Highland · Scotland
Duthil External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Duthil and across Highland. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant that has lost its bond to the brick or render
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
External mastic for homes and businesses in Duthil
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. We work on joints between brick and frames, façade panels and brickwork movement joints, and common reasons people get in touch are gaps where render, brick and frames meet and joints pointed up with cement by mistake.
External sealant needs dry surfaces, so outdoor work around Duthil is planned around the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
You get a one-year guarantee, the same in Duthil as everywhere else we work.
- Place
- Duthil (PH23)
- Wider area
- Highland
- Cover
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Keep water from gutters off the wall
- Leave the joints unpainted unless we’ve said otherwise
- Avoid pressure-washing directly into sealant joints
- Tell anyone working on the walls about the movement joints
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Signs you need external mastic in Duthil
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Keep an eye out for these signs:
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
- Gaps where render, brick and frames meet
- Failed sealant between panels on a façade
For an older house near a landmark such as Old Parish Church and Churchyard, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- How long to leave it before use
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
- Who does the work, and how experienced they are
Leave it or put it right?
Sealing over the top of old mastic does not hold for long. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. 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.
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
Why choose Mr Mastic in Duthil
- Sealant colour chosen to suit
- Neat joints and a tidy finish
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
Take a look at our cost guide or customer reviews.
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it generally takes anything from a few hours to several days, depending on the building. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
Get a quote
To get a quote, send an email to info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Related advice
Outside joints around Duthil
Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Letting a property close to Carrbridge station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Duthil is about 20 miles south of Nairn, in Highland. For external mastic in and around Duthil, please drop us a line at info@mrmastic.co.uk for a quick quote. We are based in Crawley and cover Highland, Duthil included. Across Highland, we cover 253 places, Duthil among them. We also work in Aberdeen, around 62 miles away.
Every address in PH23 is covered for external mastic, from the main roads to the quietest streets. Duthil sits on or near the A938, so getting to you is simple. If you are just outside Duthil, we cover Carrbridge (2 miles south-west), Skye of Curr (3 miles east), Boat of Garten (3 miles south), Dulnain Bridge (4 miles east) and Nethy Bridge (5 miles south-east). For island and remote addresses, a little more planning is needed.
Around Duthil
For rail, the closest station is Carrbridge station, roughly 2.8 miles south-west. Well-known places in the area include Muckrach Castle (2.9 miles east). The countryside around Duthil includes Loch Garten.
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Adding movement joints to masonry that has none
- Movement that’s more than a sealant joint can take
- Damp that isn’t coming from the joint
If you are not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before you book.
Joints and surfaces we work on
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Copings & trims
- Brickwork movement joints
- Concrete & block
Different surfaces, different methods
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Places near Duthil
Also in Duthil
Duthil questions
I let a flat near Carrbridge station. Can you help?
Yes, rental work is part of what we do. Just send an email to info@mrmastic.co.uk and tell us about the property, and we will send you a clear quote.
Is Duthil within the area you cover?
Yes, we do. Our work covers the whole of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we’ll quote it together.
How long will you be here?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we’ll tell you how long to expect.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Our work comes with a 12-month guarantee.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.