Argyll and Bute · Scotland
Sand mastic for sash & case windows in Rahane, Argyll and Bute
Our applicators work in Rahane on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Mastic round period door frames that has failed
- Mastic that needs renewing before redecorating
- Mastic worn away on windows facing the weather
Rahane: your questions answered
I let a flat near Garelochhead station. Can you help?
Yes, landlords and agents are among the people we work for. Just email us at info@mrmastic.co.uk with the address and what needs doing, and we’ll give you a clear price.
Is sand mastic in a coastal place like Rahane any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
Is the work guaranteed?
Our 12-month guarantee covers every job.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we will advise.
How we handle sand mastic in Rahane
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. If you are dealing with tired mastic found when preparing windows for paint and old sand mastic that has cracked, crumbled or fallen out, we can help.
Mastic can only go onto a dry joint, so outside work in Rahane depends on the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Each job carries a 12-month guarantee.
- Where
- Rahane (G84)
- Region
- Argyll and Bute
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How the visit works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and clear up. It generally takes a few hours for a single window, longer for several. In smaller Scottish places, parking is normally less of an issue than access and distance. Let us know how to find you and how to reach the joints.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
Get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To get started, send an email to info@mrmastic.co.uk.
Related advice
What affects the cost of sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The old material and how stubborn it is
- Working hours on commercial sites
- Access and height
- Any mould that needs treating
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- The problem you’ve noticed
- The rough size of the job
Every job is quoted individually, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job, and photos are welcome.
Looking after it afterwards
Looking after new joints is easy:
- Make sure water runs off the sill
- Take care around the mastic when scraping paint
- Have rotten timber repaired before new mastic goes in
- Ask the planning authority about consent for listed or conservation-area homes
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, 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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Why it’s worth doing now in Rahane
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
The cost depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before we start.
Why Rahane clients choose us
- Neat joints and a tidy finish
- ARBOMaster approved applicator
- One-year guarantee on every job
- Anti-fungal silicone where joints get wet
Take a look at our cost guide and our reviews.
How the job changes by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Stone surrounds
The stone is treated with care when the old mastic comes out.
Also near Rahane
Other services in Rahane
Windows and doors in Rahane
Rahane 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. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Historic houses such as Hill House, about 4.6 miles south-east, show how far back building around Rahane goes. For landlords with property near Garelochhead station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Rahane is about 5 miles north-west of Helensburgh, in Argyll and Bute. We carry out sand mastic for homes and businesses in Rahane and nearby. We cover 118 towns and villages across Argyll and Bute. Glasgow is on our list too, about 25 miles from Rahane.
Every address in G84 is covered for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Rosneath Road and Peaton Road and the roads around them. Nearby, we also carry out sand mastic in Mambeg (1 mile north), Coulport (1 mile west), Ardpeaton (2 miles south-west), Clynder (2 miles south-east) and Garelochhead (3 miles north). Further out, we also cover Helensburgh (5 miles south-east), Dunoon (7 miles south-west), Rhu (3 miles south-east), Sandbank (6 miles south-west) and Innellan (12 miles south-west).
Near you in Rahane
Rahane’s nearest station is Garelochhead station, roughly 2.3 miles north of the centre. Nearby you will also find Victoria Infirmary (5.5 miles south-east) and Faslane Castle (1.9 miles north-east). The countryside around Rahane includes Clach Bheinn.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.