Na h-Eileanan Siar · Scotland
External & façade joints in Na Gearrannan, Na h-Eileanan Siar
Sealing brickwork movement joints, render, cladding and façade joints for Na Gearrannan, backed by a one-year guarantee. Call for a quick quote.
- Old sealant gone brittle and cracked
- Panel joints letting water in
- Rigid filler in a joint that should flex
How we handle external mastic in Na Gearrannan
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. We work on façade panels, brickwork movement joints and copings & trims, and the jobs we see most are old sealant gone brittle and cracked and plants rooting in failed movement joints.
External sealant needs dry surfaces, so outdoor work around Na Gearrannan is planned around the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
Your job is guaranteed for a year, as with all our work.
- Place
- Na Gearrannan (HS2)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Signs you need external mastic in Na Gearrannan
If plants are growing out of a joint, the sealant has generally failed or was never there. Dirt and roots then trap moisture in the joint.
If you can see any of these, it’s time to have the joints looked at:
- Water getting into walls through failed joints
- Brick movement joints where the sealant has split
- Old sealant gone brittle and cracked
- Moss and dirt in joints with no sealant left
In and around Na Gearrannan, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Questions to ask before booking
- Is the old sealant removed completely?
- What guarantee comes with the work
- When the joint can take water or movement
- Which sealant they’ll use, and why
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Landlords, agents and businesses in Na Gearrannan
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
If you manage several properties in or around Na Gearrannan, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Na Gearrannan questions
Is Na Gearrannan in your area for external mastic?
Yes, Na Gearrannan is within the area we cover. We work across all of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job, and we’ll send you a clear quote.
Does living near the coast affect external mastic in Na Gearrannan?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are generally the first to need attention.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Na Gearrannan.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
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 doesn’t stand out.
Outside joints around Na Gearrannan
Na Gearrannan 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. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
Whether the job is in Na Gearrannan itself or nearby, the right material for each joint matters as much as a neat finish.
Na Gearrannan (Gaelic: Garenin) is in Na h-Eileanan Siar. Homes, rented property, offices and hotels in Na Gearrannan can book us for external mastic. The work is guaranteed for a year. We cover 87 towns and villages across Na h-Eileanan Siar, from the larger towns to small villages.
Every address in HS2 is within our area for external mastic. Close by, we work in Carloway (1 mile south-east), Shawbost (4 miles north-east), Breasclete (5 miles south), Bragar (6 miles north-east) and Barabhas (10 miles north-east). If you’re somewhere remote, the job takes a little more planning.
Near you in Na Gearrannan
Other landmarks nearby include Gearannon Blackhouse Village (within half a mile north-west). Green spaces nearby include Loch Langavat.
Aftercare tips
A little care helps the new joints last. Our advice:
- Make sure movement joints aren’t pointed over
- Ask before painting over external sealant
- Avoid pressure-washing directly into sealant joints
- Deal with leaking gutters that soak the joints below
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
How it works
We keep the work tidy and contained to the area we are working on. The job usually takes anything from a few hours to several days, depending on the building. Somewhere like Na Gearrannan may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we are working on
- On commercial sites, let us know about site rules
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
What affects the quote in Na Gearrannan
We quote each job individually. These are the things that affect it:
- How many areas need sealing
- The type of sealant required
- When we can work, for business premises
- How easy the joints are to reach
What you pay reflects the work, not a rough estimate. That is why we ask about the job first.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- Photos by email, if that’s easy
- If someone has resealed it before
Want a quote for external mastic? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
Why act early in Na Gearrannan
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why choose Mr Mastic in Na Gearrannan
- A sealant colour to suit the surroundings
- You choose the colour before work begins
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas