Perth and Kinross · Scotland
External & façade joints in St Fillans, Perth and Kinross
Specialist external mastic for St Fillans: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
- Failed seals between different materials
St Fillans buildings and the weather
Harled (roughcast) walls are common in Scotland, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
For an older house near a landmark such as Church Of The Holy Spirit, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
St Fillans is about 20 miles north of Stirling, in Perth and Kinross. Every kind of property in St Fillans is covered for external mastic, old or new, large or small. The work is guaranteed for a year. St Fillans is one of 107 towns and villages in Perth and Kinross where we work. For nearby work, see our Glasgow page (38 miles or so).
Postcode districts we cover here for external mastic: PH6. Whether your property is on Dundurn Walk and Manse Lane or a nearby road, our applicators can take on the job. Other places close to St Fillans include Comrie (5 miles east), Lochearnhead (7 miles west), Killin (9 miles north-west), Strathyre (10 miles south-west) and Callander (11 miles south).
What’s near St Fillans
Open spaces near St Fillans include Creag Odhar and Loch Boltachan.
How we handle external mastic in St Fillans
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. Typical jobs include water getting into walls through failed joints and joints pointed up with cement by mistake, on joints between brick and frames, concrete & block and façade panels.
External sealant needs dry surfaces, so outdoor work around St Fillans is planned around the weather. Let us know about access to every wall and roofline.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- St Fillans (PH6)
- Wider area
- Perth and Kinross
- Cover
- A year, on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- Which sealant suits the joint
- Whether the work is at height
- Any working-time requirements on site
- Whether there’s mould to deal with
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please send an email to info@mrmastic.co.uk and we will talk you through it.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- If someone has resealed it before
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few pictures by email make the job easier to understand, and we will take it from there.
Also in St Fillans
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
FAQs for St Fillans
What guarantee comes with external mastic in St Fillans?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Is St Fillans within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
How much does external mastic cost in St Fillans?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
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.
How often do external joints need resealing?
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. Our work comes with a one-year guarantee.
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why us?
- We agree the colour with you first
- ARBOMaster approved applicator
- Every job guaranteed for a year
- A choice of colours where the product allows
See our cost guide or customer reviews.
Signs you need external mastic in St Fillans
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
People generally contact us after spotting one of these:
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
- Failed seals between different materials
- Sealant that has lost its bond to the brick or render
In and around St Fillans, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- What insurance they hold
- The length of the guarantee
- Is the old sealant removed completely?
- What preparation is included
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. Around St Fillans, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Keep pets and children clear of the area while we work
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Related advice
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Render that’s blown, hollow or coming away
- Subsidence or other structural problems
- Adding movement joints to masonry that has none
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think before you book.
Joints and surfaces we work on
- Concrete & block
- Render & cladding joints
- Copings & trims
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.