Argyll and Bute · Scotland
Dunoon Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Dunoon. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
- Draughts and rain around sash boxes
Sand mastic for homes and businesses in Dunoon
We work across Dunoon renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We’re often asked to deal with old cement repairs round a window that have failed and window mastic to renew ahead of painting, across tenement windows, brick reveals and sash and case windows.
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.
There’s a 12-month guarantee on every job.
- Place
- Dunoon (PA23)
- Region
- Argyll and Bute
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What affects the cost of sand mastic
The price is agreed before any work begins. It’s based on:
- Whether the work is at height
- How many rooms, windows or areas are involved
- The number and length of the joints
- Any mould that needs treating
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
Helping us quote
To make quoting easier, please include:
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
- The address or postcode of the job
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Ask a joiner to look at soft timber first
- Inspect the joints round the windows every year or so
- Take care around the mastic when scraping paint
- Keep modern sealant off the mastic
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
When something else is needed
Before you book, it’s worth knowing the limits too:
- Putty and glazing repairs
- Timber that has rotted
- Crumbling stone or brickwork round the window
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think before you book.
Joints and surfaces we work on
- Period & listed homes
- Brick reveals
- Stone surrounds
- Timber door frames
- Tenement windows
- Sash and case windows
What sand mastic looks like in Dunoon
Dunoon 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 older windows and doors, 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.
For an older house near a landmark such as St John’s Church (Dunoon), the joint between an old wall and a newer frame is usually the first place rain gets in. Managing a site like Dunoon Primary School And Janitor's House? Then larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Inverkip station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Dunoon (Gaelic: Dùn Obhainn) is about 6 miles west of Greenock, in Argyll and Bute. Our applicators cover sand mastic for householders, landlords and businesses in Dunoon and nearby, as part of our work across Argyll and Bute. Our area takes in 118 places across Argyll and Bute, large and small. You can also see our page for Glasgow, roughly 26 miles from Dunoon.
Every address in PA23 is within our area for sand mastic, from the main roads to the quietest streets. You’ll find streets such as Queen Street, Queens Court and Pilot Street, all of which we cover. Being close to the A815 and A885, Dunoon is simple for us to get to. Neighbouring places we cover for sand mastic include Kirn (1 mile north-east), Hunters Quay (1 mile north-east), Bullwood (2 miles south), Sandbank (2 miles north) and Strone (2 miles north). Further out, we also cover Helensburgh (9 miles north-east), Rothesay (10 miles south-west), Rhu (7 miles north-east), Garelochhead (10 miles north-east), Port Bannatyne (9 miles south-west) and Innellan (5 miles south). Being one of Argyll and Bute’s larger places, Dunoon has every kind of property, from flats to offices. Remote and island addresses need a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Landmarks near Dunoon
Typical jobs here are in homes near Dunoon Grammar School and the streets around them. Dunoon’s nearest station is Inverkip station, about 3.9 miles south-east of the centre. Nearby you will also find Dunoon Castle (0.6 miles south) and Castle House Museum (0.6 miles south). Not far away are Loch Loskin.
More services for Dunoon
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.
Why it’s worth doing now in Dunoon
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. Around Dunoon, water from a failed joint in an older stone home can soak into timber and plaster.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- Quality sealants from Arbo and Everbuild
- We’re fully insured
- A 12-month guarantee on all work
- 180+ five-star Google reviews
Take a look at how sealant jobs are priced and what customers say.
Common questions in Dunoon
Can you help a landlord with a rental near Inverkip station?
Yes, rental work is part of what we do. You can drop us a line at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before we start.
Will you come out to Dunoon?
Yes, we do. Our work covers the whole of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Are you fully insured?
Yes. We’re fully insured.
Can I choose the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in.
Can old silicone round a sash window be swapped for sand mastic?
Usually, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we are using and why.
How the visit works
We keep the work tidy and contained to the area we are working on, so you can carry on as normal. The job normally takes a few hours for a single window, longer for several, and we tell you how long to leave it before we go. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
- On commercial sites, let us know about site rules
Get a quote
There’s no standard price list. Instead, we give you a clear quote for your job. To arrange one, send an email to info@mrmastic.co.uk.