Scottish Borders · Scotland
Sand mastic for sash & case windows in Newtown St Boswells, Scottish Borders
Problem with your window and door surrounds in Newtown St Boswells? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- A silicone bead on a sash window that spoils the look
- Tired mastic found when preparing windows for paint
- Crumbling sand mastic round a window
About our sand mastic in Newtown St Boswells
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead and we’ll explain which is best for yours. We work on period & listed homes, sash and case windows and tenement windows, and people most often call us about gaps round a timber door in stone or brick and old cement repairs round a window that have failed.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Location
- Newtown St Boswells (TD6)
- Wider area
- Scottish Borders
- Guarantee
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- Which sealant suits the joint
- How many rooms, windows or areas are involved
- The number and length of the joints
- Mould in or behind the old joints
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Ask us for a quote and we will explain what it covers.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- The problem you’ve noticed
- Roughly how big the job is
- Photos by email, if that’s easy
Every job is quoted individually, so start by telling us what you need. Just drop us a line at info@mrmastic.co.uk with the details.
What happens on the day
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to a full day, depending on how many windows. Somewhere like Newtown St Boswells may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Need a quote? Please email us at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Landlords, agents and businesses in Newtown St Boswells
In hotels, rooms out of use cost money, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
For anyone letting property in or around Newtown St Boswells, several properties can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Newtown St Boswells: your questions answered
Can you help a landlord with a rental near Tweedbank station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we will give you a clear quote.
Can you do sand mastic in Newtown St Boswells?
Yes, Newtown St Boswells is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and let us know what needs doing.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant.
Do you need sand mastic in Newtown St Boswells?
Water gets into small cracks in the mastic and loosens it further. Exposed elevations normally fail first.
It’s worth asking for a quote if you see:
- Wind and rain getting in round a sash window
- Mastic dropping out of the joint
- Patchy fillers round a sash window
- Gaps where the frame meets the masonry
Schools such as Newtown Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- Whether the sealant suits the joint
- Is the old sealant removed completely?
- What guarantee comes with the work
- How the colour is chosen
Towns and villages near Newtown St Boswells
Also in Newtown St Boswells
Sand mastic in Newtown St Boswells: local notes
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 let a flat or house near Tweedbank station, any sash windows need sound mastic to keep draughts and rain out.
Newtown St Boswells is about 6 miles south-east of Galashiels, in the Scottish Borders. Jobs in Newtown St Boswells get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Newtown St Boswells is one of 89 places in the Scottish Borders we cover for sand mastic. There’s also a page for Edinburgh, roughly 33 miles from Newtown St Boswells.
Jobs for sand mastic in TD6 works the same way as everywhere else we cover. Local streets include Park Avenue, Park Crescent and Roxburghe Place, all of which we cover. Close by, we work in Bowden (1 mile south-west), St Boswells (1 mile east), Newstead (2 miles north-west), Greycrook (2 miles south-east) and Melrose (2 miles north-west). Within a short drive, we also cover Galashiels (6 miles north-west), Hawick (11 miles south), Kelso (10 miles east), Selkirk (7 miles west), Jedburgh (8 miles south-east) and Wilton (11 miles south-west).
Landmarks near Newtown St Boswells
The nearest railway station is Tweedbank station, about 3.7 miles north-west. Nearby you’ll also find Castle Holydean (2.5 miles south-west) and Commendators House Museum (2.2 miles north-west). Not far away are Bemersyde Moss and Eildon Hill North.
What we cannot put right
We’ll always be straight with you, so here’s what new sealant won’t do:
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
- Sashes that rattle, stick or won’t open
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
Surfaces we seal
- Period & listed homes
- Timber door frames
- Brick reveals
- Sash and case windows
- Tenement windows
- Stone surrounds
Different surfaces, different methods
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Why act early in Newtown St Boswells
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. In a place like Newtown St Boswells, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why us?
- Approved under the ARBOMaster scheme
- Experience in homes, commercial sites and hotels
- 20+ years of sealant experience
- Full insurance on every job
Read what affects the cost or customer reviews.