Mastic Sealing in Dunoon
Mastic sealing for building owners, managing agents and housing associations throughout Dunoon and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.
- Window mastic that has split and shrunk
- Complaints coming in block by block
- Patchy repairs in mismatched sealant
Mastic sealing near Dunoon
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
How the quote is worked out
The price varies from site to site. It mainly depends on:
- Phasing around occupants
- Induction, permit and paperwork requirements
- The size and state of each joint
- Any access equipment needed
What a job costs comes down to how many linear metres there are, how much old material needs removing and the access. Call for a quote once you have the details.
What we need to price the job
Good information means a firmer quote. When you get in touch, include:
- When you need the work done
- How the joints are reached, and at what height
- A wide shot and a close-up of the area
- Approximate linear metres or a joint schedule
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, give us a call on 01277 525 020 or email drawings and photos.
How we handle mastic sealing in Dunoon
Different joints need different sealants. Low-modulus neutral-cure silicone suits many window perimeters and external movement joints, and MS polymer sealants stick well to many substrates and often take paint. We’ll confirm the colours available for the specified product. We work on window and door perimeters on blocks, communal entrances and stairwells and balcony and threshold joints, and what we are called in for most is a mix of products and colours from past repairs and leaks at window and door perimeters. Whoever orders the work in Dunoon, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
For buildings around Dunoon, we group the work to keep travel and visits down. A list of addresses and photos lets us quote for them together.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Where
- Dunoon (PA23)
- Region
- Argyll and Bute
- Guarantee
- A 12-month guarantee
- Quote
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Looking after buildings in and around Dunoon
Dunoon is within about 1 mile of the coast. Blocks and commercial buildings facing the sea take the most weather on their window perimeters and external joints; plan inspections around that. The west of Scotland, where Dunoon is, gets more rain than the east. Frame mastic on weather-facing sides tends to fail first. We plan block programmes with the forecast in mind.
Older community buildings, St John’s Church (Dunoon) among them, often have frames of mixed ages whose mastic varies. Blocks of flats and mixed-use buildings often cluster around stations such as Inverkip station (3.9 miles south-east of Dunoon) and their window and balcony mastic tends to age at the same rate across a building.
Dunoon (Gaelic: Dùn Obhainn) is about 6 miles west of Greenock, in Argyll and Bute. We cover Dunoon and the rest of Argyll and Bute, with the same fixed quotes and 12-month guarantee as everywhere else. Our Argyll and Bute coverage takes in 124 places. We also cover Glasgow, some 26 miles away.
Anyone looking for mastic sealing in PA23 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Buildings on Queen Street, Queens Court and Pilot Street are within our area for mastic joints. Being close to the A815 and A885, Dunoon is easy to get to with materials and equipment. If your building is just outside Dunoon, we cover Kirn (1 mile north-east), Hunters Quay (1 mile north-east), Bullwood (2 miles south), Sandbank (2 miles north) and Strone (2 miles north). Bigger towns within reach include Helensburgh (9 miles north-east), Rothesay (10 miles south-west), Cardross (11 miles east), Rhu (7 miles north-east), Garelochhead (10 miles north-east) and Port Bannatyne (9 miles south-west). Dunoon is one of the busier places in Argyll and Bute, and its commercial and public buildings are all within our area. 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 Dunoon
In Dunoon, that means premises near Dunoon Grammar School, among other places. The nearest railway station is Inverkip station, about 3.9 miles south-east. Nearby you’ll also find Dunoon Castle (0.6 miles south) and Castle House Museum (0.6 miles south). For a walk, there’s Loch Loskin.
Surface by surface
Communal areas
Low-level communal joints get damaged more than most, so they often need renewing sooner.
Tenement and older buildings
Stone needs a neutral-cure product, so we pick a grade that won’t mark it.
How a job runs
Working in a building that stays open takes some planning. We sign and contain the area we’re in, with routes through the building left open and work section by section so the rest of the building stays in use. Travel to smaller Scottish places like Dunoon is planned so the job is finished in one visit where possible, which is why we ask for photos and a full list first. Outside work also needs a suitable weather window.
- Each block or building is walked and the failed joints recorded with the likely cause.
- A fixed quote follows, split by block or building if that suits you.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- Old sealant is stripped and each face prepared back to firm material.
- Backing rod and primer go in where the joint and the product need them, then new sealant is applied and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
What we need from you
- Have the specification and drawings to hand
- For older buildings, check the asbestos register before work
- Arrange parking or a loading space
Get a fixed quote
A handful of photographs and a postcode is the fastest way to a quote. Upload them with the quote form, or phone 01277 525 020 or send details through our quote form to discuss it first.
Related advice
More services for Dunoon
Doing it in-house
What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
For managing agents and facilities managers
Whether you’re a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.
FAQs: Dunoon
Will you take on a block within reach of Inverkip station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Send the address, photos of the elevations and your access arrangements, and we’ll give a fixed quote.
Our building in Dunoon is near the coast: does that change the sealant?
It can. Coastal exposure works external joints harder than inland weather. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.
Do you work for managing agents and housing associations?
Yes, that’s exactly who this service is for. We work through buildings in a planned order with dates agreed in advance.
Will you just go over the old sealant?
No, never. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
Who decides which product is used?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Can you send RAMS and CSCS details before starting?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We are CHAS accredited and a Constructionline member.
Can you follow the specification on our project?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.
What we are called out for in Dunoon
We often find joints filled solid with no backing rod so the mastic is bonded on three sides. That three-sided adhesion stops it stretching and splits as the building moves.
Typical triggers for a call:
- Communal area joints that look neglected
- Patchy repairs in mismatched sealant
- Mastic failing across several blocks on an estate
- Leaks at window and door perimeters
For a school such as Dunoon Primary School And Janitor's House, perimeter mastic on windows and doors is a holiday job.
What to look for in a quote
- How they’ll work around occupants
- What the guarantee covers, and for how long
- Their pre-qualification and accreditations
- Whether primer will be used where the manufacturer specifies it