Aberdeen · Scotland
External Mastic in Corsehill
External mastic across Corsehill and nearby, with old sealant always removed completely.
- Weeds or debris growing in open joints
- Rigid filler in a joint that should flex
- Panel joints letting water in
How the job changes by surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two.
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
How we handle external mastic in Corsehill
On houses, flats and commercial buildings across Corsehill, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you have leaking joints around cladding and façade panels and damp patches traced to an open external joint, we can put it right.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. On newer homes, the movement joints and roofline trims are what need watching.
You get a one-year guarantee, the same in Corsehill as everywhere else we work.
- Where
- Corsehill (AB21)
- Wider area
- Aberdeen
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Looking after it afterwards
After the cure time, these simple habits help:
- Never let anyone fill a movement joint with mortar
- Fix overflowing gutters above sealed joints
- Check the sealant is paintable before painting near it
- Point out the joints to other trades
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Common problems we fix in Corsehill
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
The most common problems we see are:
- Joints pointed up with cement by mistake
- Old sealant gone brittle and cracked
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
For site and facilities teams at buildings such as Dyce Academy, larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- What preparation is included
- How hidden problems are handled
- Who turns up on the day
- How the colour is chosen
For landlords and businesses
For anyone letting property in or around Corsehill, several properties can be quoted together. Just tell us the addresses and what each one needs.
We also work for property managers and facilities teams in Corsehill and across Aberdeen. We can quote a run of properties together, and we’re fully insured.
What we do, step by step
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. For a place like Corsehill, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We look at every joint and agree a colour to suit the wall.
- 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.
Getting ready for the visit
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, email us at info@mrmastic.co.uk.
Advice
Your questions about external mastic in Corsehill
Is Corsehill within the area you cover?
Yes, we do. We work across all of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do external mastic in Corsehill?
Yes. We work across all of Scotland, and Corsehill is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job, and we will give you a clear quote.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
What is a movement joint?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
How long does external mastic take?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer.
Do you have insurance?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
Outside joints around Corsehill
Plenty of Scottish homes have harled walls, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface. Aberdeen is known as the Granite City, and granite is hard and dense, so any sealant against it needs clean, sound edges to grip.
For landlords with property near Dyce station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Corsehill is about 5 miles north of Aberdeen, in Aberdeen. If you need external mastic in Corsehill, it’s easy to get a quote: please drop us a line at info@mrmastic.co.uk. We cover Aberdeen from our Crawley base. Across Aberdeen, we cover 63 places, Corsehill among them.
Work in AB21 works the same way as everywhere else we cover. Close by, we work in Dyce (2 miles south-west), Whitecairns (2 miles north-east), Kinmundy (2 miles north-west), Potterton (2 miles east) and Kingseat (2 miles north). Larger places within reach include Aberdeen (5 miles south), Rosemount (5 miles south), Berryden (5 miles south), Ferryhill (6 miles south), New Aberdeen (6 miles south-east) and Tillydrone (4 miles south-east).
Local landmarks in Corsehill
Corsehill’s nearest station is Dyce station, about 1.9 miles south-west of the centre. A little further out are Kingseat Hospital (2.5 miles north). Green spaces nearby include Corby Loch and Badgers' Hill.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- The type of sealant required
- How much there is to do
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- The address or postcode of the job
- What’s wrong with the joints now
- The type of property
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, send an email to info@mrmastic.co.uk.
Towns and villages near Corsehill
What else we do in Corsehill
What sealant work cannot fix
We’ll always be straight with you, so here’s what new sealant won’t do:
- Loose or hollow render, which needs re-rendering
- Movement that’s more than a sealant joint can take
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly.
What we seal
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Concrete & block
- Joints between brick and frames