North Ayrshire · Scotland
Sand mastic for sash & case windows in Largs, North Ayrshire
Window and door surrounds in Largs need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
- Patchy fillers round a sash window
Sand mastic for homes and businesses in Largs
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead, and we will talk through which suits your home. If you have patchy fillers round a sash window and failed mastic on an exposed elevation, we can help, whatever the surface.
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.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Largs (KA30)
- Wider area
- North Ayrshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Keep modern sealant off the mastic
- Check with your local planning authority if your home is listed
- Inspect the joints round the windows every year or so
- Leave the new mastic unpainted
Don’t run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
Your questions about sand mastic in Largs
Do you cover smaller places like Largs?
Yes. Largs is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Largs station?
Yes, we work for landlords and letting agents. You can send an email to info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before any work starts.
What is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How long does sand mastic take?
It depends on the size of the job, but as a guide it takes a few hours per window, depending on the condition of the joints. We’ll tell you when we quote.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will advise.
What guarantee comes with the work?
Our 12-month guarantee applies to all our work.
Do you offer different sealant colours?
We’ll suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
Surface by surface
Stone surrounds
The stone is treated with care when the old mastic comes out.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Why deal with it now?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. Around Largs, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will go through it with you.
Why book with us
- Approved under the ARBOMaster scheme
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
- Over 20 years’ experience
See our cost guide and what customers say.
Largs homes and the weather
Largs is close to 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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that.
Letting a property close to Largs station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Largs is about 11 miles south of Greenock, in North Ayrshire. For sand mastic in and around Largs, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We cover North Ayrshire from our Crawley base. Largs is one of 53 places in North Ayrshire we cover. Glasgow is on our list too, about 23 miles from Largs.
Work in KA30 is quoted and booked the same way as anywhere else. Sand mastic is available to properties on Main Street, Harper Crescent and Middleton Drive. You will find Largs on the A78 and A760, so it’s easy for us to get to. If you’re just outside Largs, we cover Fairlie (3 miles south), Millport (4 miles south-west), Skelmorlie (5 miles north), Wemyss Bay (6 miles north) and Toward (7 miles north-west). Further out, we also cover Irvine (15 miles south-east), Kilwinning (12 miles south-east), Saltcoats (11 miles south), Ardrossan (10 miles south), Stevenston (12 miles south) and Kilbirnie (7 miles south-east). Largs is among the bigger towns we cover in North Ayrshire.
Landmarks near Largs
We work in homes and buildings around Largs Campus and The Paddle Steamer pub. There’s a railway station in Largs itself: Largs station. A little further out are Kelburn Castle (1.9 miles south) and Brooksby House (less than half a mile north-west).
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours per window, depending on the condition of the joints. Somewhere like Largs may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Try not to wet indoor joints just before the visit
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we’ll take it from there.
Advice
Common problems we fix in Largs
Age is the main cause. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
It’s worth asking for a quote if you see:
- Mastic that needs renewing before redecorating
- Cracked mastic round a front door frame
- Draughty sash windows at the surround
- Crumbling sand mastic round a window
Managing a site like Largs Academy? Then its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- What product goes in the joint
- Is VAT in the price?
- How the colour is chosen
- What preparation is included
Nearby places to Largs
Also in Largs
Quotes for sand mastic in Largs
For a quick quote, just ask. What matters most is:
- The old material and how stubborn it is
- Which sealant suits the joint
- Mould in or behind the old joints
- When we can work, for business premises
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
What we need to know
To help us quote quickly, please include:
- The type of property
- How we’d reach the joints
- A few photos by email, if you can
- The problem you’ve noticed
Every job is quoted individually. Just drop us a line at info@mrmastic.co.uk with the details, and pictures are welcome.
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Sash cords, weights and draught-proofing of the sashes
- Masonry that needs repairing
- Broken panes
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Surfaces we seal
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
- Timber door frames
- Period & listed homes