Aberdeenshire · Scotland
External & façade joints in Johnshaven, Aberdeenshire
External mastic in Johnshaven from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Moss and dirt in joints with no sealant left
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
Surface by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one before the bead.
External mastic in Johnshaven
Low-level joints can generally be done from the ground. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. We work on brickwork movement joints, concrete & block and render & cladding joints, and people most often call us about failed seals between different materials and leaking joints around cladding and façade panels.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. On newer homes, the movement joints and roofline trims are what need watching.
Whatever the size of the job, it’s backed by our one-year guarantee in Johnshaven and across Aberdeenshire.
- Place
- Johnshaven (DD10)
- Wider area
- Aberdeenshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Do you need external mastic in Johnshaven?
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
It’s worth asking for a quote if you see:
- Sealant pulling away from one side of the joint
- Panel joints letting water in
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
For jobs in and around Johnshaven, choosing the right material for each joint is as important as a tidy finish.
What your quote should include
- How the colour is chosen
- How long to leave it before use
- What product goes in the joint
- What preparation is included
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Johnshaven buildings and the weather
Johnshaven is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Around Johnshaven, as everywhere, external mastic is only as good as the preparation behind it.
Johnshaven is about 8 miles north-east of Montrose, in Aberdeenshire. We provide external mastic to householders, landlords and businesses in Johnshaven and nearby, as part of our work across Aberdeenshire. Across Aberdeenshire, we cover 161 places, and Johnshaven is one of them. We also work in Aberdeen, around 26 miles away.
Jobs for external mastic in DD10 is quoted and booked the same way as anywhere else. That includes homes and businesses on Square, Main Street and Mid Street and the roads around them. If you’re just outside Johnshaven, we cover Gourdon (3 miles north-east), St Cyrus (3 miles south-west), Inverbervie (4 miles north-east), Arbuthnott (5 miles north) and Laurencekirk (6 miles north-west). Within a short drive, we also cover Montrose (8 miles south-west), Stonehaven (13 miles north), Hillside (6 miles south-west) and Ferryden (8 miles south-west).
Near you in Johnshaven
Nearby you will also find Benholm Castle (2.1 miles north). The countryside around Johnshaven includes St Cyrus National Nature Reserve.
How it works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours to a few days, depending on the length of joint and the access. Outside jobs in Johnshaven need a dry day, because sealant won’t bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Tell us about any water getting in
- On commercial sites, let us know about site rules
- Clear items away from the joints we are working on
Ask for a quote
Want a quote for external mastic? Please drop us a line at info@mrmastic.co.uk with a few details. We will explain what we’d do and give you a clear price before any work starts.
Read more
Nearby places to Johnshaven
Other services in Johnshaven
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Point out the joints to other trades
- Keep high-pressure jets off the joints
- Deal with leaking gutters that soak the joints below
- Act on the first splits you see
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Your questions about external mastic in Johnshaven
Does living near the coast affect external mastic in Johnshaven?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is Johnshaven within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Quotes for external mastic in Johnshaven
Every job gets its own quote. These are the things that affect it:
- The product the joint needs
- Working hours on commercial sites
- Whether there’s mould to deal with
- Access and height
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, drop us a line at info@mrmastic.co.uk and we will give you an honest view and a quote.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- Any previous sealing or DIY work
- The problem you’ve noticed
- How we’d reach the joints
- How many joints, rooms or windows are involved
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.