Argyll and Bute · Scotland
Sand mastic for sash & case windows in Cairndow, Argyll and Bute
Sand mastic in Cairndow from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked mastic round a front door frame
- Silicone on a period window that looks wrong
- Mastic that needs renewing before redecorating
Sand mastic for homes and businesses in Cairndow
Across Cairndow, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on stone surrounds, brick reveals and timber door frames, and people most often call us about tired mastic found when preparing windows for paint and open joints round the window box.
Mastic can only go onto a dry joint, so outside work in Cairndow depends on the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
The work is covered for a year after we finish. If there’s a problem with it, please email us at info@mrmastic.co.uk.
- Location
- Cairndow (PA26)
- Wider area
- Argyll and Bute
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What sand mastic looks like in Cairndow
Cairndow is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
In and around Cairndow, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint. For an older house near a landmark such as Kilmorich Parish Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Cairndow (Gaelic: An Cárn Dubh) is about 19 miles north-west of Helensburgh, in Argyll and Bute. Anywhere in PA26, we can carry out sand mastic at your property. 118 places in Argyll and Bute are on our list, from the larger towns to small villages. There’s also a page for Glasgow, roughly 38 miles from Cairndow.
Work in PA26 is quoted and booked the same way as anywhere else. We also cover the places around Cairndow: Clachan (2 miles north-east), Inveraray (5 miles west), Inbhir Aora (6 miles west), Lochgoilhead (6 miles south) and Strachur (8 miles south-west). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Around Cairndow
Typical jobs here are in homes near Cairndow Inn, among other places. A little further out are Dunderave Castle (2.4 miles west). For a walk, there’s Dun na Cuaiche and Loch Restil.
The process
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours per window, depending on the condition of the joints, including the tidy-up. In smaller Scottish places, parking is generally 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 start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, send an email to info@mrmastic.co.uk.
Advice
Landlords, agents and businesses in Cairndow
We also work for property managers and facilities teams in Cairndow and across Argyll and Bute. We can quote a run of properties together, and we’re fully insured for the work.
We work for letting agents and landlords as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Why act early in Cairndow
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Why Cairndow clients choose us
- Neat joints and a tidy finish
- ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants
Read what affects the cost or our reviews.
How we quote for sand mastic
For a quick quote, just ask. What matters most is:
- Working hours on commercial sites
- Which sealant suits the joint
- How easy the joints are to reach
- How many areas need sealing
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
- Pictures of the joints, sent by email
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Your questions about sand mastic in Cairndow
Is Cairndow within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Does living near the coast affect sand mastic in Cairndow?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Can I add another job to the visit?
Yes, we can. More than one area can go on one quote.
How long does the job take?
Typically it takes anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer.
Can you seal over the old sealant?
No, it won’t last. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Also near Cairndow
Also in Cairndow
How the job changes by surface
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
- Do not run silicone over sand mastic
- Ask a joiner to look at soft timber first
Leave the new mastic unpainted, which is the traditional advice. If you’re redecorating, ask us first.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
When it is not the sealant
Sealant is not the answer to every problem, and we’ll tell you before we start. Sealant won’t put right:
- Sashes that need overhauling
- Cracked or broken glass
- Decisions on consent for listed homes
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
Joints and surfaces we work on
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Tenement windows
- Timber door frames