Shetland Islands · Scotland
External & façade joints in Exnaboe, Shetland Islands
Sealing brickwork movement joints, render, cladding and façade joints for Exnaboe, backed by a 12-month guarantee. Ask us for a quote.
- Hard, crazed mastic that has stopped moving
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
How we handle external mastic in Exnaboe
On houses, flats and commercial buildings across Exnaboe, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We’re often asked to deal with hard, crazed mastic that has stopped moving and movement joints with cracked, split or missing sealant, across render & cladding joints, copings & trims and joints between brick and frames.
In and around a place like Exnaboe, many buildings face open ground and take the full weather. Outside joints on exposed walls work hard, so they need a sealant that moves with the building.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Exnaboe (ZE3)
- Region
- Shetland Islands
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Leave it or put it right?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. 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 damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Why Exnaboe clients choose us
- Domestic, commercial and hotel work
- White, clear, grey or coloured to suit, where the product allows
- Quality sealants from Arbo and Everbuild
- 20+ years of sealant experience
See what affects the cost and our reviews.
DIY sealant or a professional job?
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.
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.
When something else is needed
Sealant isn’t the answer to every problem, and we will tell you before we start. Sealant won’t put right:
- Movement that’s more than a sealant joint can take
- Adding movement joints to masonry that has none
- 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.
Joints and surfaces we work on
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Copings & trims
- Brickwork movement joints
How the visit works
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. For a place like Exnaboe, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
Get a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand.
Related advice
Towns and villages near Exnaboe
Other services in Exnaboe
Elsewhere in the Shetland Islands
External Mastic in all 63 places in the Shetland Islands
Our services in the Shetland Islands
All areas
About external & façade joints
What external mastic looks like in Exnaboe
Exnaboe 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’s hard on movement joints and outside wall joints, especially on the side facing the sea. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
In and around Exnaboe, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Exnaboe is about 19 miles south of Lerwick, in the Shetland Islands. Wherever you are in the ZE3 postcode area, our applicators can take on external mastic. 63 places in the Shetland Islands are on our list, large and small.
Jobs for external mastic in ZE3 works the same way as everywhere else we cover. Neighbouring places we cover for external mastic include Toab (1 mile west), Hestingott (1 mile west), Scatness (1 mile south), Boddam (2 miles north) and South Scousburgh (3 miles north). For island and remote addresses, a little more planning is needed, so mention it when you ask for a quote.
Around Exnaboe
Well-known places in the area include Shetland Crofthouse Museum (1.6 miles north). Not far away are Loch of Huesbreck and Sumburgh Head RSPB reserve.
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Never let anyone fill a movement joint with mortar
- Fix overflowing gutters above sealed joints
- Ask before painting over external sealant
- Avoid pressure-washing directly into sealant joints
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- Any mould that needs treating
- Whether the work is at height
- How much there is to do
- When we can work, for business premises
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Asking for a quote
Before you ask for a quote, have a think about:
- How we’d reach the joints
- Where the property is
- Whether it has been sealed before
- A few pictures by email, if you can
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, drop us a line at info@mrmastic.co.uk.
Common problems we fix in Exnaboe
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
It’s worth asking for a quote if you see:
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
- Plants rooting in failed movement joints
For jobs in and around Exnaboe, choosing the right material for each joint is as important as a tidy finish.
What to look for in a quote
- Which colour the sealant will be
- What the cure time is
- The length of the guarantee
- Is VAT in the price?
FAQs for Exnaboe
Is Exnaboe in your area for external mastic?
Yes, Exnaboe is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Does the coastal weather in Exnaboe affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces, primed where needed.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, wherever you are.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.