Highland · Scotland
External Mastic in Portskerra
External mastic in Portskerra from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant pulling away from one side of the joint
- Failed sealant between panels on a façade
- Cracked joints where brick meets render or frames
What the job involves on each surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and protects the render itself.
External mastic in Portskerra, done properly
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. We work on copings & trims, façade panels and brickwork movement joints, and people most often call us about plants rooting in failed movement joints and movement joints filled with mortar instead of sealant.
Outside joints can only be sealed when they’re dry, so work in Portskerra depends on the weather. Tell us how to reach each wall, gutter and roofline.
The work is covered for a year after we finish. If anything is not right with it, drop us a line at info@mrmastic.co.uk.
- Place
- Portskerra (KW14)
- Region
- Highland
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What else we do in Portskerra
Portskerra: your questions answered
Do you cover smaller places like Portskerra?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Does the coastal weather in Portskerra affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Do you work for landlords and businesses?
Yes, regularly. We can quote for several properties at once.
Will the new joint stand out?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
Are you insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Can you reach joints on upper floors?
It depends on the building. Tell us the height, the number of joints and what’s below them and we’ll confirm how they can be reached safely.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Walls and rooflines in Portskerra
Portskerra is close to 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. 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 Portskerra itself or nearby, the right material for each joint matters as much as a neat finish. Around Portskerra, as everywhere, external mastic is only as good as the preparation behind it.
Portskerra is about 15 miles west of Thurso, in Highland. Wherever you are in the KW14 postcode area, we can carry out external mastic at your property. Our area takes in 253 places across Highland, large and small.
Jobs for external mastic in KW14 works the same way as everywhere else we cover. If you need external mastic at a property on Bayview Avenue, Mackay Terrace and Shore Street or a nearby road, our applicators can take on the job. If you’re just outside Portskerra, we cover Melvich (1 mile south-east), Strathy (3 miles west), Reay (5 miles east), Am Blàran Odhar (11 miles west) and Forss (11 miles east). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Local landmarks in Portskerra
For a walk, there’s Loch Sgiathanach.
Quotes for external mastic in Portskerra
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- Access and height
- The type of sealant required
- Working hours on commercial sites
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
- Pictures of the joints, sent by email
To get a quote, email us at info@mrmastic.co.uk with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours for a handful of joints, longer for a whole elevation. Outside jobs in Portskerra need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us if parking is tricky
- Move anything stored near the joints
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Read more
What we cannot put right
Sealant isn’t the answer to every problem, and we will tell you before work begins. Sealant won’t put right:
- Walls that need new movement joints cut into them
- Cracks in the bricks or render themselves, away from the joints
- Rising or penetrating damp from elsewhere in the wall
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think.
Surfaces we seal
- Façade panels
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
Leave it or put it right?
Water gets in through a failed movement joint, behind render and cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. 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.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- 4.9 on Google from 180+ five-star reviews
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
- Sanitary silicone with an anti-fungal additive in wet areas
Read our cost guide or our reviews.
Aftercare tips
A little care helps the new joints last. We recommend:
- Do not let climbing plants root in the sealant
- Deal with leaking gutters that soak the joints below
- Walk round the building once a year and look at the joints
- Check the sealant is paintable before painting near it
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.