North Ayrshire · Scotland
Lochranza Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Lochranza and across North Ayrshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked mastic round a front door frame
- Modern sealant on a period surround
- Failed mastic on an exposed elevation
How we handle sand mastic in Lochranza
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. Typical jobs include old sand mastic that has cracked, crumbled or fallen out and patchy fillers round a sash window, across brick reveals, tenement windows and sash and case windows.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
You are covered for a year from the day we finish. If anything is not right with it, drop us a line at info@mrmastic.co.uk.
- Location
- Lochranza (KA27)
- Wider area
- North Ayrshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Why act early in Lochranza
Draughts round a sash window aren’t always the sashes. Open mastic joints round the box can let air in and new mastic seals them. Around Lochranza, 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.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first.
Why us?
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- One-year guarantee on every job
- Homes, businesses and hotels
Take a look at what affects the cost or what customers say.
Lochranza questions
Is Lochranza in your area for sand mastic?
Yes, Lochranza is within the area we cover. Our work covers the whole of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job.
Is Lochranza within the area you cover?
Yes. Lochranza is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
How long does sand mastic take to harden?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
How long will you be here?
Typically it takes a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer, and we will tell you how long to expect.
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. Somewhere like Lochranza may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any tricky access
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
How to get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work.
Read more
Lochranza homes and the weather
Lochranza is close to 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. Lochranza is in the west of Scotland, which is wetter than the east, so there’s plenty of rain for the mastic around older windows and doors to keep out.
If you live in an older home near Castlekirk, the joint between an old wall and a newer frame is generally the first place rain gets in.
Lochranza is about 20 miles west of Saltcoats, in North Ayrshire. Wherever you are in the KA27 postcode area, we can carry out sand mastic at your property. Lochranza is one of 53 places in North Ayrshire we cover. For nearby work, see our Glasgow page.
Every address in KA27 is within our area for sand mastic. Local streets include Bearlach Dearg and Newton Road, and we cover them all. Nearby, we also carry out sand mastic in Pirnmill (6 miles south-west), Corrie (8 miles south-east), Whitehouse (10 miles north-west), Kingarth (11 miles east) and An Tairbeart (12 miles north-west). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
What’s near Lochranza
A little further out are Lochranza Castle (under half a mile south). Open spaces near Lochranza include Torr Meadhonach and Loch na Davie.
Different surfaces, different methods
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Common problems we fix in Lochranza
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
These are the problems we’re asked about most:
- Open joints round the window box
- Old cement repairs round a window that have failed
- Cracked mastic round a front door frame
- Wind and rain getting in round a sash window
In and around Lochranza, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- What happens if the job turns out different
- What guarantee comes with the work
- When the joint can take water or movement
- Whether VAT is included
Towns and villages near Lochranza
What else we do in Lochranza
Landlords, agents and businesses in Lochranza
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We also work for property managers and facilities teams in Lochranza and across North Ayrshire. Several sites can be quoted together, and we are fully insured.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
- Do not run silicone over sand mastic
- Ask a joiner to look at soft timber first
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber, which can lead to rot.