Highland · Scotland
External Mastic in Slackbuie
External mastic for Slackbuie, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
External mastic in Slackbuie
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 rarely last long. We strip the joint back and start again. We work on render & cladding joints, façade panels and brickwork movement joints, and people most often call us about plants rooting in failed movement joints and hard, crazed mastic that has stopped moving.
Outside joints can only be sealed when they’re dry, so work in Slackbuie depends on the weather, and longer journeys are planned in advance. Let us know about access to every wall and roofline.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Where
- Slackbuie (IV2)
- Region
- Highland
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Common questions in Slackbuie
Can you do external mastic in Slackbuie?
Yes, Slackbuie is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear quote.
Can you help a landlord with a rental near Inverness station?
Yes. We work for landlords and letting agents as well as householders. Just email us at info@mrmastic.co.uk with the address and what needs doing, and we’ll give you a clear quote.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
How long does external mastic last?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces, primed where needed.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we’re using and why.
How long will you be here?
Most jobs take anything from a few hours to several days, depending on the building, including preparation and clearing up. Your quote will say how long we expect yours to take.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Other services in Slackbuie
Aftercare tips
A little care helps the new joints last. We recommend:
- Don’t let climbing plants root in the sealant
- Keep water from gutters off the wall
- Ask before painting over external sealant
- Get split or bare joints resealed while the damage is small
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Render that is blown, hollow or coming away
- Walls that need new movement joints cut into them
- Damp that isn’t coming from the joint
If you are not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before booking.
Joints and surfaces we work on
- Façade panels
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Outside jobs in Slackbuie need a dry day, because sealant won’t bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Mention any tricky access
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
How to get a quote
Every job is quoted individually. Just drop us a line at info@mrmastic.co.uk with the details and send pictures if you have them.
Read more
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The size of the job
- How easy the joints are to reach
- Any mould that needs treating
- The number of rooms or windows
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- Where the property is
- The rough size of the job
- The problem you’ve noticed
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll take it from there.
External mastic in Slackbuie: local notes
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that. Slackbuie 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.
If you let a flat or house near Inverness station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Slackbuie is about 2 miles south of Inverness, in Highland. Every kind of property in Slackbuie is covered for external mastic, old or new, large or small. The work is guaranteed for a year. 253 places in Highland are on our list.
Here we cover the IV2 postcode area for external mastic. Whether your property is on Bracara Road, Orchid Avenue and Willow Avenue or anywhere close by, we can help. We also cover the places around Slackbuie: Lochardil (1 mile north-west), Hilton (1 mile north), Inverness (2 miles north), Ballifeary (2 miles north-west) and Crown (2 miles north). Within a short drive, we also cover Cradlehall (4 miles north-east), Merkinch (3 miles north-west), Dingwall (13 miles north-west), Muir of Ord (10 miles north-west), Fortrose (10 miles north) and Conon Bridge (12 miles north-west). For island and remote addresses, a little more planning is needed.
Landmarks near Slackbuie
Locally, jobs take us to homes and businesses close to Whin Park and Inverness Royal Academy. Slackbuie’s nearest station is Inverness station, roughly 2.3 miles north. Other landmarks nearby include Eastgate Shopping Centre (2.2 miles north) and Royal Northern Infirmary (1.8 miles north). Open spaces near Slackbuie include Tomnahurich and Loch Dochfour.
What we are called out for in Slackbuie
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
Most people get in touch after spotting one of these:
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
- Damp patches traced to an open external joint
- Gaps where render, brick and frames meet
In and around Slackbuie, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- How the colour is chosen
- When the joint can take water or movement
- The length of the guarantee
- Which sealant they’ll use, and why
What the job involves on each surface
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.