Fire Stopping in Thorney Island
Sealant work in Thorney Island for main contractors, managing agents and facilities managers: fire-rated and intumescent sealing of service penetrations and linear gaps, quoted at a fixed price.
- Fire sealant pulled out of the opening
- Penetration schedules that need working through
- Damaged fire seals in risers and voids
Need fire stopping in Thorney Island?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
On site: what to expect
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, primer goes on where the manufacturer specifies it, and the sealant is tooled off neatly. Smaller jobs around Thorney Island can be grouped with others nearby. A fixed quote is given before anything starts.
- We ask for the product and detail your designer has specified.
- We sort the openings by the detail each one needs.
- Improvised fillers and failed sealant are removed.
- Where the detail needs backing, it goes in at the stated depth.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- Completed areas are checked with you, with the records agreed when we quoted.
Getting the site ready
- Tell us which areas need to stay in use
- Make sure the joints can be reached
- Warn occupants and staff about the work
Getting a fixed quote
The quickest route to a quote is a few photos and the site postcode. Upload them with the quote form, or call 01277 525 020 or email the details over to discuss it first.
Advice
Fire stopping in Thorney Island
Most of our fire stopping work happens after the building is up. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls. Those on your schedule are closed with the specified product. If you have old intumescent sealant that has split away and damaged fire seals in risers and voids, we can put it right, whatever the surface. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Thorney Island, preparation and product choice get the time they need.
Rural conversions around Thorney Island can put new fire-resisting partitions inside older structures. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.
We stand behind the joints we seal with a 12-month guarantee. That covers our preparation and application, and we come back if anything isn’t right.
- Location
- Thorney Island (PO10)
- Wider area
- West Sussex
- Cover
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
When something else is needed
Before quoting, we check that sealant is the right answer. It isn’t the answer for:
- Gaps in walls that were never built as compartment walls
- Deciding what a wall or floor needs, which belongs to the designer
- Large openings beyond what any sealant detail covers
If you are not sure, just call the office on 01277 525 020 or email a schedule or drawings and we will give you a straight answer.
Joints and surfaces we work on
- Pipe penetrations
- Service gaps in risers
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
Should maintenance staff do it?
Some joints are best left to specialists: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Nearby places to Thorney Island
More services for Thorney Island
Questions we’re asked in Thorney Island
Will you work in a care home in Thorney Island without moving residents out?
Yes. Care settings are planned area by area, at times agreed with the home. Tell us about any infection-control or safeguarding requirements and we will work to them.
Will you take on work at estates like Finchwood Farm Industrial Estate, close to Thorney Island?
Yes. Estates, retail parks and business parks around Thorney Island, Finchwood Farm Industrial Estate among them, are all within reach. Photos and a short description are enough for a first look.
Can the sealant be colour-matched?
Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We confirm what’s available for the specified product when we quote.
How long does a job like this take?
We plan the time on site around your programme and access. You will have an expected duration with the quote.
Do you have public liability insurance?
Yes. Mastic Doctor is fully insured, public liability included.
Will you quote for a small job?
We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.
Will you sign off the seals for us?
No. Sign-off belongs to the designer or building control, not the installer. We’ll confirm the product and detail installed and agree any further records when we quote.
Fire-rated sealing for Thorney Island buildings
For England, the fire stopping of penetrations is dealt with in Approved Document B. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. We install whatever has been specified, to the product’s tested detail. The 2 miles around Thorney Island include two care or nursing homes. In a care home, any new pipe or cable through a fire-resisting wall should be sealed to the specified detail.
Schools such as Thorney Island Community Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards. Where a unit on an estate such as Finchwood Farm Industrial Estate, 1.9 miles south-west of Thorney Island, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail.
Thorney Island is about 4 miles south-east of Havant, in West Sussex. We cover Thorney Island, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Thorney Island is one of 373 places we cover in West Sussex for service penetrations. Portsmouth is covered too, around 7 miles from Thorney Island.
Commercial sites across PO10 are covered for service penetrations. If your site is on Hunter Road, Emsworth Road and Spartan Close or close by, we can quote for service penetrations. Just outside Thorney Island, we also work in West Thorney (1 mile south-east), North Hayling (1 mile west), Tye (1 mile south-west), Northney (1 mile west) and Emsworth (2 miles north). Bigger towns within reach include Bognor Regis (11 miles east), Chichester (7 miles east), Selsey (9 miles south-east), Portfield (7 miles east), Yapton (14 miles east) and East Wittering (5 miles south-east).
What’s near Thorney Island
Around Thorney Island, our work takes us to commercial buildings near Bourne Community College and Eames Farm. The closest station to Thorney Island is Southbourne station, roughly 1.8 miles north-east. A little further out are Havant War Memorial Hospital (3.2 miles north-west) and Emsworth Museum (1.6 miles north). The countryside around Thorney Island includes Nutborne Marshes.
Common problems we fix in Thorney Island
Head-of-wall joints and wall-to-wall junctions are frequent weak points. Deflection and building movement can open these gaps, and the wrong product can split as a result. Linear joint details set a width range and movement capability, and the seal has to sit within them.
If one of these sounds familiar, it’s time for a closer look:
- Seals that don’t match their tested detail
- Service penetrations left open after M&E works
- Fire sealant pulled out of the opening
- Penetration schedules that need working through
Theatres, wards and plant rooms at sites like Havant War Memorial Hospital (3.2 miles north-west of Thorney Island) all have compartment walls crossed by services.
What your quote should include
- The named product and why it was chosen
- Who will actually carry out the work
- The terms of the workmanship guarantee
- Proof of insurance
Maintenance after handover
For the best life from the joints:
- Don’t let anyone top up a fire seal with the wrong product
- File the specified details where the next contractor can find them
- Make fire stopping part of every scope that crosses a fire-resisting wall
- Treat an open penetration as a priority repair
Once the seals are in, tell other trades they exist and must not be disturbed. If a seal has to be opened for a new service, it should be reinstated to the same detail.
Specify fire stopping early on refits, not as an afterthought. Details can then be picked to suit the actual pipes, cables and ducts.
What happens if it’s left?
A seal that doesn’t match its tested detail gives false comfort. Correcting it means cutting it out and starting again with the specified product. For buildings around smaller places like Thorney Island, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Resealing early avoids that.
Pricing service penetrations depends on quantities, condition and access. Call for a quote.
What you get with us
- Health and safety: CHAS accredited
- Old sealant cut out, never sealed over
- Workmanship guaranteed for 12 months
- Products installed to the manufacturer’s instructions
Read our cost guide and how we’re accredited.