Scottish Borders · Scotland
Sand mastic for sash & case windows in Heriot, Scottish Borders
Sand mastic in Heriot from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- A silicone bead on a sash window that spoils the look
- Tired mastic found when preparing windows for paint
- Old cement repairs round a window that have failed
About our sand mastic in Heriot
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We work on period & listed homes, brick reveals and stone surrounds, and common reasons people get in touch are gaps where the frame meets the masonry and mastic dropping out of the joint.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
The work is covered for a year after we finish. If there’s a problem with it, please send an email to info@mrmastic.co.uk.
- Place
- Heriot (EH38)
- Region
- Scottish Borders
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
FAQs for Heriot
Will you come out to Heriot?
Yes. Heriot is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Is Heriot in your area for sand mastic?
Yes, Heriot is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Is the work guaranteed?
Every job comes with our one-year guarantee.
Is it OK to seal over old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
When to call us in Heriot
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber, and they normally need raking out.
Signs it’s time to call us include:
- Gaps between timber frames and stone or brick
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
- Crumbling sand mastic round a window
For jobs in and around Heriot, choosing the right material for each joint is as important as a tidy finish.
Questions to ask before you book
- Whether all the old sealant comes out first
- How the colour is chosen
- How hidden problems are handled
- What preparation is included
Nearby places to Heriot
More services for Heriot
The process
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours per window, depending on the condition of the joints. In smaller Scottish places, parking is generally less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
Get a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job.
Advice
Honest limits
Before you book, it’s worth knowing the limits too:
- Decayed frames that need repair
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think.
Surfaces we seal
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
Sand mastic in Heriot: local notes
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
In and around Heriot, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Heriot is about 9 miles south-east of Bonnyrigg, in the Scottish Borders. Our applicators cover sand mastic for homes and businesses in Heriot and the surrounding area. Our area takes in 89 places across the Scottish Borders, large and small. Edinburgh is on our list too, about 15 miles from Heriot.
Work in EH38 is quoted and booked the same way as anywhere else. We cover properties on Heriot Way and Shoestanes Road. Neighbouring places we cover for sand mastic include Fountainhall (4 miles south-east), North Middleton (4 miles north-west), Arniston (5 miles north-west), Birkenside (5 miles north-west) and Gorebridge (6 miles north-west). We also work in nearby towns such as Galashiels (13 miles south-east), Peebles (13 miles south-west), Innerleithen (12 miles south), Melrose (15 miles south-east), Earlston (15 miles south-east) and Lauder (9 miles south-east).
Local landmarks in Heriot
Other landmarks nearby include Crichton Castle (4.3 miles north). The countryside around Heriot includes Dun Law.
How the job changes by surface
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Quotes for sand mastic in Heriot
Every job gets its own quote. These are the things that affect it:
- The size of the job
- The product the joint needs
- Access and height
- Any mould that needs treating
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
Before you ask for a quote, have a think about:
- Photos by email, if that is easy
- Where the property is
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Ask a joiner to look at soft timber first
- Renew mastic before redecorating the windows
- Inspect the joints round the windows every year or so
- Avoid heavy scraping on the mastic joint
Leave the new mastic unpainted, which is the traditional advice. If you are redecorating, ask us first.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.