Scottish Borders · Scotland
Belses Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Belses, with a 12-month guarantee on every job. Ask us for a quote.
- Silicone on a period window that looks wrong
- Mastic dropping out of the joint
- Tired mastic found when preparing windows for paint
Sand mastic in Belses
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. Typical jobs include failed mastic on an exposed elevation and old sand mastic that has cracked, crumbled or fallen out, on period & listed homes, timber door frames and stone surrounds.
Outdoor sealant needs a dry surface, so window work around Belses is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Big or small, you get the same 12-month guarantee in Belses and across the Scottish Borders.
- Place
- Belses (TD8)
- Region
- Scottish Borders
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What we can’t put right
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Damaged stone surrounds
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
If you are not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Where we work in Belses
- Tenement windows
- Timber door frames
- Stone surrounds
- Sash and case windows
- Brick reveals
- Period & listed homes
Why it’s worth doing now in Belses
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. In an older home around Belses, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
Why us?
- Arbo and Everbuild products
- Anti-fungal silicone where joints get wet
- We leave the area clean and tidy
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced or our reviews.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- Access and height
- The number of rooms or windows
- Any working-time requirements on site
- The type of sealant required
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What to tell us for a quote
Before you ask for a quote, have a think about:
- The type of property
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
Need a quote? Please drop us a line 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.
Places near Belses
What else we do in Belses
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Do not paint over the new mastic
- Check the mastic when you check the paintwork
- Check with your local planning authority if your home is listed
- Plan mastic work ahead of painting
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
How it works
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. Around Belses, 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 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
- Tell us about access, such as stairs, a lift or high-level joints
- Mention if the joints have been sealed before
How to get a quote
For a quote, email us 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
What the job involves on each surface
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Stone surrounds
Old stone surrounds are often uneven, so the gap isn’t the same all the way round. We shape it by hand to follow the stone.
FAQs for Belses
Is there a guarantee on sand mastic in Belses?
All our work, in Belses and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you cover Belses for sand mastic?
Yes. Our work covers the whole of Scotland, and Belses 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.
Do you work for landlords and businesses?
Yes, often. Several properties can be quoted together, and between tenancies is a good time for the work.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Are you insured?
Yes. Mr Mastic is fully insured.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. If you are redecorating the window, ask us first and we will advise.
Can you replace silicone on a period window with sand mastic?
In most cases. We remove the silicone and clean the joint before the sand mastic goes in.
Windows and doors in Belses
Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional 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 Belses, as everywhere, sand mastic is only as good as the preparation behind it. Whether the job is in Belses itself or nearby, the right material for each joint matters as much as a neat finish.
Belses is about 8 miles north-east of Hawick, in the Scottish Borders. Our applicators cover sand mastic for homeowners, landlords and businesses in Belses, as part of our work across the Scottish Borders. Our the Scottish Borders coverage runs to 89 places, Belses among them. You can also see our page for Edinburgh, about 36 miles away.
We cover every part of the TD8 postcode area for sand mastic. Belses is on the B6400, so it’s easy for us to get to. Close by, we work in Lilliesleaf (2 miles west), Midlem (3 miles north-west), Ancrum (4 miles east), Bowden (4 miles north) and Greycrook (4 miles north-east). Further out, we also cover Galashiels (8 miles north-west), Hawick (8 miles south-west), Kelso (11 miles north-east), Selkirk (7 miles west), Jedburgh (6 miles south-east) and Wilton (8 miles south-west).
What’s near Belses
Other landmarks nearby include Dingleton Hospital (5.4 miles north) and Castle Holydean (3.9 miles north-west). For a walk, there’s Eildon Wester Hill.