Scottish Borders · Scotland
Window Mastic in St Boswells
Window mastic across St Boswells and nearby, with old sealant always removed completely and a 12-month guarantee.
- Gaps where the sill meets the wall
- Hard, cracked sealant around windows
- Gaps between the frame and the inside reveal
How the visit works
Before we leave, we go over the finished joints with you. The work normally takes most of a day for a typical house, less for a few frames, depending on the amount of work. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
How to get a quote
Want a quote for window mastic? 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
How we handle window mastic in St Boswells
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. Common call-outs are for sealant in the wrong colour for the frame and draughts coming in around windows and doors, on window sills, timber windows & doors and uPVC windows.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain.
There’s a 12-month guarantee on every job, large or small.
- Where
- St Boswells (TD6)
- Wider area
- Scottish Borders
- Cover
- One year on every job
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
How the job changes by surface
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Why deal with it now?
Running fresh sealant over the old joint is tempting, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Around St Boswells, water from a failed joint in an older stone home can soak into timber and plaster.
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why us?
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
- Every job guaranteed for a year
- Colour picked to suit the job
What sealant work can’t fix
It helps to know what we can’t do too:
- Rotten timber, which needs a joiner first
- A failed sealed unit that has misted up
- Broken hinges, locks or handles
Not sure which it is? You can email us at info@mrmastic.co.uk and we’ll tell you honestly before booking.
Surfaces we seal
- Aluminium frames
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows
St Boswells: your questions answered
Can you do window mastic in St Boswells?
Yes. Our work covers the whole of Scotland, and St Boswells is part of that. You can send an email to info@mrmastic.co.uk and tell us what needs doing, 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, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you remove the old sealant?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can resealing stop a draught around my window?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we are ARBOMaster approved applicators.
How long will my window job take?
A handful of frames is a short visit. You’ll get a timescale with the quote.
Are you insured?
Yes, we’re fully insured.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you don’t need to watch us work.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
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 that we can handle for you.
Towns and villages near St Boswells
More services for St Boswells
Windows and doors in St Boswells
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against 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.
For an older house near a landmark such as St Boswells Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
St Boswells is about 7 miles south-east of Galashiels, in the Scottish Borders. If you need window mastic in St Boswells, it’s easy to get a quote: please send an email to info@mrmastic.co.uk. We are based in Crawley and cover the Scottish Borders, St Boswells included. St Boswells is one of 89 towns and villages in the Scottish Borders we cover. Our Edinburgh page covers work nearby (34 miles or so).
Every address in TD6 is covered for window mastic. Local streets include Main Street, Southfield and Weirgate Avenue. You’ll find St Boswells on the A699, which makes it straightforward to reach. If you are just outside St Boswells, we cover 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). We also work in nearby towns such as 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).
Near you in St Boswells
Well-known places in the area include Commendators House Museum (3.6 miles north-west) and Castle Holydean (3.7 miles west). For a walk, there’s Eildon Hill North and Bemersyde Moss.
When to call us in St Boswells
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
People usually contact us when they notice something like this:
- Gaps where the sill meets the wall
- Cracked or shrunken mastic around the frame
- Cracked internal joints between frame and plaster
- A bead that doesn’t match the frame
Around St Boswells, as everywhere, window mastic is only as good as the preparation behind it.
What to look for in a quote
- Whether the sealant suits the joint
- How long to leave it before use
- What the quote includes, VAT included or not
- How much experience the applicator has
Quotes for window mastic in St Boswells
The quote reflects the job in front of us. We take into account:
- The amount of work
- How much old sealant there is and how hard it is to remove
- Access and height
- Whether there’s mould to deal with
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
When you call or email, these details help:
- What’s wrong with the joints now
- The rough size of the job
- Any previous sealing or DIY work
- Any access issues, like height or stairs
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.