Scottish Borders · Scotland
Sand mastic for sash & case windows in Greenlaw, Scottish Borders
Sand mastic across Greenlaw and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
Sand mastic in Greenlaw, done properly
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 and built up by hand. On older homes, it suits the building far better than silicone. If you have modern sealant on a period surround and gaps between timber frames and stone or brick, we can put it right, whatever the surface.
In and around a place like Greenlaw, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill.
Every job comes with a 12-month guarantee.
- Location
- Greenlaw (TD10)
- Region
- Scottish Borders
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Frames and glazing around Greenlaw
Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Around Greenlaw, as everywhere, sand mastic is only as good as the preparation behind it.
Greenlaw is about 15 miles north-east of Galashiels, in the Scottish Borders. If you need sand mastic in Greenlaw, please drop us a line at info@mrmastic.co.uk for a quick quote. We are based in Crawley and cover the Scottish Borders. Greenlaw is one of 89 towns and villages in the Scottish Borders where we work. There’s also a page for Edinburgh, about 33 miles away.
Jobs for sand mastic in TD10 works the same way as everywhere else we cover. You will find streets such as The Square, East High Street and West High Street, all of which we cover. If you’re just outside Greenlaw, we cover Eccles (4 miles south-east), Gordon (4 miles south-west), Stichill (5 miles south), Gavinton (5 miles north-east) and Westruther (5 miles north-west). Larger places within reach include Galashiels (15 miles south-west), Kelso (7 miles south), Duns (7 miles north-east), Melrose (13 miles south-west), Earlston (10 miles south-west) and Lauder (11 miles west).
Local landmarks in Greenlaw
Locally, jobs take us to homes and businesses close to Cross Keys pub. A little further out are Hume Castle (2.9 miles south). Open spaces near Greenlaw include Hule Moss.
Signs you need sand mastic in Greenlaw
Shallow joints are a common cause. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
It’s worth asking for a quote if you see:
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
- Modern sealant on a period surround
In the older streets around Greenlaw Parish Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before you book anyone
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- Whether VAT is included
- How the colour is chosen
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we will tell you before any work starts. It won’t solve:
- Sashes that rattle, stick or will not open
- Decayed frames that need repair
- Broken panes
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Timber door frames
- Sash and case windows
- Stone surrounds
- Brick reveals
- Period & listed homes
- Tenement windows
Your questions about sand mastic in Greenlaw
Is Greenlaw in your area for sand mastic?
Yes, Greenlaw is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
Is sand mastic in Greenlaw guaranteed?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and shaped to suit the surround.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, drop us a line at info@mrmastic.co.uk and let us know what needs doing and where.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What the job involves on each surface
Period and listed homes
A traditional finish suits a period property.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we’ll confirm access.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Renew mastic before redecorating the windows
- Inspect the joints round the windows every year or so
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Places near Greenlaw
Also in Greenlaw
What happens on the day
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. Expect the work to take anything from a few hours to a full day, depending on how many windows. Around Greenlaw, distance and access matter more than parking. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Clear the area around the work
- On commercial sites, let us know about site rules
- Let us know about earlier repairs to the joints
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
Related advice
What affects the quote in Greenlaw
There’s no set price list, because jobs vary so much. What we look at:
- Any mould that needs treating
- The amount of work
- How easy the joints are to reach
- The product the joint needs
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- The address or postcode of the job
- A few pictures by email, if you can
- The rough size of the job
For a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.