Dundee · Scotland
External Mastic in Barnhill
Problem with your movement joints in Barnhill? We remove the old material, prepare the joints and seal them properly.
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
- Movement joints filled with mortar instead of sealant
About our external mastic in Barnhill
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where mortar or filler would crack. If you’re dealing with plants rooting in failed movement joints and sealant pulling away from one side of the joint, we can put it right, whatever the surface.
Stone-built tenements in Scotland’s cities share their roof, gutters and outside walls between every flat in the building. In Barnhill, work on shared parts of a tenement is usually agreed between owners, often with a factor arranging it.
The work is covered for a year after we finish. If there’s a problem with it, please drop us a line at info@mrmastic.co.uk.
- Where
- Barnhill (DD5)
- Region
- Dundee
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Signs you need external mastic in Barnhill
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
The most common problems we see are:
- Rigid filler in a joint that should flex
- Gaps where render, brick and frames meet
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
For landlords with property near Balmossie station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- The length of the guarantee
- Which sealant they’ll use, and why
- What insurance they hold
- How long to leave it before use
Honest limits
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Cracks in the bricks or render themselves, away from the joints
- Render that’s blown, hollow or coming away
- Movement that’s more than a sealant joint can take
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think before you book.
What we seal
- Brickwork movement joints
- Façade panels
- Copings & trims
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
The process
At the end, we look at the finished work together. The work normally takes anything from a few hours to several days, depending on the building, depending on the amount of work. In a city area like Barnhill, parking may be by permit or pay-and-display, so tell us what’s nearby. For flats, mention the door entry system and any shared-stair arrangements.
- 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.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
Get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
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Quotes for external mastic in Barnhill
The quote reflects the job in front of us. We look at:
- Whether old sealant or filler has to be cut out
- The product the joint needs
- Working hours on commercial sites
- Mould in or behind the old joints
Commercial jobs are quoted on the same basis as homes: how much there is to do, 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.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- How we’d reach the joints
- Pictures of the joints, sent by email
We don’t publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, drop us a line at info@mrmastic.co.uk.
Walls and rooflines in Barnhill
Barnhill is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
In the older streets around St Margaret's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Monifieth High School? Then larger buildings have long runs of movement joint that eventually need resealing.
Barnhill is about 5 miles east of Dundee, in Dundee. Jobs in Barnhill get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 50 places across Dundee.
Jobs for external mastic in DD5 is quoted and booked the same way as anywhere else. Streets in the area include Fyne Road, Holly Road and Reres Road, and we cover them all. Close by, we work in Broughty Ferry (1 mile west), Monifieth (1 mile north-east), Douglas (2 miles west), Tayport (2 miles south-west) and Ballumbie (2 miles north-west). Larger places within reach include Dundee (5 miles west), Stobswell (4 miles west), Blackness (5 miles west), Logie (6 miles west), St Marys (6 miles west) and Downfield (5 miles west). Barnhill is one of the larger places we cover in Dundee.
Landmarks near Barnhill
Locally, jobs take us to homes and businesses close to Jolly's Hotel and Grange Primary School. The nearest railway station is Balmossie station, about 0.7 miles east. Nearby you will also find Broughty Castle (1 mile south-west) and James Guthrie Orchar Art Gallery (1 mile south-west). Open spaces near Barnhill include Trottick Mill Ponds.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Keep high-pressure jets off the joints
- Check the sealant is paintable before painting near it
- Do not let climbing plants root in the sealant
- Get split or bare joints resealed while the damage is small
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges over time.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Places near Barnhill
More services for Barnhill
Barnhill: your questions answered
Does living near the coast affect external mastic in Barnhill?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are usually the first to need attention.
How do repairs to the shared parts of a tenement in Barnhill get organised?
The owners of the flats generally agree repairs to shared parts like the roof and outside walls, and many buildings have a factor to arrange it. The Tenements (Scotland) Act 2004 sets out how that works where the title deeds do not. Your title deeds will say who owns the windows.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you work for letting agents?
Yes. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
For landlords and businesses
We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.