Fire-rated sealing and fire stopping in Greenock, Inverclyde
Planning work on a service penetration in Greenock? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Fire seals cut back for extra cables and never reinstated
- Non-fire-rated filler around services
- Fire-rated sealant that has cracked or shrunk back
Fire stopping near Greenock
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
What sealant work can’t fix
Before quoting, we check that sealant is the right answer. It won’t put right:
- Large openings beyond what any sealant detail covers
- Walls or floors that aren’t fire-resisting to begin with
- Fire risk assessments, a job for a competent assessor
If in doubt, phone 01277 525 020 or send details through our quote form and we will say what we think.
Joints and surfaces we work on
- Joints between fire-resisting walls and floors
- Pipe penetrations
- Service gaps in risers
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows
- Cable penetrations
Fire stopping in Greenock, done properly
Sealant is the specified answer for plenty of openings, such as metal pipes, cables and some small ducts where the detail covers them. Other openings need collars, wraps, batts, pillows or boards. If the detail calls for something other than sealant, we say so rather than force sealant into it. We work on small duct penetrations where the tested detail allows, joints between fire-resisting walls and floors and linear gaps at wall heads, and what we are called in for most is fire stopping installed outside its tested range and unsealed openings around new pipes and cables. Whether you call it commercial sealant work, mastic application or joint sealing, in Greenock it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Fire-rated sealing in Greenock follows the specification set by the designer: the designer, fire engineer or verifier sets and accepts the detail, and our applicators install it. Any record-keeping you need is agreed at quote stage.
Every job is signed off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.
- Location
- Greenock (PA16, PA15, PA19)
- Region
- Inverclyde
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Why deal with it now?
An improvised seal can look finished while offering no tested performance. The fix is to remove it and reinstall to the detail. Water through a failed joint in a building in Greenock can spoil ceilings, floors and stock. Putting it right early limits the damage.
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.
What you get with us
- Commercial sealant work since 2005
- Specification-led, product-correct work
- Fully insured
- 12-month guarantee on workmanship
Read our cost guide or how we’re accredited.
Also near Greenock
More services for Greenock
Your questions answered
Will you take on work at estates like Cappielow Trade Park, close to Greenock?
Yes, sites like Cappielow Trade Park are within our area, along with the rest of Greenock. A few photos and the unit address let us price the work.
Will you plan work around the academic year at somewhere like West College Scotland - Greenock Campus?
Yes, holiday working periods are the norm on campus jobs. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Do you hold third-party fire-stopping installer certification?
No, and we won’t imply otherwise. Third-party schemes aren’t a legal requirement, but many clients and main contractors ask for them. Where it isn’t required, we install the specified sealant to the maker’s details.
Does weather matter for sealant work?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Internal work is far less affected.
Can you tell us what fire stopping our building needs?
No, that isn’t our role. Once you have a specification, we can price and install the sealant elements of it, and tell you if a detail needs another product.
Do you work in Greenock?
Yes. Greenock falls within our area, and the simplest way to start is to speak to us on 01277 525 020 or email drawings and photos.
Are you fully insured?
Yes. Mastic Doctor is fully insured, public liability included.
Compartment walls and floors in Greenock
Scotland has its own building standards: the non-domestic Technical Handbook (clause 2.1.14) says service penetrations should be fire stopped to at least the fire resistance duration of the wall or floor, with products tested for that end use. We install what’s specified, to the product’s tested detail. Greenock has several hotels close by, all within 2 miles. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close.
For a unit at a site such as Cappielow Trade Park (1.8 miles east of Greenock), new power or data runs between office and warehouse can breach a compartment wall. Hotels like Tontine Hotel (0.7 miles north of Greenock) are refurbished in phases, and each phase can open up compartment walls. For a unit at a centre such as Oak Mall (0.7 miles north-east of Greenock), penetration seals are worth checking after each shop fit.
Greenock is about 20 miles west of Glasgow, in Inverclyde. Commercial clients in Greenock use us for work on service penetrations. Across Inverclyde, 19 places are covered, Greenock among them. For work in that direction, see our Glasgow page, about 20 miles away.
Commercial sites across PA16, PA15 and PA19 are covered for service penetrations. We cover commercial and managed buildings on High Street, Main Street and Murdieston Street. Access to Greenock is via the A8 and A78. We also cover Greenock West (1 mile north), Cartsdyke (1 mile east), Branchton (1 mile west), Fort Matilda (1 mile north-west) and Braeside (2 miles west). Bigger towns within reach include Port Glasgow (4 miles east), Kilmacolm (7 miles south-east), Mid Auchinleck (4 miles east), Inverkip (4 miles south-west), Bogston (3 miles east) and Bardrainney (5 miles east).
Around Greenock
Recent enquiries here include premises near The James Watt pub and Watt Library, among other places. Greenock has its own railway station: Drumfrochar station. Other landmarks nearby include McLean Museum and Art Gallery (0.6 miles north-east) and Oak Mall (0.7 miles north-east). Green spaces nearby include Lyle Hill.
For managing agents and facilities managers
Whether you are 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.
Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, with CSCS-carded applicators on site.
General trades versus a specialist
Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.
On site: what to expect
The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. In a Scottish town such as Greenock, outside work is planned around the weather and inside work around the occupants. Photos or drawings let us give a fixed quote and a realistic plan.
- First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Unsuitable fillers and loose debris are taken out of each opening.
- Mineral wool or other backing goes in wherever the detail asks.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Before we start on site
- Confirm the product named in the specification
- Share your working hours and any access restrictions
- Tell staff and tenants when we will be in
Getting a fixed quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
Read more
Different surfaces, different methods
Small ducts
Some fire-rated sealant details cover small ducts. Bigger ducts and fire-resisting ductwork are normally handled with other products, and we will say if that applies.
Plastic pipes
Plastic waste pipes through slabs come up often. Whether sealant alone is acceptable depends entirely on the tested detail, and we will never swap a specified collar for sealant.