Highland · Scotland
Window & door mastic in Carndu, Highland
Window mastic for Carndu and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
- Sealant in the wrong colour for the frame
Window mastic in Carndu, done properly
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. We’re often asked to deal with black, perished sealant on frames and cracked internal joints between frame and plaster, across composite doors, uPVC windows and patio & French doors.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Carndu (IV40)
- Region
- Highland
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What affects the cost of window mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- How much old sealant there is and how hard it is to remove
- The product the joint needs
- Any mould that needs treating
- Whether the work is at height
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Access, such as stairs, a lift or height
- The rough size of the job
- Any previous sealing or DIY work
- Where the property is
Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand.
What we are called out for in Carndu
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
If you can see any of these, it’s time to have the joints looked at:
- Draughts coming in around windows and doors
- Draughty joints inside around the window
- Mastic that has split away from the wall
- Mastic that is falling out in pieces
In the older streets around St Duthuc's Roman Catholic Chapel, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- The length of the guarantee
- Which colour the sealant will be
- Whether they seal over old material or remove it
- How hidden problems are handled
Places near Carndu
Other services in Carndu
Windows and doors in Carndu
Carndu is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around window and door frames, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Letting a property close to Stromeferry station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Carndu is in Highland. Carndu gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Carndu is one of 253 towns and villages in Highland where we work for window mastic.
Our applicators cover all of IV40 for window mastic. You’ll find streets such as Helen Street, Princes Street and William Street, and we cover them all. We also cover the places around Carndu: Bundalloch (1 mile north-east), Dornie (1 mile south-west), Auchtertyre (3 miles west), Inverinate (5 miles south-east) and Reraig (5 miles west). Remote and island addresses need a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Local landmarks in Carndu
Carndu’s nearest station is Stromeferry station, about 4.8 miles north-west of the centre. Well-known places in the area include Eilean Donan Castle (1.1 miles south-west). The countryside around Carndu includes Loch Anna.
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It normally takes a few hours for a few frames, or a day or more for a whole house. Outdoor work around Carndu depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- 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.
How to prepare
- Tell us if parking is tricky
- Keep children and pets away from the work area
- Tell us about any water getting in
Get a quote
For a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. You’ll have a clear quote before we start.
Read more
When it isn’t the sealant
In fairness, there are a few things sealant won’t fix:
- Broken hinges, locks or handles
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly.
Where we work in Carndu
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Aluminium frames
FAQs for Carndu
Is window mastic in a coastal place like Carndu any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
I let a flat near Stromeferry station. Can you help?
Yes, landlords and agents are among the people we work for. Just send an email to info@mrmastic.co.uk with the address and what needs doing, and we will give you a clear quote.
Do you come to Carndu?
Yes, we do. Carndu is part of the area we cover.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
How do I get a quote for window mastic in Carndu?
Every job is different, so each one gets its own quote. To get one, drop us a line at info@mrmastic.co.uk with a short description of the job.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. We’ll ask anything else we need to know.
Is the new sealant paintable?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Are you fully insured?
Yes. We are fully insured for domestic and commercial work.
Should I try it myself first?
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.
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.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Surface by surface
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We’ll tell you if that is what we find.