Na h-Eileanan Siar · Scotland
External Mastic in Clachan Shannda
Specialist external mastic for Clachan Shannda: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
What happens on the day
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. For a place like Clachan Shannda, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention if the joints have been sealed before
- Move anything stored near the joints
- Tell us if parking is tricky
Get a quote
For external mastic in Clachan Shannda, 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.
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How we handle external mastic in Clachan Shannda
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where a rigid filler would soon crack. Typical jobs include joints where the bead has come unstuck and hard, crazed mastic that has stopped moving, on façade panels, copings & trims and concrete & block.
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 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.
- Place
- Clachan Shannda (HS6)
- Region
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Places near Clachan Shannda
Also in Clachan Shannda
Leave it or put it right?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. Around Clachan Shannda, water from a failed joint in an older stone home can soak into timber and plaster.
Combining jobs into one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Why Clachan Shannda customers choose us
- Fully insured
- Experience in homes, commercial sites and hotels
- A choice of colours where the product allows
- Every job guaranteed for a year
Quotes for external mastic in Clachan Shannda
There’s no set price list, because jobs vary so much. What we look at:
- Access and height
- How many areas need sealing
- How much there is to do
- The type of sealant required
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- A few photos by email, if you can
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
Need a quote? Please email us at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Common problems we fix in Clachan Shannda
Some movement joints have been pointed up with mortar. The joint cannot move, so the wall cracks somewhere else instead.
Most people get in touch after spotting something like this:
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
- Rigid filler in a joint that should flex
Whether the job is in Clachan Shannda itself or nearby, the right material for each joint matters as much as a neat finish.
Questions to ask before booking
- Whether VAT is included
- How long to leave it before use
- What preparation is included
- What guarantee comes with the work
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Work for landlords, hotels and businesses
If you manage several properties in or around Clachan Shannda, several properties can be quoted together. Just tell us the addresses and what each one needs.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Your questions about external mastic in Clachan Shannda
Can you do external mastic in Clachan Shannda?
Yes, Clachan Shannda is within the area we cover. We work across all of Scotland. You can email us at info@mrmastic.co.uk and tell us what needs doing.
Do you cover smaller places like Clachan Shannda?
Yes, Clachan Shannda is covered. We work across all of Scotland, islands included, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
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.
Can tenants book the work?
Yes. Check with your landlord; we can send the quote to them too.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Different surfaces, different methods
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant is not too deep.
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Walls and rooflines in Clachan Shannda
Clachan Shannda is within about 1 mile of 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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
In and around Clachan Shannda, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Clachan Shannda (Gaelic: Clachan Sands) is in Na h-Eileanan Siar. Clachan Shannda gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 87 places across Na h-Eileanan Siar.
Here we cover the HS6 postcode area for external mastic. You’ll find Clachan Shannda on the B893, which makes it straightforward to reach. If you are just outside Clachan Shannda, we cover Ruisgarry (4 miles north-east), Lochmaddy (5 miles south-east), Locheport (8 miles south), Claddach Kyles (9 miles south-west) and Claddach Kirkibost (9 miles south-west). If you’re somewhere remote, a little more planning is needed.
Local landmarks in Clachan Shannda
The countryside around Clachan Shannda includes Loch nan Gobhar and Borve Hill.