The Mastic Doctor team standing beside their branded vans outside an office building
Argyll and Bute · Scotland

Expansion joint sealing in Kilmun

Expansion and movement joint sealing in walls, decks and floors in Kilmun and across Argyll and Bute. CHAS accredited and fully insured, with a 12-month guarantee.

  • Hardened, cracked sealant on exposed facades
  • Water dripping through deck or ramp joints
  • Sealant peeling off one face of the joint
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Expansion joint sealing across Kilmun

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

On site: what to expect

We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. For work around Kilmun, we aim for one trip, which is why we ask for photographs and a full list first. External joints need a dry spell as well.

  1. We assess the joints on site or from photos, noting widths and how each has failed.
  2. You receive a fixed quote stating the product and the movement it is rated for.
  3. Where areas have to stay open, we agree a phased sequence before starting.
  4. We strip the old sealant or filler and prepare each face until it’s sound and dry.
  5. Depth is controlled with backing, the faces are primed where the maker calls for it, then the bead is laid and tooled.
  6. Finished joints are inspected, the cure time confirmed and the 12-month guarantee applies.

Getting the site ready

  • Flag any permit to work we will need
  • Move anything stored against the joints
  • Send asbestos survey details if the building is pre-2000

Get a fixed quote

Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or send photos by email.

Get a quick quote

Related advice

Expansion joint sealing in Kilmun, done properly

We cover the full range of movement joints: brickwork and blockwork joints, precast and cladding panel joints, concrete joints, car park decks and ramps, podiums and floor movement joints. The product depends on the movement, the weather and anything that runs over it, and we will confirm the choice in the quote. Most enquiries involve debris jammed in movement joints and damp inside where a wall movement joint has failed, across precast concrete panel joints, podiums and floor movement joints and brickwork movement joints. A single leaking joint is often how a building in Kilmun first comes to us: we look at the rest while we are there and tell you what we find.

In smaller places such as Kilmun, the joints we are asked about sit in workshops, farm sheds, schools and halls. Slabs and yards take vehicles, rain and frost.

Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

Location
Kilmun (PA23)
Wider area
Argyll and Bute
Guarantee
12 months on every job
Quote
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

What we’re called out for in Kilmun

With no backing rod or bond-breaker in place, sealant grips the base of the joint too. Bonded on three faces, it can’t stretch evenly when the joint opens so backing is set before sealing.

If one of these sounds familiar, it’s time for a closer look:

  • Expansion joints filled with dirt and stones
  • Sealant pulling off the joint face
  • Expansion joints split through the centre of the bead
  • Spalled or broken joint edges in floors and decks

In a school such as Dunoon Grammar School, movement joints in brick, block and hall floors tend to be forgotten until they leak.

What to look for in a quote

  • Who will actually carry out the work
  • Their plan for phasing and protecting the area
  • Their pre-qualification and accreditations
  • Which product they’ll use, and why it suits the joint

Our contractor checklist

Floors, slabs and movement joints in Kilmun

Kilmun lies within about 1 mile of the sea. Open joints in coastal car parks and yards let in salt-laden water as well as grit, so it pays to keep them sealed. Being in the west of Scotland, Kilmun gets more rain than eastern areas. Rainwater through open yard and deck joints is a bigger issue here than in the drier east. Dry spells are used for the external joints.

Hospitals like Cowal Community Hospital (2.7 miles south of Kilmun) have multi-storey or surface car parks whose joints carry vehicles round the clock.

Kilmun is about 7 miles north-west of Greenock, in Argyll and Bute. We cover commercial sites throughout Kilmun, for single jobs and planned programmes alike. 124 places across Argyll and Bute fall within our area, Kilmun among them. Our Glasgow page has more on work in that area, about 28 miles away.

We cover the PA23 postcode districts. Buildings on Midge Lane, Shore Road and Graham's Point are within our area for movement joints. Main routes into Kilmun include the A880, useful when we plan access and materials. Nearby places we also cover include Tom nan Ragh (1 mile west), Sandbank (1 mile south), Strone (2 miles south-east), Hunters Quay (3 miles south-east) and Kirn (3 miles south-east). Further afield, our area takes in Helensburgh (8 miles east), Rothesay (12 miles south), Cardross (11 miles east), Rhu (7 miles east), Garelochhead (7 miles north-east) and Port Bannatyne (11 miles south-west). Island and remote sites need extra planning, with travel, ferry crossings where needed and weather to allow for, so mention the location when you call the office on 01277 525 020 or email drawings and photos.

Local landmarks in Kilmun

A little further out are Castle House Museum (3.5 miles south) and Cowal Community Hospital (2.6 miles south). Not far away are Loch Loskin and Clach Bheinn.

Map of Kilmun © OpenStreetMap contributors

What affects the price in Kilmun

These are the things that shape the price:

  • How accessible the joints are
  • Backing rod, priming and other preparation
  • Working within restricted access windows
  • Distance, for remote addresses

The specified product makes a difference, and so does the preparation. Access, phasing and site requirements come into it too.

What we need to price the job

There’s no need for a formal survey. These details are enough to start:

  • When you need the work done
  • The asbestos register, for older buildings
  • How the joints are reached, and at what height
  • The type of building and who uses it

The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or give us a call on 01277 525 020 or email us to discuss it first.

How the job changes by surface

Podium joints

On podiums, the joint can belong to a larger waterproofing detail. Where the specification calls for sealant, we reseal and flag it if the membrane looks like the source.

Brickwork and blockwork joints

Brick and block edges need careful preparation. Faces are prepared and primed wherever the sealant maker calls for it before the bead goes in.

Honest limits

Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. It won’t fix:

  • A joint that has to be widened or re-detailed before it can work
  • Movement on a scale no sealant is meant to absorb
  • Mechanical expansion joint covers, cover plates or proprietary joint systems (a specialist supplier’s job)

Not sure which it is? You can ring 01277 525 020 or email us and we will tell you honestly.

Joints and surfaces we work on

  • Blockwork control joints
  • Brickwork movement joints
  • Precast concrete panel joints
  • Podiums and floor movement joints
  • Car park decks and ramps
  • Cladding panel joints

What happens if it’s left?

On a car park, resealing joints in phases keeps the deck open. Phased work by bay or zone lets the rest stay in use without shutting the whole car park. We agree phasing with you before work starts. In Scotland, wind-driven rain finds a failed joint quickly, so it’s worth renewing joints around Kilmun before they leak.

Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.

Why clients in Kilmun choose us

  • A range of standard colours, depending on the product
  • 12-month guarantee on workmanship
  • Matching to RAL references, product permitting
  • Clear, fixed quotes

See what affects the cost or our accreditations and insurance.

Common questions from Kilmun clients

Is a hospital such as Cowal Community Hospital somewhere you can work?

Yes. Healthcare sites are among the places we work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Is Kilmun too small for you to travel to?

No. Small places get the same service as large ones. Our area covers all of Scotland, cities, towns and islands alike. Good photos up front let us bring everything on the first visit.

What do you charge?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we’ll price it properly.

Will you just go over the old sealant?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

Who decides which product is used?

A specification, where there is one, decides it. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

What happens if it rains on the day?

Weather matters for any external joint because a damp or frozen joint won’t take a proper bond. Internal floor joints are far less affected.

Why has the sealant in our expansion joints split?

It depends on how the sealant has let go: a split through the middle points to over-stretching, while peeling from one face points to preparation or primer. Sometimes the edge material itself has failed.

Accreditations

Trusted. Accredited. Insured.