Stirling · Scotland
A' Chrìon Làraich External Mastic
External mastic in A' Chrìon Làraich from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Moss and dirt in joints with no sealant left
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
External mastic for homes and businesses in A' Chrìon Làraich
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on brickwork movement joints, render & cladding joints and copings & trims, and people most often call us about gaps where render, brick and frames meet and sealant pulling away from one side of the joint.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. On newer homes, the movement joints and roofline trims are what need watching.
We stand behind the work with a one-year guarantee.
- Location
- A' Chrìon Làraich (FK20)
- Wider area
- Stirling
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Outside joints around A' Chrìon Làraich
The west of Scotland is wetter than the east, so there’s plenty of rain for movement joints and outside wall joints to keep out. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Rented homes near Crianlarich station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Around A' Chrìon Làraich, as everywhere, external mastic is only as good as the preparation behind it.
A' Chrìon Làraich (Gaelic: Crianlarich) is about 27 miles north of Helensburgh, in Stirling. Every kind of property in A' Chrìon Làraich is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our Stirling coverage runs to 55 places, A' Chrìon Làraich among them. You can also see our page for Glasgow, about 40 miles away.
Postcode districts we cover here for external mastic: FK20. Local streets include Main Street, Willow Brae and Meadow Grove. We also cover Tyndrum (5 miles north-west), Clifton (5 miles north-west), Inverarnan (6 miles south-west), Ardlui (8 miles south-west) and An Tairbeart (13 miles south).
Near you in A' Chrìon Làraich
A' Chrìon Làraich has its own railway station: Crianlarich station. A little further out are Loch Dochart (1.4 miles east). The countryside around A' Chrìon Làraich includes Loch Dochart.
FAQs for A' Chrìon Làraich
Is A' Chrìon Làraich 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.
Do you work for landlords with property near Crianlarich station?
Yes, rental work is part of what we do. You can email us at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before we start.
How long does external mastic take?
It depends on the size of the job, but as a guide it takes a few hours to a few days, depending on the length of joint and the access. We’ll give you a better idea when we quote.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding so the bead can stretch.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. It normally takes a few hours for a handful of joints, longer for a whole elevation. In smaller Scottish places, parking is generally 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.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
- Let us know about parking restrictions
Getting a quote
Need a quote? Please send an email to info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and send you a clear quote before we start.
Read more
Surface by surface
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible in all weathers.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
What happens if it’s left?
Resealing a run of joints in one go is usually better than patching one at a time. Joints of the same age tend to fail together and it means sorting access once. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
Why choose Mr Mastic in A' Chrìon Làraich
- Sanitary silicone with an anti-fungal additive in wet areas
- A sealant colour to suit the surroundings
- More than 20 years in sealant work
- A 12-month guarantee on all work
Read how sealant jobs are priced and customer reviews.
What sealant work can’t fix
It helps to know what we cannot do:
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Brickwork movement joints
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
Places near A' Chrìon Làraich
More services for A' Chrìon Làraich
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Quotes for external mastic in A' Chrìon Làraich
For a quick quote, just ask. What matters most is:
- The size of the job
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- Roughly how big the job is
- Whether it’s a home or a business
- Any access issues, like height or stairs
For 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.
Looking after it afterwards
So the new joints stay in good condition:
- Walk round the building once a year and look at the joints
- Avoid pressure-washing directly into sealant joints
- Don’t let climbing plants root in the sealant
- Show decorators and builders where the movement joints are
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.