Aberdeen · Scotland
External & façade joints in Cornhill, Aberdeen
We cover Cornhill for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Plants rooting in failed movement joints
External mastic for homes and businesses in Cornhill
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. We are often asked to deal with movement joints filled with mortar instead of sealant and sealant pulling away from one side of the joint, on joints between brick and frames, façade panels and brickwork movement joints.
Scotland’s cities also have plenty of modern blocks with rendered or clad walls and sealed movement joints. In Cornhill, those joints dry out over time and let water in behind the render or cladding.
All our work comes with a 12-month guarantee, wherever you are in Aberdeen.
- Where
- Cornhill (AB16, AB25, AB24)
- Region
- Aberdeen
- Cover
- A year, on every job
- Quote
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Fix overflowing gutters above sealed joints
- Do not let climbing plants root in the sealant
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
Towns and villages near Cornhill
Also in Cornhill
How the job changes by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Common questions in Cornhill
How do repairs to the shared parts of a tenement in Cornhill 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.
Is external mastic in a coastal place like Cornhill any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
How long will you be here?
Most jobs take a few hours to a few days, depending on the length of joint and the access, including the preparation. We’ll confirm how long when we quote.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
When it isn’t the sealant
New sealant can’t fix everything, and we will tell you before we start. It won’t solve:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that isn’t coming from the joint
- Adding movement joints to masonry that has none
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
Joints and surfaces we work on
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
When to call us in Cornhill
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
People generally contact us after spotting one of these:
- Failed seals between different materials
- Leaking joints around cladding and façade panels
- Sealant that has lost its bond to the brick or render
- Rigid filler in a joint that should flex
Rented homes near Aberdeen station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- How the joint is cleaned and prepared
- Who turns up on the day
- Whether all the old sealant comes out first
- What happens if they find a problem under the old sealant
Quotes for external mastic in Cornhill
The quote reflects the job in front of us. We take into account:
- Which sealant suits the joint
- How many areas need sealing
- Any working-time requirements on site
- Whether there’s mould to deal with
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
Helping us quote
When you contact us, it’s useful to know:
- A few photos by email, if you can
- Any access issues, like height or stairs
- The rough size of the job
- The type of property
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Walls and rooflines in Cornhill
Cornhill is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Historic houses like Provost Skene's House (about 1.6 miles south-east) are a reminder that the area around Cornhill has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Managing a site like Northfield Academy? Then its movement joints, gutters and trims need looking after like any other building’s. For an older house near a landmark such as St Ninian's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Cornhill is about 1 mile north-west of Aberdeen, in Aberdeen. From the centre of Cornhill to the outskirts, we cover external mastic for every kind of property. Cornhill is one of 63 places in Aberdeen where we work.
We cover every part of AB16, AB25 and AB24 for external mastic. That includes homes and businesses on Rowan Road, Morgan Road and Cairncry Road. You’ll find Cornhill on the A92, which makes it straightforward to reach. Nearby, we also carry out external mastic in Cummings Park (1 mile north-west), Aberdeen (1 mile south-east), Midstocket (1 mile south), Berryden (1 mile east) and Rosemount (1 mile south-east). Further out, we also cover Dyce (4 miles north-west), Portlethen (7 miles south), Cults (3 miles south-west), Cove Bay (4 miles south-east), Torry (3 miles south-east) and Peterculter (6 miles south-west).
Landmarks near Cornhill
Typical jobs here are in homes near Oakbank School, Gilcomstoun Primary School and Stewart Park, among other places. The nearest railway station is Aberdeen station, roughly 1.8 miles south-east. Well-known places in the area include King's Museum (1.3 miles north-east) and Cowdray Medical Pavilion (within half a mile south). For a walk, there’s Rubislaw Quarry and Gallows Hill.
What happens on the day
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours to a few days, depending on the length of joint and the access. For a tenement in Cornhill, work inside your flat is between us and you, while shared parts may need the factor or neighbours to agree. It helps to know which it is when you get in touch.
- Each joint is checked and the colour of the new sealant agreed.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know if you’ve seen damp or leaks
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, drop us a line at info@mrmastic.co.uk.