Na h-Eileanan Siar · Scotland
External & façade joints in Lochboisdale, Na h-Eileanan Siar
External mastic in Lochboisdale from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Weeds or debris growing in open joints
- Failed seals between different materials
- Joints with sealant missing in places
External mastic in Lochboisdale
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We work on joints between brick and frames, façade panels and brickwork movement joints, and people most often call us about weathered mastic that no longer stretches and panel joints letting water in.
Outside joints can only be sealed when they’re dry, so work in Lochboisdale depends on the weather. Tell us how to reach each wall, gutter and roofline.
We stand behind the work with a one-year guarantee, so you are covered after we have gone.
- Location
- Lochboisdale (HS8)
- Wider area
- Na h-Eileanan Siar
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so the movement is taken up.
What we cannot put right
In fairness, there are a few things sealant won’t fix:
- Subsidence or other structural problems
- Loose or hollow render, which needs re-rendering
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think.
Where we work in Lochboisdale
- Façade panels
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
Walls and rooflines in Lochboisdale
Lochboisdale 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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Whether the job is in Lochboisdale itself or nearby, the right material for each joint matters as much as a neat finish.
Lochboisdale is in Na h-Eileanan Siar. Whether you are in the middle of Lochboisdale or further out, we cover external mastic for every kind of property. Our Na h-Eileanan Siar coverage runs to 87 places, and Lochboisdale is one of them.
Here we cover the HS8 postcode area for external mastic. We cover properties on Braehead, Calabhaigh and Kenneth Terrace. If you’re just outside Lochboisdale, we cover Loch Baghasdail (1 mile north), Dalabrog (2 miles north-west), Rubha Ban (5 miles south), Eòlaigearraidh (9 miles south-west) and Cuidhir (12 miles south-west). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Around Lochboisdale
Well-known places in the area include Calvay Castle (1.8 miles east). The countryside around Lochboisdale includes Beinn Ruigh Choinnich and Loch Stulaval.
Why deal with it now?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. 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.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Neat joints and a tidy finish
- Arbo and Everbuild products
- A sealant colour to suit the surroundings
Take a look at how sealant jobs are priced and our reviews.
Quotes for external mastic in Lochboisdale
We quote each job individually. These are the things that affect it:
- The size of the job
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- A few pictures by email, if you can
- Whether it’s a home or a business
- How we’d reach the joints
We do not publish a price list. Instead, your job gets its own clear quote. To get started, send an email to info@mrmastic.co.uk.
Questions from Lochboisdale
Is Lochboisdale in your area for external mastic?
Yes. We work across all of Scotland, and Lochboisdale is part of that. You can email us at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear quote.
Is external mastic in a coastal place like Lochboisdale any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Do you guarantee your work?
Yes. Each job is guaranteed for twelve months, large or small.
Which products 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 will explain our choice.
What does external mastic cost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before we start.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose. A flexible sealant is the right fill.
Do you have insurance?
Yes. We are fully insured, and we can confirm the details when we quote.
Towns and villages near Lochboisdale
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The process
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. For a place like Lochboisdale, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
How to get a quote
If you are in Lochboisdale and need external mastic, drop us a line at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
Do you need external mastic in Lochboisdale?
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Any of these means the joints need attention:
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
- Cracked joints where brick meets render or frames
In and around Lochboisdale, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- Is VAT in the price?
- How much experience the applicator has
- Which colour the sealant will be
- What guarantee comes with the work
Landlords, agents and businesses in Lochboisdale
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
For anyone letting property in or around Lochboisdale, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.