland
Sand mastic for sash & case windows in Scottish Borders
Specialist sand mastic for Scottish Borders: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Mastic round period door frames that has failed
- Mastic dropping out of the joint
- Draughty sash windows at the surround
Looking after it afterwards
So the new joints stay in good condition:
- Sort the mastic before the decorators arrive
- Check with your local planning authority if your home is listed
- Clear gutters so water does not pour onto the windows
- Avoid heavy scraping on the mastic joint
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
About our sand mastic in Scottish Borders
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We work on timber door frames, stone surrounds and sash and case windows, and common reasons people get in touch are gaps round a timber door in stone or brick and window mastic to renew ahead of painting.
In and around a place like Scottish Borders, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill.
All of our work is guaranteed for twelve months.
- Place
- Scottish Borders (TD14)
- Region
- Scottish Borders
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
How the job changes by surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair, so check who is responsible first.
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Scottish Borders questions
Does living near the coast affect sand mastic in Scottish Borders?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
I let a flat near Reston station. Can you help?
Yes, rental work is part of what we do. You can drop us a line at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before work begins.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
Do you cover Scottish Borders?
Yes. We’re based in Crawley and work across South East England, London and Scotland, and that includes Scottish Borders.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and finished to sit neatly against the masonry.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
What happens if it’s left?
Draughts round a sash window aren’t always the sashes. Open mastic joints round the box can let air in, and renewing the mastic closes them. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What you get with us
- 180+ five-star Google reviews
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
- Any old sealant cut out fully, not covered over
Read our cost guide and what customers say.
When something else is needed
We’ll always be straight with you, so here’s what sealant cannot fix:
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
- Timber that has rotted
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly before booking.
Where we work in Scottish Borders
- Brick reveals
- Sash and case windows
- Tenement windows
- Period & listed homes
- Timber door frames
- Stone surrounds
The process
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before we start. The work normally takes a few hours for a single window, longer for several. Outside jobs in Scottish Borders need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
Ask for a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, email us at info@mrmastic.co.uk.
Related advice
Landlords, agents and businesses in Scottish Borders
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
More services for Scottish Borders
What affects the quote in Scottish Borders
The quote reflects the job in front of us. We look at:
- Whether the work is at height
- The type of sealant required
- Mould in or behind the old joints
- Any working-time requirements on site
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Photos by email, if that’s easy
- The type of property
- How we’d reach the joints
- If someone has resealed it before
We quote each job on its own, so the first step is telling us about yours. Simply send an email to info@mrmastic.co.uk and describe the job and send pictures if you have them.
Scottish Borders homes and the weather
Scottish Borders is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
In and around Scottish Borders, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint. Rented homes near Reston station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Scottish Borders is in Scotland. Whether you are in the middle of Scottish Borders or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 89 places in the Scottish Borders are on our list, large and small. Our Edinburgh page covers work nearby (41 miles or so).
We work across TD14 for sand mastic. Local streets include West Loch Road, Reston Road and Creel Path, all of which we cover. Close by, we work in 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).
Around Scottish Borders
For rail, the closest station is Reston station, about 3 miles south-west of the centre. Well-known places in the area include Eyemouth Museum (3 miles south-east) and Press Castle (2 miles west). Green spaces nearby include Ayton Hill and Coldingham Loch.