Na h-Eileanan Siar · Scotland
External & façade joints in Cliasmol, Na h-Eileanan Siar
External mastic in Cliasmol from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rain getting behind render or cladding at a joint
- Rigid filler in a joint that should flex
- Sealant that has lost its bond to the brick or render
How we handle external mastic in Cliasmol
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 in a matching colour. If you are dealing with plants rooting in failed movement joints and cracked joints where brick meets render or frames, we can put it right, whatever the surface.
In and around a place like Cliasmol, many buildings face open ground and take the full weather. Outside joints on exposed walls work hard.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Cliasmol (HS3)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What we are called out for in Cliasmol
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
People normally contact us when they notice something like this:
- Moss and dirt in joints with no sealant left
- Leaking joints around cladding and façade panels
- Failed seals between different materials
- Joints pointed up with cement by mistake
In and around Cliasmol, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- What product goes in the joint
- How hidden problems are handled
- Whether you can choose the colour
- What the cure time is
Also near Cliasmol
What else we do in Cliasmol
How it works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours to a few days, depending on the length of joint and the access, including the tidy-up. Somewhere like Cliasmol may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Clear the area around the work
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Advice
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- Any mould that needs treating
- The amount of work
- When we can work, for business premises
- The old material and how stubborn it is
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
Asking for a quote
When you contact us, it’s useful to know:
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
- What’s wrong with the joints now
- If someone has resealed it before
We don’t publish a price list. Instead, we give you a clear price for your job. To get started, email us at info@mrmastic.co.uk.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Leave it or put it right?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. In an older home around Cliasmol, damp from a failed joint can get into timber and plaster.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why Cliasmol clients choose us
- A sealant colour to suit the surroundings
- We’re fully insured
- Homes, businesses and hotels
- A choice of colours where the product allows
How the job changes by surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Outside joints around Cliasmol
Cliasmol is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Cliasmol is in the west of Scotland, which is wetter than the east, which means movement joints and outside wall joints has to cope with a lot of rain.
For jobs in and around Cliasmol, choosing the right material for each joint is as important as a tidy finish.
Cliasmol is in Na h-Eileanan Siar. Every kind of property in Cliasmol can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. We cover 87 towns and villages across Na h-Eileanan Siar.
Here we cover the HS3 postcode area for external mastic. Close by, we work in Tarbert (7 miles south-east), Direcleit (7 miles south-east), Miabhaig (8 miles south-east), Drinisiadar (10 miles south-east) and Greosabhagh (10 miles south-east). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Landmarks near Cliasmol
For a walk, there’s Ben Luskentyre and Loch Scourst.
Questions from Cliasmol
Will you come out to Cliasmol?
Yes, we do. We work across all of Scotland, islands included, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you cover Cliasmol for external mastic?
Yes. Our work covers the whole of Scotland, and Cliasmol is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that generally means someone at home.
Will the new joint stand out?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We pick the one that suits your wall best so it does not stand out.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
What we can’t put right
New sealant can’t fix everything, and we’ll tell you before we start. Sealant will not put right:
- Cracked brickwork or render that needs a builder or plasterer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Render that is blown, hollow or coming away
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think.
Where we work in Cliasmol
- Copings & trims
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Façade panels
- Brickwork movement joints