Highland · Scotland
Sand mastic for sash & case windows in Keiss, Highland
Window and door surrounds in Keiss need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Weathered mastic on the most exposed windows
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
About our sand mastic in Keiss
Across Keiss, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. We work on period & listed homes, brick reveals and stone surrounds, and people most often call us about cracked mastic round a front door frame and weathered mastic on the most exposed windows.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Place
- Keiss (KW1)
- Wider area
- Highland
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What affects the cost of sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Access and height
- The old material and how stubborn it is
- The number of rooms or windows
- Which sealant suits the joint
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, email us at info@mrmastic.co.uk for an honest opinion and a quote.
What to tell us for a quote
To make quoting easier, let us know:
- Where the property is
- How we’d reach the joints
- The problem you’ve noticed
- Whether it has been sealed before
Every job is quoted individually, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job.
What happens if it’s left?
New mastic over crumbling mastic won’t hold. We remove the loose material first so the new work lasts. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Keiss
- We’re fully insured
- Anti-fungal silicone where joints get wet
- 20+ years of sealant experience
- ARBOMaster approved applicator
See our cost guide and our reviews.
What sand mastic looks like in Keiss
Keiss is close to 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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
For an older house near a landmark such as Church of Scotland, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Keiss is about 15 miles east of Thurso, in Highland. Jobs in Keiss get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Keiss is one of 253 towns and villages in Highland where we work for sand mastic.
Work in KW1 works the same way as everywhere else we cover. Local streets include High Street, South Street and Robertson Crescent, all of which we cover. We also cover Reiss (4 miles south), Ackergillshore (4 miles south), Hastigrow (5 miles west), Staxigoe (6 miles south-east) and Haster (6 miles south). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Local landmarks in Keiss
Well-known places in the area include Caithness Broch Centre (2 miles north-east) and Keiss Castle (0.7 miles north-east). The countryside around Keiss includes Loch of Wester.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- Decisions on consent for listed homes
- Putty and glazing repairs
- Crumbling stone or brickwork round the window
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before booking.
Surfaces we seal
- Tenement windows
- Brick reveals
- Sash and case windows
- Period & listed homes
- Timber door frames
- Stone surrounds
Your questions about sand mastic in Keiss
Is Keiss within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Does living near the coast affect sand mastic in Keiss?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
How much does sand mastic cost in Keiss?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Which is right for my windows, sand mastic or modern sealant?
We’ll help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we’re using and why.
More services for Keiss
What we are called out for in Keiss
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint.
Common reasons people contact us are:
- Modern sealant on a period surround
- Cracked mastic round a front door frame
- Patchy fillers round a sash window
- Mastic worn away on windows facing the weather
Around Keiss, as everywhere, sand mastic is only as good as the preparation behind it.
What your quote should include
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
- How long the guarantee is
- What product goes in the joint
How the job changes by surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. If your home is listed, ask your local planning authority about consent.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
How it works
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours per window, depending on the condition of the joints from start to finish. Around Keiss, distance and access matter more than parking. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
How to get a quote
For sand mastic in Keiss, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.