Highland · Scotland
Hastigrow Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Hastigrow and across Highland. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Modern sealant on a period surround
- Mastic round period door frames that has failed
- Mastic worn away on windows facing the weather
Sand mastic in Hastigrow: local notes
Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Whether the job is in Hastigrow itself or nearby, the right material for each joint matters as much as a neat finish.
Hastigrow is about 10 miles south-east of Thurso, in Highland. We carry out sand mastic for homeowners, landlords and businesses in Hastigrow and nearby, as part of our work across Highland. Hastigrow is one of 253 towns and villages in Highland where we work.
Work in KW1 is quoted and booked the same way as anywhere else. Hastigrow is on the B876, so it’s easy for us to get to. Nearby, we also carry out sand mastic in Bower (2 miles north-west), Gillock (3 miles west), Watten (4 miles south), Keiss (5 miles east) and Reiss (6 miles south-east). Remote and island addresses need a little more planning, so please mention your location when you drop us a line at info@mrmastic.co.uk.
Local landmarks in Hastigrow
Not far away are Loch Watten.
About our sand mastic in Hastigrow
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We work on tenement windows, sash and case windows and stone surrounds, and the jobs we see most are old sand mastic that has cracked, crumbled or fallen out and mastic that needs renewing before redecorating.
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.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Location
- Hastigrow (KW1)
- Wider area
- Highland
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Common problems we fix in Hastigrow
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Any of these means the joints need attention:
- A silicone bead on a sash window that spoils the look
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
Around Hastigrow, as everywhere, sand mastic is only as good as the preparation behind it.
What your quote should include
- Whether the sealant suits the joint
- Who turns up on the day
- Are they insured?
- How long to leave it before use
Aftercare tips
Aftercare is simple:
- Avoid patching sand mastic with silicone
- Ask the planning authority about consent for listed or conservation-area homes
- Inspect the joints round the windows every year or so
- Make sure water runs off the sill
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Your questions about sand mastic in Hastigrow
Is Hastigrow within the area you cover?
Yes. Hastigrow is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Is sand mastic in Hastigrow guaranteed?
All our work, in Hastigrow and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
How long will you be here?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
The process
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. Around Hastigrow, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Try not to wet indoor joints just before the visit
- Mention any sign-in or site rules at work premises
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, email us at info@mrmastic.co.uk.
Related advice
What happens if it’s left?
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Why us?
- We are fully insured
- Anti-fungal silicone where joints get wet
- Quality sealants from Arbo and Everbuild
- 180+ five-star Google reviews
See what affects the cost and our reviews.
More services for Hastigrow
Surface by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.