Highland · Scotland
Fort William External Mastic
Professional external mastic in and around Fort William, with every bit of old sealant taken out first.
- Panel joints letting water in
- Brick movement joints where the sealant has split
- Failed seals between different materials
External mastic in Fort William
On houses, flats and commercial buildings across Fort William, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on concrete & block, brickwork movement joints and joints between brick and frames, and common reasons people get in touch are rain getting behind render or cladding at a joint and rigid filler in a joint that should flex.
In and around a place like Fort William, many buildings face open ground and take the full weather. Outside joints on exposed walls work hard, so they need a sealant that moves with the building.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Fort William (PH33)
- Region
- Highland
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Tell anyone working on the walls about the movement joints
- Never let anyone fill a movement joint with mortar
- Fix overflowing gutters above sealed joints
- Clear growth from the base of walls and joints
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Common questions in Fort William
I let a flat near Fort William station. Can you help?
Yes, we work for letting agents and landlords. Just email us at info@mrmastic.co.uk and tell us about the property, and we will give you a clear quote.
Is Fort William within the area you cover?
Yes. Fort William is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
What affects the quote in Fort William
The quote reflects the job in front of us. We look at:
- The number of rooms or windows
- Which sealant suits the joint
- Whether there’s mould to deal with
- Any working-time requirements on site
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
- The rough size of the job
- Pictures of the joints, sent by email
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Nearby places to Fort William
More services for Fort William
Common problems we fix in Fort William
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
It’s worth asking for a quote if you see:
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
- Plants rooting in failed movement joints
- Cracked joints where brick meets render or frames
If you let a flat or house near Fort William station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Who turns up on the day
- What happens if the job turns out different
- When the joint can take water or movement
- What product goes in the joint
What external mastic looks like in Fort William
Fort William is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces 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.
If you live in an older home near St Andrew's Episcopal Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Schools such as Lochaber High School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Fort William (Gaelic: An Gearasdan) is in Highland. Every kind of property in Fort William can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our Highland coverage runs to 253 places, and Fort William is one of them. There’s also a page for Glasgow, roughly 74 miles from Fort William.
We cover every part of the PH33 postcode area for external mastic. We cover properties on Monzie Square, High Street and Cameron Road. Main roads around Fort William include the A82 and A830, so getting to you is simple. Close by, we work in Inverlochy (1 mile north-east), Caol (2 miles north), Taobh Lochaidh (2 miles north-east), Banbhaidh (2 miles north) and Corpach (2 miles north). As one of the bigger places in Highland, Fort William has every kind of property, from flats to offices. For island and remote addresses, a little more planning is needed.
Landmarks near Fort William
Typical jobs here are in homes near Black Parks and The Great Glen pub. Fort William has its own railway station: Fort William station. Nearby you’ll also find Inverlochy Castle Hotel (2.9 miles north-east) and Belford Hospital (within half a mile north-east). Not far away are Lochan Lùnn Dà-Bhrà.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How the visit works
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the amount of work. Outside jobs in Fort William need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors is not affected.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
- Plan for the work area to be out of bounds to pets and children
Getting a quote
We do not publish a price list. Instead, we give you a clear quote for your job. To arrange one, email us at info@mrmastic.co.uk.
Related advice
Surface by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Tell us what the building has when you get in touch.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so its sealant has to stay flexible.
What we can’t put right
To be straight with you, some problems need a different trade:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer.
Surfaces we seal
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Copings & trims