Scottish Borders · Scotland
Sand Mastic in St Boswells
Sand mastic for St Boswells and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
About our sand mastic in St Boswells
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. If you have old cement repairs round a window that have failed and wind and rain getting in round a sash window, we can put it right.
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.
There’s a 12-month guarantee on every job, large or small.
- Location
- St Boswells (TD6)
- Region
- Scottish Borders
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Why deal with it now?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. Around St Boswells, 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.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Why book with us
- 180+ five-star Google reviews
- Homes, businesses and hotels
- A 12-month guarantee on all work
- Fully insured
Read our cost guide or our reviews.
How it works
At the end, we look at the finished work together. The work normally takes a few hours for a single window, longer for several, depending on how much there is to do. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- 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.
Before we arrive
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Mention if the joints have been sealed before
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, email us at info@mrmastic.co.uk.
Advice
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Sashes that rattle, stick or will not open
- Timber that has rotted
- Decisions on consent for listed homes
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Period & listed homes
- Sash and case windows
- Brick reveals
- Timber door frames
- Tenement windows
- Stone surrounds
Also near St Boswells
Other services in St Boswells
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.
Landlord and commercial work in St Boswells
For anyone letting property in or around St Boswells, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
What we are called out for in St Boswells
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
The most common problems we see are:
- Modern sealant on a period surround
- Gaps round a timber door in stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
- Old cement repairs round a window that have failed
Homes close to St Boswells Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Whether they’re fully insured
- How the joint is cleaned and prepared
- What product goes in the joint
- How long to leave it before use
How we quote for sand mastic
Every job gets its own quote. These are the things that affect it:
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- How much there is to do
- Whether there’s mould to deal with
Rather than a set price list, 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.
What we need to know
Before you ask for a quote, have a think about:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- How we’d reach the joints
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Windows and doors in St Boswells
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
Around St Boswells, as everywhere, sand mastic is only as good as the preparation behind it.
St Boswells is about 7 miles south-east of Galashiels, in the Scottish Borders. Every kind of property in St Boswells is covered for sand mastic. The work is guaranteed for a year. 89 places in the Scottish Borders are on our list. For nearby work, see our Edinburgh page.
We work across TD6 for sand mastic and the streets around it. If you need sand mastic at a property on Main Street, Southfield and Weirgate Avenue or anywhere close by, our applicators can take on the job. You’ll find St Boswells on the A699, which makes it straightforward to reach. Nearby, we also carry out sand mastic in Greycrook (1 mile south-east), Maxton (1 mile south-east), Newtown St Boswells (1 mile west), Bowden (3 miles west) and Newstead (3 miles north-west). Within a short drive, we also cover Galashiels (7 miles north-west), Hawick (12 miles south-west), Kelso (8 miles east), Selkirk (8 miles west), Jedburgh (7 miles south-east) and Wilton (12 miles south-west).
Around St Boswells
Nearby you’ll also find Commendators House Museum (3.6 miles north-west) and Castle Holydean (3.7 miles west). Open spaces near St Boswells include Eildon Hill North and Bemersyde Moss.
Common questions in St Boswells
Do you cover St Boswells for sand mastic?
Yes, St Boswells is within the area we cover. Our work covers the whole of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job, and we’ll send you a clear quote.
Do you cover smaller places like St Boswells?
Yes, we do. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
How do I get a quote for sand mastic in St Boswells?
Every job is different, so each one gets its own quote. To get one, send an email to info@mrmastic.co.uk with a short description of the job.
I rent my home. Can I book you?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
How long does the job take?
That depends on how much there is to do, but most jobs take a few hours per window, depending on the condition of the joints. We will tell you when we quote.
Can you quote for more than one area?
Yes. Just list everything you need and we will quote it together.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before resealing.