Na h-Eileanan Siar · Scotland
Sand Mastic in Na Gearrannan
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Na Gearrannan, with a one-year guarantee on every job. Call for a quick quote.
- Window mastic to renew ahead of painting
- Failed mastic on an exposed elevation
- Mastic dropping out of the joint
Sand mastic for homes and businesses in Na Gearrannan
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead, and we’ll talk through which suits your home. Common call-outs are for draughts and rain around sash boxes and a silicone bead on a sash window that spoils the look, across brick reveals, stone surrounds and timber door frames.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Na Gearrannan (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What happens if it’s left?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
Why book with us
- Rated 4.9 stars on Google
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- Full insurance on every job
See what affects the cost or our reviews.
When it is not the sealant
We’ll always be straight with you, so here’s what new sealant will not do:
- Masonry that needs repairing
- Cracked or broken glass
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think.
Where we work in Na Gearrannan
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Brick reveals
- Tenement windows
- Timber door frames
Na Gearrannan: your questions answered
Does the coastal weather in Na Gearrannan affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Is Na Gearrannan within the area you cover?
Yes. Na Gearrannan is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland, including the islands, where work is planned around ferry crossings. Let us know about access, parking and anything unusual about getting there when you book.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Can you replace silicone on a period window with sand mastic?
Normally, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Where do you work from?
We work from Crawley. Our applicators cover Na Gearrannan.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Surface by surface
Period and listed homes
Period homes look their best with traditional materials.
Stone surrounds
Stone openings are rarely perfectly straight, so the gap isn’t the same all the way round. We shape it by hand to follow the stone.
Frames and glazing around Na Gearrannan
Na Gearrannan 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.
In and around Na Gearrannan, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Na Gearrannan (Gaelic: Garenin) is in Na h-Eileanan Siar. Na Gearrannan gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Na Gearrannan is one of 87 towns and villages in Na h-Eileanan Siar where we work.
Here we cover the HS2 postcode area for sand mastic. We also cover Carloway (1 mile south-east), Shawbost (4 miles north-east), Breasclete (5 miles south), Bragar (6 miles north-east) and Barabhas (10 miles north-east). For island and remote addresses, a little more planning is needed.
What’s near Na Gearrannan
Other landmarks nearby include Gearannon Blackhouse Village (under half a mile north-west). Open spaces near Na Gearrannan include Loch Langavat.
How it works
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work begins. The work normally takes a few hours per window, depending on the condition of the joints. Somewhere like Na Gearrannan may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- Clear items away from the joints we’re working on
How to get a quote
We quote each job on its own, so start by telling us what you need. Just send an email to info@mrmastic.co.uk with the details and send photos if you have them.
Advice
More services for Na Gearrannan
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
When to call us in Na Gearrannan
Shallow joints are a common cause. Mastic that’s too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Keep an eye out for any of the following:
- Window mastic to renew ahead of painting
- Open joints round the window box
- Weathered mastic on the most exposed windows
- Mastic round period door frames that has failed
For jobs in and around Na Gearrannan, choosing the right material for each joint is as important as a tidy finish.
Before booking anyone
- What the cure time is
- Whether you can choose the colour
- What happens if they find a problem under the old sealant
- Is the old sealant removed completely?
How we quote for sand mastic
The price is agreed before any work begins. It takes into account:
- The amount of work
- The old material and how stubborn it is
- The number of rooms or windows
- Any mould that needs treating
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Roughly how big the job is
- How we’d reach the joints
- The address or postcode of the job
- Pictures of the joints, sent by email
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, email us at info@mrmastic.co.uk.