Highland · Scotland
Thurso Sand Mastic
We cover Thurso for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
Sand mastic in Thurso
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. If you have silicone on a period window that looks wrong and crumbling sand mastic round a window, we can put it right, whatever the surface.
In a town like Thurso, plenty of homes have harled (roughcast) walls, and sealing a frame against rough harling takes a sealant that grips and moves. A bead that sits on top of the harling rather than in the joint soon lets water in.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Thurso (KW14)
- Wider area
- Highland
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Landlord and commercial work in Thurso
Landlords and letting agents in Thurso can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Stone surrounds
- Period & listed homes
- Sash and case windows
- Tenement windows
- Brick reveals
- Timber door frames
FAQs for Thurso
Is Thurso in your area for sand mastic?
Yes, Thurso is within the area we cover. We work across all of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Is sand mastic in a coastal place like Thurso any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They’ll tell you if consent is needed.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply drop us a line at info@mrmastic.co.uk.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
How much does sand mastic cost in Thurso?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Keeping the joints in good condition
So the new joints stay in good condition:
- Ask a joiner to look at soft timber first
- Plan mastic work ahead of painting
- Avoid patching sand mastic with silicone
- Inspect the joints round the windows every year or so
Do not touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. For a job in Thurso, tell us where the work is, how to get in and where to park. Outdoor jobs need a dry day, so they can move if the weather turns.
- 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.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
- Mention any tricky access
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, drop us a line at info@mrmastic.co.uk.
Read more
What affects the cost of sand mastic
Call for a quick quote. What matters most is:
- Working hours on commercial sites
- The size of the job
- Whether there’s mould to deal with
- Which sealant suits the joint
Combining jobs into one visit generally makes better use of the time than several visits. We will send you a clear quote for the lot.
Helping us quote
When you call or email, these details help:
- Any access issues, like height or stairs
- Where the job is, and your postcode
- The type of property
- What’s wrong with the joints now
Every job is quoted individually, so the first step is telling us about yours. Simply email us at info@mrmastic.co.uk and describe the job.
More services for Thurso
Windows and doors in Thurso
Thurso 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 failed outside joints work against that.
For site and facilities teams at buildings such as Thurso High School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Thurso station, any sash windows need sound mastic to keep draughts and rain out.
Thurso is in Highland. If you need sand mastic in Thurso, it’s easy to get a quote: please drop us a line at info@mrmastic.co.uk. We’re based in Crawley and cover Highland. Our Highland coverage runs to 253 places, Thurso among them.
Our applicators cover all of the KW14 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on Sir John's Square, Gerry Square and High Street or a nearby road, we can help. Main roads around Thurso include the A9 and A836. Neighbouring places we cover for sand mastic include Scrabster (2 miles north-west), Glengolly (2 miles south-west), Janetstown (3 miles south-west), Murkle (3 miles east) and Forss (4 miles west). Being one of Highland’s larger places, Thurso has homes, rented property and businesses of every kind. For island and remote addresses, a little more planning is needed, so let us know when you get in touch.
Local landmarks in Thurso
There’s a railway station in Thurso itself: Thurso station. Other landmarks nearby include Scrabster Castle (0.7 miles north-west) and Thurso Heritage Museum (0.6 miles north-west).
Different surfaces, different methods
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
Period and listed homes
Period homes look their best with traditional materials.