Highland · Scotland
Sand mastic for sash & case windows in Forss, Highland
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Forss. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cement or filler used on old window joints that has cracked
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
About our sand mastic in Forss
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. Typical jobs include old cement repairs round a window that have failed and modern sealant on a period surround, across sash and case windows, timber door frames and brick reveals.
Mastic can only go onto a dry joint, so outside work in Forss depends on the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
There’s a 12-month guarantee on every job, large or small.
- Place
- Forss (KW14)
- Wider area
- Highland
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Forss questions
Can you help a landlord with a rental near Thurso station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we’ll give you a clear quote.
Is sand mastic in a coastal place like Forss any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours for a single window, longer for several. We will give you a better idea when we quote.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Frames and glazing around Forss
Forss 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.
Letting a property close to Thurso station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Forss is about 4 miles west of Thurso, in Highland. Jobs in Forss get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Forss is one of 253 places in Highland where we work for sand mastic.
Jobs for sand mastic in KW14 works the same way as everywhere else we cover. Neighbouring places we cover for sand mastic include Westfield (3 miles south), Janetstown (3 miles south-east), Scrabster (3 miles east), Glengolly (4 miles south-east) and Thurso (4 miles east). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
What’s near Forss
For rail, the closest station is Thurso station, roughly 4.2 miles east. Nearby you’ll also find Thurso Heritage Museum (3.8 miles east) and Scrabster Castle (3.8 miles east).
Quotes for sand mastic in Forss
For a quick quote, just ask. What matters most is:
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- How easy the joints are to reach
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Asking for a quote
Before you ask for a quote, have a think about:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- The problem you’ve noticed
- A few photos by email, if you can
Want a quote for sand mastic? Please send an email to info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
More services for Forss
Signs you need sand mastic in Forss
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber and we normally remove them.
The problems people usually mention when they call are:
- Gaps where the frame meets the masonry
- Old cement repairs round a window that have failed
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
Around Forss, as everywhere, sand mastic is only as good as the preparation behind it.
Comparing quotes
- Which sealant they’ll use, and why
- How long to leave it before use
- Whether they seal over old material or remove it
- Who turns up on the day
Looking after it afterwards
After the cure time, these simple habits help:
- Have rotten timber repaired before new mastic goes in
- Check the mastic when you check the paintwork
- Plan mastic work ahead of painting
- Find out about consent before window work on a listed home
Do not run silicone over the new mastic. If anything cracks, get it looked at before trying a quick fix.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
What sealant work can’t fix
To be straight with you, there are a few things sealant won’t fix:
- Sash cords, weights and draught-proofing of the sashes
- Whether work needs listed building consent
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think before booking.
Where we work in Forss
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows
- Stone surrounds
- Brick reveals
Different surfaces, different methods
Period and listed homes
A traditional finish suits a period property.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Landlord and commercial work in Forss
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
For anyone letting property in or around Forss, several properties can go on one quote. Send us the addresses and the work at each.
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. Outside jobs in Forss need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any sign-in or site rules at work premises
- For indoor joints, keep the area dry beforehand if you can
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.