Argyll and Bute · Scotland
External Mastic in Strone
Specialist external mastic for Strone: careful preparation, the right product and tidy work. Call for a quick quote.
- Damp patches traced to an open external joint
- Failed sealant between panels on a façade
- Hard, crazed mastic that has stopped moving
External mastic in Strone
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. If you’re dealing with sealant that has lost its bond to the brick or render and weeds or debris growing in open joints, we can help, whatever the surface.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Outside joints on exposed walls work hard, so they need a sealant that moves with the building.
All our work is covered by a one-year guarantee.
- Location
- Strone (PA23)
- Region
- Argyll and Bute
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What we are called out for in Strone
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Any of these means the joints need attention:
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
- Water getting into walls through failed joints
- Failed seals between different materials
If you look after a building such as Dunoon Grammar School, larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
- Who does the work, and how experienced they are
- How long to leave it before use
Places near Strone
What else we do in Strone
How the job changes by surface
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
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.
Landlord and commercial work in Strone
If you manage several properties in or around Strone, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
What we cannot put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Movement that is more than a sealant joint can take
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer.
Where we work in Strone
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
Walls and rooflines in Strone
Strone is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Rented homes near Gourock station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around Strone Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Strone is about 6 miles north-west of Greenock, in Argyll and Bute. Wherever you are in the PA23 postcode area, we can carry out external mastic at your property. Our area takes in 118 places across Argyll and Bute. Glasgow is on our list too, about 26 miles from Strone.
Our applicators cover all of the PA23 postcode area for external mastic and the streets around it. That includes homes and businesses on High Road, Shore Road and Westfield. If you are just outside Strone, we cover Hunters Quay (1 mile south), Sandbank (1 mile west), Kilmun (2 miles north-west), Kirn (2 miles south) and Dunoon (2 miles south). Further out, we also cover Helensburgh (7 miles east), Rothesay (12 miles south-west), Rhu (5 miles north-east), Garelochhead (7 miles north-east), Port Bannatyne (11 miles south-west) and Innellan (7 miles south). If you are somewhere remote, the job takes a little more planning.
Local landmarks in Strone
The nearest railway station is Gourock station, about 3.8 miles south-east of the centre. A little further out are Cowal Community Hospital (2.1 miles south-west) and Castle House Museum (2.9 miles south). Green spaces nearby include Lyle Hill and Loch Loskin.
What happens on the day
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It usually takes anything from a few hours to several days, depending on the building. Outside jobs in Strone 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 is not affected.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
Getting a quote
We don’t publish a price list. Instead, we give you a clear quote for your job. To get started, email us at info@mrmastic.co.uk.
Related advice
Strone questions
Is external mastic in a coastal place like Strone any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is Strone within the area you cover?
Yes, Strone is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. We’ll talk through colour options before we start, matched as closely as the range allows.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
How long does external mastic take?
Typically it takes anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we’ll say how long yours will take.
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.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
What affects the quote in Strone
You will get a clear quote before work begins. It takes into account:
- Any mould that needs treating
- How easy the joints are to reach
- How much there is to do
- The old material and how stubborn it is
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we’ll explain what it covers.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Keeping the joints in good condition
Looking after new joints is easy:
- Have failed joints looked at early
- Do not let climbing plants root in the sealant
- Deal with leaking gutters that soak the joints below
- Make sure movement joints are not pointed over
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.