South Lanarkshire · Scotland
Window & door mastic in Scottish Borders, South Lanarkshire
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Scottish Borders. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Draughty joints inside around the window
- Leaking joints at the ends of sills
- Water coming in at the bottom corners of a door
Scottish Borders questions
Is there a guarantee on window mastic in Scottish Borders?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Can you do window mastic in Scottish Borders?
Yes, Scottish Borders is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear price.
How long before the joint can be used?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Will resealing my frames help with draughts?
Often, yes. The gap between frame and wall is a common source of draughts, and sealing the inside and outside joints closes that path.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Window mastic in Scottish Borders, done properly
Frames and walls don’t move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. If you’re dealing with draughty joints inside around the window and rushed sealant from a window installation, we can put it right, on patio & French doors, window sills and aluminium frames alike.
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.
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.
- Place
- Scottish Borders (ML12)
- Region
- South Lanarkshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What window mastic looks like in Scottish Borders
Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Homes close to Tweedsmuir Parish Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Around Scottish Borders, as everywhere, window mastic is only as good as the preparation behind it.
Scottish Borders is about 22 miles south-east of Carluke, in South Lanarkshire. Whether you’re in the middle of Scottish Borders or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Our South Lanarkshire coverage runs to 139 places, Scottish Borders among them. Edinburgh is on our list too, around 31 miles away.
We cover every part of ML12 for window mastic and the streets around it. You will find Scottish Borders on the A701, which makes it straightforward to reach with everything needed for window mastic. Neighbouring places we cover for window mastic include Broughton (7 miles north), Coulter (7 miles north-west), Biggar (8 miles north-west), Skirling (9 miles north) and Symington (9 miles north-west).
Near you in Scottish Borders
Typical jobs here are in homes near Crook Inn. Well-known places in the area include Oliver Castle (0.9 miles south-west). Open spaces near Scottish Borders include Glenwhappen Rig.
What else we do in Scottish Borders
What affects the cost of window mastic
We don’t publish a price list, because jobs vary so much. The quote depends on:
- The type of sealant required
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The rough size of the job
- The type of property
- Pictures of the joints, sent by email
- The problem you’ve noticed
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Looking after it afterwards
Aftercare is simple:
- Keep solvents and bleach off the sealant
- Avoid blasting the frames with a pressure washer
- Make sure the drainage slots aren’t blocked
- Use gentle cleaners on frames and sealant
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
Why deal with it now?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In an older home around Scottish Borders, damp from a failed joint can get into timber and plaster.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
What you get with us
- Arbo and Everbuild products
- Colour agreed with you before work begins
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
Read our cost guide or what customers say.
Landlord and commercial work in Scottish Borders
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What we do, step by step
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes most of a day for a typical house, less for a few frames, depending on the size of the job. For a place like Scottish Borders, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Clear items away from the joints we are working on
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
How to get a quote
For window mastic in Scottish Borders, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
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What the job involves on each surface
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We’ll point out any rot we find, as a joiner will need to deal with it.
Honest limits
We’d rather tell you now than do work that will not last, so these are the limits:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp problems in the wall away from the window
- A sash or casement that won’t close properly
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer.
Surfaces we seal
- Timber windows & doors
- Composite doors
- Aluminium frames
- Window sills
- uPVC windows
- Patio & French doors