Argyll and Bute · Scotland
External Mastic in Stronmilchan
Professional external mastic in and around Stronmilchan, with every bit of old sealant taken out first and a 12-month guarantee.
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
- Failed seals between different materials
External mastic in Stronmilchan, done properly
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. We are often asked to deal with rain getting behind render or cladding at a joint and cracked joints where brick meets render or frames, across concrete & block, façade panels and brickwork movement joints.
Outside joints can only be sealed when they’re dry, so work in Stronmilchan depends on the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Stronmilchan (PA33)
- Region
- Argyll and Bute
- Cover
- One year on every job
- Quotes
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Surface by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
DIY sealant or a professional job?
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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. 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.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
What you get with us
- Old sealant always removed completely
- More than 20 years in sealant work
- Arbo and Everbuild products
- Colour picked to suit the job
FAQs for Stronmilchan
Do you work for landlords with property near Dalmally station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just email us at info@mrmastic.co.uk with the address and what needs doing, and we will give you a clear quote.
Can you do external mastic in Stronmilchan?
Yes, Stronmilchan is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Will the new joint stand out?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
How long before the joint can be used?
It depends on the product. We tell you how long to leave it before we go.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and reseal when it splits.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee.
Why do you put foam in the joint first?
That’s backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly before booking.
What we seal
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Façade panels
- Concrete & block
What external mastic looks like in Stronmilchan
Harled (roughcast) walls are common in Scotland, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface. Stronmilchan is in the west of Scotland, which is wetter than the east, so there’s plenty of rain for movement joints and outside wall joints to keep out.
In the older streets around Glenorchy Parish Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Dalmally station, outside joints that have cracked can let damp into a rental, so check them between lets.
Stronmilchan is about 30 miles north of Helensburgh, in Argyll and Bute. Whether you are in the middle of Stronmilchan or further out, external mastic is available for homes and businesses alike. Stronmilchan is one of 118 places in Argyll and Bute we cover for external mastic. For nearby work, see our Glasgow page.
Every address in PA33 is within our area for external mastic. With the B8077 close by, Stronmilchan is simple for us to get to. We also cover the places around Stronmilchan: Lochawe (1 mile west), Dalmally (2 miles south-east), Ardbrecknish (7 miles south-west), Taynuilt (9 miles west) and Clachan (10 miles south). Remote and island addresses need a little more planning, so please mention your location when you drop us a line at info@mrmastic.co.uk.
Landmarks near Stronmilchan
Stronmilchan’s nearest station is Dalmally station, about 0.9 miles south-east of the centre.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Housing providers, facilities teams and property managers book us too in Stronmilchan and across Argyll and Bute. We can quote a run of properties together, and we’re fully insured for the work.
What happens on the day
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. Around Stronmilchan, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- 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.
Preparing for the visit
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
Get a quote
If you are in Stronmilchan and need external mastic, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Read more
Places near Stronmilchan
What else we do in Stronmilchan
What affects the cost of external mastic
Every job gets its own quote. This is what makes a difference:
- How easy the joints are to reach
- Any mould that needs treating
- How many areas need sealing
- Any working-time requirements on site
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Asking for a quote
To help us quote quickly, let us know:
- The problem you’ve noticed
- Whether it’s a home or a business
- If someone has resealed it before
- Roughly how big the job is
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work before giving you a price.