Scottish Borders · Scotland
Chirnside Sand Mastic
Our applicators work in Chirnside on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
Leave it or put it right?
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new mastic stays put. In an older home around Chirnside, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What you get with us
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- Homes, businesses and hotels
- We are fully insured
See our cost guide or customer reviews.
About our sand mastic in Chirnside
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It’s a good fit for period properties where a modern sealant bead would stand out. We work on period & listed homes, sash and case windows and tenement windows, and common reasons people get in touch are old cement repairs round a window that have failed and gaps between timber frames and stone or brick.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Wind-driven rain finds any gap around a frame or sill, so the mastic there works hard.
You get a 12-month guarantee, the same in Chirnside as everywhere else we work.
- Location
- Chirnside (TD11)
- Region
- Scottish Borders
- Cover
- One year on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Questions from Chirnside
Is Chirnside within the area you cover?
Yes. Chirnside is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Reston station?
Yes, rental work is part of what we do. Just email us at info@mrmastic.co.uk and tell us about the property, and we will give you a clear price.
Can old silicone round a sash window be swapped for sand mastic?
In most cases. We remove the silicone and clean the joint, then point it with sand mastic.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Are you insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
How long does sand mastic take to harden?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours for a single window, longer for several. We’ll tell you when we quote.
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- The number of rooms or windows
- The type of sealant required
- Whether there’s mould to deal with
- The size of the job
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
What to tell us for a quote
To make quoting easier, let us know:
- Any access issues, like height or stairs
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, send an email to info@mrmastic.co.uk.
Frames and glazing around Chirnside
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. 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.
If you look after a building such as Chirnside Primary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around North Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Reston station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Chirnside is in the Scottish Borders. Anywhere in TD11, we cover sand mastic for homes and businesses. Across the Scottish Borders, we cover 89 places, Chirnside among them. We also work in Edinburgh, about 40 miles from Chirnside.
Jobs for sand mastic in TD11 is quoted and booked the same way as anywhere else. Whether your property is on Main Street West End, Main Street East End and Windram Road or a nearby road, our applicators can take on the job. Other places close to Chirnside include Reston (4 miles north), Ayton (4 miles north-east) and Preston (5 miles west).
What’s near Chirnside
Chirnside’s nearest station is Reston station, about 3.5 miles north. Other landmarks nearby include Blackadder House (1.6 miles south-west) and Knoll Hospital (5.3 miles west).
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes a few hours for a single window, longer for several. 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, and the visit is planned around that.
- Each surround is checked first.
- 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.
- The finish is dressed neatly.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
How to get a quote
For a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. We’ll send you a clear quote before any work starts.
Related advice
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
We work for letting agents and landlords as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Get any rot dealt with first
- Inspect the joints round the windows every year or so
- Don’t run silicone over sand mastic
- Ask the planning authority about consent for listed or conservation-area homes
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
Surface by surface
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. It’s renewed by hand.
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.