Dundee · Scotland
External & façade joints in Blackness, Dundee
Professional external mastic in and around Blackness, with every bit of old sealant taken out first and a 12-month guarantee.
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
About our external mastic in Blackness
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it, and we don’t skip that step. We work on concrete & block, render & cladding joints and façade panels, and people most often call us about plants rooting in failed movement joints and failed sealant between panels on a façade.
Scotland’s cities also have plenty of modern blocks with rendered or clad walls and sealed movement joints. Around Blackness, as anywhere, those joints dry out and crack over time, letting water behind the face of the building.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Blackness (DD1, DD2, DD3)
- Region
- Dundee
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Quotes for external mastic in Blackness
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- Whether the work is at height
- The type of sealant required
- The number of rooms or windows
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- How we’d reach the joints
- If someone has resealed it before
- The type of property
- The rough size of the job
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
What happens on the day
At the end, we look at the finished work together. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. In a city area like Blackness, parking may be by permit or pay-and-display, so tell us what’s nearby. If you are in a flat, let us know how we get in at the street door.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- 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.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
Advice
When something else is needed
Before booking, it’s worth knowing the limits:
- Damp that is not coming from the joint
- Adding movement joints to masonry that has none
- Movement that is more than a sealant joint can take
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Concrete & block
Different surfaces, different methods
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly where it can be done safely.
Outside joints around Blackness
Blackness 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. Dundee’s older tenements are sandstone, and the city sits on the Firth of Tay.
If you let a flat or house near Dundee station, split movement joints are easy to miss on a rental until damp shows inside. Schools such as Dundee School of Architecture are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Blackness is about 1 mile south-west of Dundee, in Dundee. We provide external mastic to homes and businesses in Blackness and nearby, as part of our work across Dundee. Our Dundee coverage runs to 50 places, and Blackness is one of them.
Work in DD1, DD2 and DD3 is quoted and booked the same way as anywhere else. If you need external mastic at a property on City Road, Tait's Lane and Lochee Road or a nearby road, we can help. Nearby, we also carry out external mastic in West End (1 mile south), Dundee (1 mile north-east), Stobswell (1 mile north-east), Woodside (2 miles north-east) and Downfield (2 miles north). Further out, we also cover Broughty Ferry (5 miles east), Monifieth (7 miles east), Barnhill (5 miles east), Pitkerro (3 miles north-east), Whitfield (3 miles north-east) and Balgowan (3 miles north). Blackness is one of the larger places we cover in Dundee.
Around Blackness
Locally, jobs take us to homes and businesses close to Cox Branch Library, Dudhope Park and Harris Academy and the streets around them. For rail, the closest station is Dundee station, about 0.9 miles east. Nearby you will also find Dundee Dental Hospital (0.6 miles east) and Tayside Medical History Museum (under half a mile north-east). Not far away are Balgay Hill and Trottick Mill Ponds.
Other services in Blackness
Blackness: your questions answered
Do you work for landlords with property near Dundee station?
Yes, we work for landlords and agents. You can email us at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before we start.
How do repairs to the shared parts of a tenement in Blackness get organised?
It normally goes through the owners together, or through the factor if the building has one. The Tenements (Scotland) Act 2004 covers the common parts where the deeds do not.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Can you reach joints on upper floors?
That depends on the building and the joints. Where joints can be reached safely, we will do them. Tell us about the building and we will confirm what access is needed.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Do you cover Blackness?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, Blackness included.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Blackness and across Dundee. Several sites can go on one quote, and we are fully insured.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What we are called out for in Blackness
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.
Look out for any of the following:
- Joints with sealant missing in places
- Weeds or debris growing in open joints
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
Camperdown House, about 2.5 miles north-west, is one of the historic houses in the wider area around Blackness, and older homes nearby need a sealant that suits their walls.
What your quote should include
- How the colour is chosen
- Whether they’re fully insured
- What the quote includes, VAT included or not
- What happens if they find a problem under the old sealant
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Look over the joints every year, ideally after winter
- Keep water from gutters off the wall
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.