Argyll and Bute · Scotland
Sand mastic for sash & case windows in Innellan, Argyll and Bute
Professional sand mastic in and around Innellan, with every bit of old sealant taken out first.
- Old cement repairs round a window that have failed
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
Innellan homes and the weather
Innellan 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’s hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Castle Toward (about 2.4 miles south-west) are a reminder that the area around Innellan has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Historic houses such as Castle Toward, about 2.4 miles south-west, show how far back building around Innellan goes, and older homes nearby need a sealant that suits their walls.
Innellan is about 8 miles south-west of Greenock, in Argyll and Bute. Every kind of property in Innellan can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Innellan is one of 118 places in Argyll and Bute where we work for sand mastic. There’s also a page for Glasgow, roughly 27 miles from Innellan.
Postcode districts we cover here for sand mastic: PA23. That includes homes and businesses on Newton Road, Shore Road and Wyndham Road. We also cover the places around Innellan: Toward (1 mile south-west), Wemyss Bay (3 miles east), Bullwood (3 miles north), Skelmorlie (3 miles south-east) and Inverkip (4 miles east). Within a short drive, we also cover Helensburgh (12 miles north-east), Dunoon (5 miles north), Rothesay (5 miles south-west), Rhu (11 miles north-east), Garelochhead (14 miles north) and Port Bannatyne (5 miles south-west). For island and remote addresses, the job takes a little more planning, so mention it when you ask for a quote.
Local landmarks in Innellan
Innellan’s nearest station is Wemyss Bay station, roughly 3 miles east. Other landmarks nearby include Cowal Community Hospital (5 miles north) and Knockamillie Castle (0.6 miles north-east).
How we handle sand mastic in Innellan
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. We work on stone surrounds, period & listed homes and brick reveals, and common reasons people get in touch are gaps round a timber door in stone or brick and old sand mastic that has cracked, crumbled or fallen out.
Mastic can only go onto a dry joint, so outside work in Innellan depends on the weather. Let us know about access to every frame, including any upstairs.
We stand behind the work with a 12-month guarantee.
- Place
- Innellan (PA23)
- Wider area
- Argyll and Bute
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
When to call us in Innellan
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
Common reasons people contact us include:
- Gaps between timber frames and stone or brick
- Window mastic to renew ahead of painting
- Old cement repairs round a window that have failed
- A silicone bead on a sash window that spoils the look
Letting a property close to Wemyss Bay station? Then any sash windows need sound mastic to keep draughts and rain out.
Comparing quotes
- How the joint is cleaned and prepared
- What product goes in the joint
- Whether VAT is included
- Who turns up on the day
How the job changes by surface
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
How it works
The work is kept neat and contained to the area we’re working on, so you can carry on as normal. Expect the work to take a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. For a place like Innellan, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
Get a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
Read more
Why deal with it now?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. In a place like Innellan, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- 4.9 on Google from 180+ five-star reviews
- Fully insured
- Trusted Arbo and Everbuild sealants
- Over 20 years’ experience
Take a look at our cost guide and customer reviews.
Common questions in Innellan
Is sand mastic in a coastal place like Innellan any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Is Innellan within the area you cover?
Yes, we do. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
I rent my home. Can I book you?
Yes. Ask your landlord first, and we can send them the quote if that helps.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you replace silicone on a period window with sand mastic?
Usually, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you don’t need to watch us work.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Landlords, agents and businesses in Innellan
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
If you manage several properties in or around Innellan, several properties can be quoted together. Just tell us the addresses and what each one needs.
Aftercare tips
To keep the joints looking good and working properly:
- Have rotten timber repaired before new mastic goes in
- Ask the planning authority about consent for listed or conservation-area homes
- Ask us before painting near the mastic
- Take care around the mastic when scraping paint
Do not touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Towns and villages near Innellan
What else we do in Innellan
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.