Scottish Borders · Scotland
Longformacus Window Mastic
Window mastic for Longformacus and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Black, perished sealant on frames
- Cracked or shrunken mastic around the frame
- Rushed sealant from a window installation
About our window mastic in Longformacus
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. We work on uPVC windows, window sills and timber windows & doors, and people most often call us about mastic that has split away from the wall and a bead that doesn’t match the frame.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
Every job comes with a one-year guarantee, wherever you are in the Scottish Borders.
- Place
- Longformacus (TD11)
- Wider area
- Scottish Borders
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What happens on the day
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes a morning for a couple of windows and a door. Around Longformacus, distance and access matter more than parking. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
Getting a quote
For window mastic in Longformacus, email us at info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before we start.
Advice
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Keep solvents and bleach off the sealant
- Walk round the house once a year and look at the joints
- Air rooms to keep condensation down around windows
- Keep paint and stain on wooden frames in good order
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
FAQs for Longformacus
Is Longformacus in your area for window mastic?
Yes, Longformacus is within the area we cover. Our work covers the whole of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Is Longformacus within the area you cover?
Yes, Longformacus is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How do I get a quote for window mastic in Longformacus?
It depends on the job, so we quote each one individually. For a quick quote, drop us a line at info@mrmastic.co.uk and tell us what needs doing and where.
How long does it take to reseal the windows on a house?
The work takes a few hours for a few frames, or a day or more for a whole house. Access and the amount of old mastic make the biggest difference.
Can you do the inside joint as well?
Yes. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Can resealing stop a draught around my window?
Yes, if the air is getting in around the frame. If it’s coming through the window seals, we will tell you.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
Can I paint over the new sealant?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Common problems we fix in Longformacus
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
People generally contact us after spotting something like this:
- Cracked internal joints between frame and plaster
- Leaking joints at the ends of sills
- Cold air getting in at the frame edge
- Rain getting in at the frame or under the sill
Around Longformacus, as everywhere, window mastic is only as good as the preparation behind it.
Before you book anyone
- Which colour the sealant will be
- How long to leave it before use
- How the surfaces are prepared before sealing
- How hidden problems are handled
Why it’s worth doing now in Longformacus
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
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. You will know the price before we begin.
What you get with us
- A 12-month guarantee on all work
- Homes, businesses and hotels
- We’re fully insured
- A choice of colours where the product allows
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Longformacus homes and the weather
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Sash and case windows are common in older Scottish homes, 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 Longformacus Parish Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Longformacus is about 15 miles south-east of Haddington, in the Scottish Borders. Jobs in Longformacus get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. 89 places in the Scottish Borders are on our list. You can also see our page for Edinburgh, about 29 miles away.
Every address in TD11 is covered for window mastic. You’ll find streets such as The Row, Duns Road and Gifford Road. If you’re just outside Longformacus, we cover Clockmill (5 miles south-east), Gavinton (6 miles south-east), Westruther (6 miles south-west), Preston (6 miles east) and Duns (6 miles east). Further out, we also cover Kelso (14 miles south), Earlston (14 miles south-west), Lauder (12 miles south-west) and Chirnside (11 miles east).
Landmarks near Longformacus
Nearby you will also find Langton Castle (4.5 miles south-east). The countryside around Longformacus includes Twin Law.
How we quote for window mastic
For a quick quote, just ask. What matters most is:
- The amount of work
- Any working-time requirements on site
- The old material and how stubborn it is
- Access and height
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
There’s no need for technical detail. Just tell us:
- The problem you’ve noticed
- How we’d reach the joints
- Roughly how big the job is
- Pictures of the joints, sent by email
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work and send you a clear quote.