Na h-Eileanan Siar · Scotland
Leideag Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Leideag. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic worn away on windows facing the weather
- Wind and rain getting in round a sash window
- Gaps between timber frames and stone or brick
How we handle sand mastic in Leideag
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. If you are dealing with draughty sash windows at the surround and silicone on a period window that looks wrong, we can put it right.
In and around a place like Leideag, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Leideag (HS9)
- Region
- Na h-Eileanan Siar
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Surface by surface
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Why deal with it now?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. 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.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why us?
- An ARBOMaster approved applicator
- Fully insured
- Arbo and Everbuild products
- 12-month guarantee on every job
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- How many areas need sealing
- How easy the joints are to reach
- The old material and how stubborn it is
- Mould in or behind the old joints
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What to tell us for a quote
To make quoting easier, please include:
- Any previous sealing or DIY work
- Whether it’s a home or a business
- A few pictures by email, if you can
- Access, such as stairs, a lift or height
Every job is quoted individually. Just drop us a line at info@mrmastic.co.uk with the details and send photos if you have them.
Frames and glazing around Leideag
Leideag is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Island jobs need planning around ferries and the weather, so the more notice, the better.
For an older house near a landmark such as Church of our Lady, the joint between an old wall and a newer frame is usually the first place rain gets in.
Leideag is in Na h-Eileanan Siar. Every kind of property in Leideag can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. We cover 87 towns and villages across Na h-Eileanan Siar, from the larger towns to small villages.
Every address in HS9 is covered for sand mastic. Streets in the area include Pier Road and The Square, and we cover them all. We also cover Castlebay (1 mile north-west), Bàgh a'Chaisteil (1 mile west), Ceann Tangabhal (1 mile north-west), Brèibhig (1 mile north-east) and Cuidhir (3 miles north). If you’re somewhere remote, the job takes a little more planning, so let us know when you get in touch.
What’s near Leideag
Other landmarks nearby include St Brendan's Hospital (0.6 miles west) and Museum Bharraigh Agus Bhatarsaidh (under half a mile north-west). The countryside around Leideag includes Ben Leribreck.
Questions from Leideag
Will you come out to Leideag?
Yes, Leideag is covered. Our work covers the whole of Scotland, islands included, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Leideag in your area for sand mastic?
Yes, Leideag is within the area we cover. Our work covers the whole of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What does sand mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, email us at info@mrmastic.co.uk with a short description of the job.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will talk you through it.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Where are you based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
When to call us in Leideag
Some old mastic was never deep enough. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
Signs it’s time to call us include:
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
Schools such as Castlebay Community School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- Are they insured?
- How the colour is chosen
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes a few hours per window, depending on the condition of the joints. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention any sign-in or site rules at work premises
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
Get a quote
For sand mastic in Leideag, email us at info@mrmastic.co.uk. Tell us what the problem is and where, and we will agree the price before any work begins.
Advice
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Leave the new mastic unpainted
- Keep sills and gutters clear so water drains away
- Plan mastic work ahead of painting
- Go gently near the mastic when preparing windows
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Honest limits
Sealant is not the answer to every problem, and we will tell you before any work starts. It won’t solve:
- Planning or listed building consent (your local planning authority decides)
- Broken panes
- Decayed frames that need repair
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer.
Where we work in Leideag
- Period & listed homes
- Stone surrounds
- Timber door frames
- Tenement windows
- Sash and case windows
- Brick reveals