Perth and Kinross · Scotland
External & façade joints in Acharn, Perth and Kinross
Sealing brickwork movement joints, render, cladding and façade joints in Acharn, with a 12-month guarantee on every job. Call for a quick quote.
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Rigid filler in a joint that should flex
External mastic in Acharn
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. Typical jobs include water getting into walls through failed joints and panel joints letting water in, on concrete & block, joints between brick and frames and brickwork movement joints.
Outside joints can only be sealed when they’re dry, so work in Acharn depends on the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
Your job is guaranteed for a year, as with all our work.
- Location
- Acharn (PH15)
- Wider area
- Perth and Kinross
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Different surfaces, different methods
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so neither cracks the other.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best year round.
Landlord and commercial work in Acharn
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured for the work.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
- On commercial sites, let us know about site rules
Ask for a quote
To get a quote, email us at info@mrmastic.co.uk with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Advice
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What else we do in Acharn
Signs you need external mastic in Acharn
If plants are growing out of a joint, the sealant has normally failed or was never there. Dirt and roots then trap moisture in the joint and make things worse.
People usually contact us when they notice something like this:
- Brick movement joints where the sealant has split
- Sealant that has lost its bond to the brick or render
- Plants rooting in failed movement joints
- Leaking joints around cladding and façade panels
In the older streets around Kenmore Parish Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before booking anyone
- Who turns up on the day
- How the surfaces are prepared before sealing
- Whether VAT is included
- When the joint can take water or movement
Acharn buildings and the weather
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. Acharn is in the west of Scotland, which is wetter than the east, so there’s plenty of rain for movement joints and outside wall joints to keep out.
In and around Acharn, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Acharn is about 25 miles north-west of Perth, in Perth and Kinross. We provide external mastic to homes and businesses in Acharn, as part of our work across Perth and Kinross. Our Perth and Kinross coverage runs to 107 places, and Acharn is one of them. You can also see our page for Dundee, about 40 miles away.
Every address in PH15 is covered for external mastic, from the main roads to the quietest streets. We also cover the places around Acharn: Kenmore (1 mile north-east), Fearnan (2 miles west), Boreland (3 miles west), Aberfeldy (7 miles north-east) and Little Ballinluig (11 miles north-east). We also work in nearby towns such as Crieff (15 miles south-east), Pitlochry (14 miles north-east) and Comrie (14 miles south).
Landmarks near Acharn
Well-known places in the area include Taymouth Castle (1.5 miles north-east) and Scottish Crannog Centre (0.8 miles north-east). The countryside around Acharn includes Drummond Hill.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Show decorators and builders where the movement joints are
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
- Walk round the building once a year and look at the joints
Don’t paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
Common questions in Acharn
Is external mastic in Acharn guaranteed?
All our work, in Acharn and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Will you come out to Acharn?
Yes. Acharn is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Can you quote for more than one area?
Yes. Just list everything you need.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
What information do you need?
Tell us what needs doing and where, plus photos if you have them. We will ask anything else we need to know.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Around Acharn, water from a failed joint in an older stone home can soak into timber and plaster.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and give you a clear quote before we start.
Why Acharn clients choose us
- We agree the colour with you first
- Old sealant always removed completely
- Domestic, commercial and hotel work
- A choice of colours where the product allows
Take a look at how sealant jobs are priced and customer reviews.