Highland · Scotland
Janetstown Sand Mastic
We cover Janetstown for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
- Mastic worn away on windows facing the weather
Common questions in Janetstown
Can you help a landlord with a rental near Thurso station?
Yes, we work for landlords and agents. Just send an email to info@mrmastic.co.uk and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like Janetstown?
Yes, we do. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses.
How much does sand mastic cost in Janetstown?
It depends on the job, so we quote each one individually. To get one, email us at info@mrmastic.co.uk with a short description of the job.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Do you offer different sealant colours?
Most of the time, yes. We will tell you which colours the right product comes in.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
About our sand mastic in Janetstown
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We work on period & listed homes, sash and case windows and stone surrounds, and common reasons people get in touch are gaps round a timber door in stone or brick and gaps between timber frames and stone or brick.
Outdoor sealant needs a dry surface, so window work around Janetstown is planned around the weather. Let us know about access to every frame, including any upstairs.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Janetstown (KW14)
- Region
- Highland
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Janetstown homes and the weather
Janetstown is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
Schools such as Thurso High School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Thurso station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Janetstown is about 3 miles south-west of Thurso, in Highland. Every kind of property in Janetstown can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our area takes in 253 places across Highland, large and small.
Jobs for sand mastic in KW14 is quoted and booked the same way as anywhere else. We also cover the places around Janetstown: Glengolly (1 mile east), Westfield (2 miles south-west), Thurso (3 miles north-east), Scrabster (3 miles north) and Forss (3 miles north-west). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Landmarks near Janetstown
For rail, the closest station is Thurso station, about 2.4 miles north-east of the centre. A little further out are Dunbar Hospital (1.8 miles north-east) and Thurso Heritage Museum (2.7 miles north-east). Not far away are Broubster Leans RSPB Reserve and Loch Calder.
Why it’s worth doing now in Janetstown
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why book with us
- Domestic, commercial and hotel work
- Any old sealant cut out fully, not covered over
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at what affects the cost and our reviews.
How it works
Before we leave, we go over the finished joints with you. The visit itself generally takes anything from a few hours to a full day, depending on how many windows, depending on how much there is to do. For a place like Janetstown, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
How to prepare
- Mention any leaks or damp you’ve noticed
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
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
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Look over the window mastic once a year
- Plan mastic work ahead of painting
- Find out about consent before window work on a listed home
- Ask a joiner to look at soft timber first
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Honest limits
New sealant can’t fix everything, and we’d rather say so up front. It will not solve:
- Crumbling stone or brickwork round the window
- Planning or listed building consent (your local planning authority decides)
- Sashes that need overhauling
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly.
Where we work in Janetstown
- Sash and case windows
- Tenement windows
- Period & listed homes
- Brick reveals
- Timber door frames
- Stone surrounds
More services for Janetstown
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.