Scottish Borders · Scotland
Sand mastic for sash & case windows in Gavinton, Scottish Borders
Sand mastic for Gavinton, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Window mastic to renew ahead of painting
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
When something else is needed
Before booking, it’s worth knowing the limits:
- Masonry that needs repairing
- Sashes that rattle, stick or will not open
- Broken panes
If you’re not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Where we work in Gavinton
- Brick reveals
- Timber door frames
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Tenement windows
About our sand mastic in Gavinton
Sand mastic doesn’t last for ever and gaps open up round the frame. We rake it out and renew it and tidies the surround. We work on brick reveals, tenement windows and timber door frames, and the jobs we see most are draughts and rain around sash boxes and crumbling sand mastic round a window.
Mastic can only go onto a dry joint, so outside work in Gavinton depends on the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Location
- Gavinton (TD11)
- Wider area
- Scottish Borders
- Cover
- One year on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Keeping the joints in good condition
So the new joints stay in good condition:
- Ask us before painting near the mastic
- Check the mastic when you check the paintwork
- Have rotten timber repaired before new mastic goes in
- Avoid patching sand mastic with silicone
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Can I do it myself?
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 doesn’t work out, we can still put it right.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Also in Gavinton
Landlords, agents and businesses in Gavinton
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Common questions in Gavinton
Do you cover Gavinton for sand mastic?
Yes. We work across all of Scotland, and Gavinton is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we will give you a clear quote.
Is there a guarantee on sand mastic in Gavinton?
All our work, in Gavinton and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like but the decision is theirs.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
What is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Where do you work from?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Frames and glazing around Gavinton
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
If you look after a building such as Berwickshire High School, its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Gavinton Parish Church and Churchyard, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Gavinton is in the Scottish Borders. Gavinton gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our the Scottish Borders coverage runs to 89 places, and Gavinton is one of them. Our Edinburgh page covers work nearby.
Postcode districts we cover here for sand mastic: TD11. We cover properties on Main Street, South Street and The Glebe and the roads around them. We also cover the places around Gavinton: Clockmill (1 mile north), Duns (1 mile north-east), Preston (3 miles north-east), Swinton (5 miles south-east) and Greenlaw (5 miles south-west). Within a short drive, we also cover Kelso (11 miles south), Eyemouth (13 miles north-east), Earlston (15 miles south-west), Lauder (15 miles west) and Chirnside (7 miles north-east).
Landmarks near Gavinton
Well-known places in the area include Jim Clark Motorsport Museum (1.4 miles north-east) and Langton Castle (1.1 miles north-west). Not far away are Duns Castle nature reserve and Duns Law.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows. For a place like Gavinton, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- 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 isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Let us know if you’ve seen damp or leaks
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, send an email to info@mrmastic.co.uk.
Related advice
Why deal with it now?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Around Gavinton, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
- 180+ five-star Google reviews
- Tidy, careful work
Read what affects the cost or our reviews.
How we quote for sand mastic
There’s no set price list, because no two jobs are the same. What we look at:
- When we can work, for business premises
- Access and height
- How many rooms, windows or areas are involved
- The number and length of the joints
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What to tell us for a quote
To help us quote quickly, please include:
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
- If it’s domestic, commercial or a hotel
- The rough size of the job
Need a quote? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.