Highland · Scotland
Gergask Sand Mastic
Professional sand mastic in and around Gergask, with old sealant always removed completely and a one-year guarantee.
- Mastic dropping out of the joint
- Mastic worn away on windows facing the weather
- Silicone on a period window that looks wrong
How the job changes by surface
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
How we handle sand mastic in Gergask
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. We work on brick reveals, stone surrounds and timber door frames, and people most often call us about gaps between timber frames and stone or brick and mastic dropping out of the joint.
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.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Location
- Gergask (PH20)
- Wider area
- Highland
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Places near Gergask
More services for Gergask
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Keep sills and gutters clear so water drains away
- Do not run silicone over sand mastic
- Sort the mastic before the decorators arrive
- Get any rot dealt with first
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.
Gergask questions
Is there a guarantee on sand mastic in Gergask?
All our work, in Gergask and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Will you come out to Gergask?
Yes, Gergask is covered. We work across all of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Is sand mastic better than silicone for my windows?
It depends on the window. Period windows in stone or brick normally suit sand mastic, while modern frames normally get a flexible sealant.
How long does the job take?
That depends on the amount of work, but most jobs take anything from a few hours to a full day, depending on how many windows. We’ll give you a better idea when we quote.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you will get one quote.
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.
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- How many rooms, windows or areas are involved
- Any mould that needs treating
- Access and height
- The amount of work
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- Where the property is
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
What happens if it’s left?
New mastic over crumbling mastic won’t hold. We remove the loose material first so the new mastic stays put. In an older home around Gergask, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
Homes and businesses are quoted the same way: 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 us?
- ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
- More than 20 years in sealant work
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced or our reviews.
Frames and glazing around Gergask
The west of Scotland is wetter than the east, so there’s plenty of rain for the mastic around older windows and doors to keep out. Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
If you live in an older home near Laggan Parish Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Gergask is about 31 miles south of Inverness, in Highland. Our applicators cover sand mastic for householders, landlords and businesses in Gergask and nearby, as part of our work across Highland. 253 places in Highland are on our list. Our Dundee page covers work nearby, about 62 miles away.
Jobs for sand mastic in PH20 works the same way as everywhere else we cover. We also cover Laggan (1 mile south-east), Etteridge (5 miles east), Dalwhinnie (6 miles south), Newtonmore (7 miles north-east) and Kingussie (10 miles north-east). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
What’s near Gergask
Well-known places in the area include Cluny Castle (2.1 miles east). Not far away are Loch Caoldair and Creag Bhuidhe.
Landlords, agents and businesses in Gergask
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
When to call us in Gergask
Timber frames move with the seasons. The movement cracks the mastic little by little.
The most common problems we see are:
- Mastic round period door frames that has failed
- A silicone bead on a sash window that spoils the look
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
In and around Gergask, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Before booking anyone
- Who turns up on the day
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
What we do, step by step
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. The work normally takes anything from a few hours to a full day, depending on how many windows. Somewhere like Gergask 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.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
- Tell us about any previous sealing or DIY attempts
Ask for a quote
For a quote, email us at info@mrmastic.co.uk with the location and a short description of the problem. You’ll have a clear quote before work begins.