Highland · Scotland
Caol External Mastic
Specialist external mastic for Caol: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Sealant pulling away from one side of the joint
- Failed seals between different materials
- Failed sealant between panels on a façade
External mastic in Caol, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We strip the joint back and start again. We work on render & cladding joints, copings & trims and concrete & block, and people most often call us about brick movement joints where the sealant has split and panel joints letting water in.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Outside joints on exposed walls work hard.
Big or small, it’s backed by our 12-month guarantee in Caol and across Highland.
- Where
- Caol (PH33)
- Region
- Highland
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Outside joints around Caol
Caol is within about 2 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 movement joints and outside wall joints, especially on the side facing the sea. The west of Scotland is wetter than the east, which means movement joints and outside wall joints has to cope with a lot of rain.
In and around Caol, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Caol is in Highland. Caol gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Across Highland, we cover 253 places, and Caol is one of them. Glasgow is on our list too, about 75 miles from Caol.
Every address in PH33 is covered for external mastic. Local streets include Glen Nevis Road, Camesky Road and Macquarrie Court. If you are just outside Caol, we cover Taobh Lochaidh (1 mile east), Banbhaidh (1 mile north), Inverlochy (1 mile south), Corpach (1 mile north-west) and Fort William (2 miles south). If you’re somewhere remote, the job takes a little more planning, so mention it when you ask for a quote.
Landmarks near Caol
Around Caol, our work takes us to homes and buildings near Black Parks and Lochaber High School. Caol has its own railway station: Banavie station. Well-known places in the area include Treasures Of The Earth (1.1 miles west) and Belford Hospital (1.3 miles south).
Towns and villages near Caol
More services for Caol
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Loose or hollow render, which needs re-rendering
- Subsidence or other structural problems
- Damp that isn’t coming from the joint
If in doubt, email us at info@mrmastic.co.uk and we will say what we think.
Joints and surfaces we work on
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Façade panels
- Concrete & block
Leave it or put it right?
A failed movement joint lets water into the wall and can run behind render or cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Why Caol clients choose us
- Over 20 years’ experience
- Tidy, careful work
- One-year guarantee on every job
- Rated 4.9 stars on Google
Take a look at what affects the cost or customer reviews.
Landlord and commercial work in Caol
In hotels, rooms out of use cost money, 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.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we are fully insured.
Caol questions
Is Caol within the area you cover?
Yes, Caol is covered. We work across all of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Banavie station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can email us at info@mrmastic.co.uk with the details for a clear quote.
What information do you need?
Let us know what needs doing and where, plus photos if you have them. We’ll ask anything else we need to know.
Where is Mr Mastic based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Can you reach joints on upper floors?
It depends on the building. Send us pictures and a rough idea of the height and we’ll confirm how they can be reached safely.
Do you guarantee your work?
Yes. There’s a 12-month guarantee on every job, large or small.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you when we finish.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints.
Signs you need external mastic in Caol
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
The problems people generally mention when they call include:
- Water getting into walls through failed joints
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
If you let a flat or house near Banavie station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before booking anyone
- What the cure time is
- What preparation is included
- Whether the sealant suits the joint
- Are they insured?
How we quote for external mastic
Every job gets its own quote. This is what makes a difference:
- The size of the job
- Working hours on commercial sites
- How easy the joints are to reach
- The product the joint needs
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- How we’d reach the joints
- The address or postcode of the job
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
If you are in Caol and need external mastic, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
The process
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. Outside jobs in Caol need a dry day, because sealant won’t bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Move anything stored near the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
Get a quote
For a quote, email us at info@mrmastic.co.uk with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Advice
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.