Scottish Borders · Scotland
Reston Window Mastic
Professional window mastic in and around Reston, with every bit of old sealant taken out first.
- Rain getting in at the frame or under the sill
- Mastic that has split away from the wall
- A bead that doesn’t match the frame
Signs you need window mastic in Reston
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
Most people get in touch after spotting one of these:
- Cracked or shrunken mastic around the frame
- Rain getting in at the frame or under the sill
- Cracked sealant at the sill ends
- Gaps left after new windows were fitted
In the older streets around Reston Church Of Scotland, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- What happens if the job turns out different
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
- Which colour the sealant will be
How we handle window mastic in Reston
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on timber windows & doors, aluminium frames and uPVC windows, and people most often call us about mastic that has split away from the wall and cracked sealant at the sill ends.
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.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Location
- Reston (TD14)
- Region
- Scottish Borders
- Cover
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Window mastic in Reston: local notes
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 sound outside sealant is part of that.
Letting a property close to Reston station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Reston is in the Scottish Borders. Every kind of property in Reston is covered for window mastic. Every job comes with our 12-month guarantee. Reston is one of 89 towns and villages in the Scottish Borders we cover for window mastic. There’s also a page for Edinburgh, roughly 40 miles from Reston.
Jobs for window mastic in TD14 works the same way as everywhere else we cover. We cover properties on Main Street, Ladeside and Newmains Farm Road and the roads around them. Close by, we work in Ayton (3 miles east), Coldingham (3 miles north-east), Scottish Borders (3 miles north-east), Chirnside (4 miles south) and St Abbs (4 miles north-east).
Local landmarks in Reston
Reston has its own railway station: Reston station. Other landmarks nearby include Ferney Castle (1.2 miles south). Not far away are Ayton Hill and Coldingham Loch.
What happens on the day
At the end, we look at the finished work together and explain the cure time. The work normally takes a morning for a couple of windows and a door, depending on the amount of work. Somewhere like Reston may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, email us at info@mrmastic.co.uk.
Related advice
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Common questions in Reston
Do you cover smaller places like Reston?
Yes, we do. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Reston in your area for window mastic?
Yes, Reston is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we’ll give you a clear price.
Can you get sealant to suit coloured frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Can new window sealant be painted?
That depends on the product. Some hybrid sealants can be painted; silicone can’t. Mention any painting plans before we start.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Will there be a smell?
Some sealants have a smell while they cure. Opening a window helps.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Places near Reston
More services for Reston
How the job changes by surface
Patio & French doors
Water at the foot of a door frame is not always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. We’ll point out any rot we find, as a joiner will need to deal with it.
How we quote for window mastic
We quote each job individually. This is what makes a difference:
- Whether there’s mould to deal with
- The number and length of the joints
- Any working-time requirements on site
- The product the joint needs
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Helping us quote
To make quoting easier, let us know:
- Roughly how big the job is
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
If you are in Reston and need window mastic, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and we will agree the price before any work begins.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Avoid blasting the frames with a pressure washer
- Wipe condensation off the frames
- Wash the frames with mild soapy water
- Keep drainage slots and sill grooves clear
Most silicone sealants will not take paint, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.