Scottish Borders · Scotland
Window & door mastic in Newmill, Scottish Borders
Window and door frames in Newmill need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Leaking joints at the ends of sills
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
Window mastic in Newmill
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. Where the air is getting in through the window itself, we will say so. Typical jobs include gaps left after new windows were fitted and mastic that’s falling out in pieces, on composite doors, window sills and uPVC windows.
In and around a place like Newmill, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain.
Each job carries a 12-month guarantee.
- Place
- Newmill (TD9)
- Wider area
- Scottish Borders
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Leave it or put it right?
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. Around Newmill, 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.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- More than 20 years in sealant work
- Quality sealants from Arbo and Everbuild
- A sealant colour to suit the surroundings
- We never seal over old sealant
Take a look at how sealant jobs are priced or customer reviews.
More services for Newmill
What affects the quote in Newmill
Every job gets its own quote. This is what makes a difference:
- How many areas need sealing
- Any mould that needs treating
- The size of the job
- The product the joint needs
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
What to tell us for a quote
When you contact us, it’s useful to know:
- If it’s domestic, commercial or a hotel
- Where the property is
- Whether it has been sealed before
- The rough size of the job
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we’ll take it from there.
The process
On the day, we start by going over the job with you. We protect the surfaces around the joints before any work starts. The work usually takes a few hours for a handful of frames, longer for a whole house. Somewhere like Newmill 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.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
Getting a quote
To get a quote, email us at info@mrmastic.co.uk with the location and a short description of the problem. We will give you a clear quote before any work starts.
Read more
How the job changes by surface
Composite doors
A composite door usually sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Newmill homes and the weather
Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic. Historic houses like Harden (about 2.9 miles north) are a reminder that the area around Newmill has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Historic houses such as Harden, about 2.9 miles north, show how far back building around Newmill goes. Around Newmill, as everywhere, window mastic is only as good as the preparation behind it.
Newmill is about 4 miles south-west of Hawick, in the Scottish Borders. Whether you are in the middle of Newmill or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 89 places across the Scottish Borders, from the larger towns to small villages. You can also see our page for Edinburgh, roughly 41 miles from Newmill.
Here we cover the TD9 postcode area for window mastic. Being close to the A7, Newmill is simple for us to get to for window mastic. Nearby, we also carry out window mastic in Wilton Dean (4 miles north-east), Wilton (4 miles north-east), Hawick (4 miles north-east), Stirches (5 miles north-east) and Burnfoot (5 miles north-east). Larger places within reach include Selkirk (12 miles north), Jedburgh (14 miles north-east), Denholm (9 miles north-east), Copshaw Holm (14 miles south) and Newtown St Boswells (15 miles north-east).
What’s near Newmill
Well-known places in the area include Branxholme Castle (1.2 miles north-east) and Hawick Cottage Hospital and Lamp Standard (3.8 miles north-east). For a walk, there’s Branxholme Easter Loch.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Looking after it afterwards
So the new joints stay in good condition:
- Keep solvents and bleach off the sealant
- Paint up to the joint, not over it
- Clear any debris from frame drain holes
- Don’t aim a pressure washer at the joints
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Questions from Newmill
Will you come out to Newmill?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with window mastic in Newmill?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Do you remove the old sealant?
Yes, always, and completely. New silicone does not stick to old silicone, so the joint is cleaned back first.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
What we can’t put right
We will not take on work that won’t last, so these are the limits:
- Condensation trapped between the panes
- A sash or casement that will not close properly
- Rotten timber, which needs a joiner first
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly.
What we seal
- Aluminium frames
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows