Na h-Eileanan Siar · Scotland
Port Mholair External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Port Mholair. Fully insured, ARBOMaster approved and guaranteed for a year.
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Movement joints filled with mortar instead of sealant
External mastic for homes and businesses in Port Mholair
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two. If you’re dealing with movement joints filled with mortar instead of sealant and sealant pulling away from one side of the joint, we can help.
External sealant needs dry surfaces, so outdoor work around Port Mholair 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.
- Location
- Port Mholair (HS2)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water behind a failed seal does the most damage when nobody’s watching.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Port Mholair
- White, clear, grey or coloured to suit, where the product allows
- More than 20 years in sealant work
- Colour agreed with you before any work starts
- Quality sealants from Arbo and Everbuild
Read how sealant jobs are priced and customer reviews.
Quotes for external mastic in Port Mholair
There’s no set price list, because no two jobs are the same. What we look at:
- The amount of work
- Whether there’s mould to deal with
- Which sealant suits the joint
- How many areas need sealing
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- What’s wrong with the joints now
- Roughly how big the job is
- Whether it has been sealed before
- The address or postcode of the job
Need a quote? Please drop us a line at info@mrmastic.co.uk with a few details. We’ll explain what we’d do and give you a clear quote before we start.
How the job changes by surface
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible year round.
Towns and villages near Port Mholair
What else we do in Port Mholair
How it works
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes anything from a few hours to several days, depending on the building for a typical job. For a place like Port Mholair, longer drives are planned in advance. 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.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
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, and add photos by email if you can.
Related advice
Questions from Port Mholair
Is Port Mholair in your area for external mastic?
Yes. Our work covers the whole of Scotland, and Port Mholair is part of that. You can email us at info@mrmastic.co.uk and tell us what needs doing.
Do you cover smaller places like Port Mholair?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland, including the islands, where work is planned around ferry crossings. Let us know about access, parking and anything unusual about getting there when you book.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then send an email to info@mrmastic.co.uk.
What is backing rod for?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses, and we’re fully insured.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Is the work guaranteed?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
How long should I leave it?
Cure times vary by product. We tell you how long to leave it before we go.
External mastic in Port Mholair: local notes
Port Mholair is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Island weather, with its wind and salt spray, is tough on movement joints and outside wall joints.
Around Port Mholair, as everywhere, external mastic is only as good as the preparation behind it. Managing a site like Aird Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Port Mholair (Gaelic: Portvoller) is in Na h-Eileanan Siar. From the centre of Port Mholair to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Port Mholair is one of 87 towns and villages in Na h-Eileanan Siar we cover for external mastic.
Here we cover the HS2 postcode area for external mastic. Other places close to Port Mholair include Portvoller (1 mile south-west), Aird (1 mile south-west), Shulishader (2 miles south-west), Sulaisiadar (3 miles south-west) and Garrabost (4 miles south-west). If you’re somewhere remote, the job takes a little more planning.
Near you in Port Mholair
Not far away are Loch an Tiumpan.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
How to look after the new joints
To keep the joints looking good and working properly:
- Deal with leaking gutters that soak the joints below
- Check external joints each spring
- Make sure movement joints are not pointed over
- Tell anyone working on the walls about the movement joints
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.