Portsmouth · England
Cosham Fire Rated Sealant
We cover Cosham for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Cracked or shrunken fire-rated sealant
- Open holes round services passing through fire walls
- Sealant items on a fire risk assessment action list
About our fire rated sealant in Cosham
In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. A new cable run or a replaced pipe can leave an open hole behind. Those are the gaps we close, using a tested fire-rated product. Typical jobs include new service routes left unsealed after building work and fire seals that have cracked with movement, on linear gaps, door frames and service penetrations.
For a pub, café, guest house or shop in or near Cosham, the washrooms and kitchen need the same attention as a big site.
Your job is guaranteed for a year, as with all our work.
- Place
- Cosham (PO6, PO3, PO2)
- Wider area
- Portsmouth
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take from a few hours to a few days, depending on the number of gaps and the access. A visit to Cosham is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We plan the order of work and access, floor by floor or flat by flat.
- Old, damaged or unsuitable sealant is removed.
- Dust and loose debris are cleaned from each gap.
- We apply and tool the sealant to the product’s tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Preparing for the visit
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
Getting a quote
Getting a quote is simple: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we will take it from there.
Related advice
FAQs for Cosham
Do you cover smaller places like Cosham?
Yes. Cosham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Cosham station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Is the work guaranteed?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Towns and villages near Cosham
What else we do in Cosham
Fire rated sealant around Cosham
If you run a hotel, guest house or holiday let in a coastal place like Cosham, heavy use in the busy months is hard on washroom and kitchen sealant, and any building work there should leave fire-rated joints made good. In England, the Regulatory Reform (Fire Safety) Order 2005 requires a fire risk assessment for workplaces and for the common parts of blocks of flats, and gaps around services are often picked up there. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
If you look after a building such as Court Lane Junior Academy, service openings in fire-resisting walls need checking after any refurbishment. Letting a property close to Cosham station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Cosham is about 2 miles south-west of Purbrook, in Portsmouth. Whether you’re in the middle of Cosham or further out, fire rated sealant is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 19 places across Portsmouth, large and small.
Every address in PO6, PO3 and PO2 is covered for fire rated sealant. We cover properties on Dean Road, Park Lane and Elgin Road. Cosham is on the A397, which makes it straightforward to reach. If you’re just outside Cosham, we cover Wymering (1 mile north-west), Hilsea (1 mile south), Drayton (1 mile east), Widley (1 mile north-east) and Paulsgrove (1 mile west). Further out, we also cover Southsea (4 miles south), Milton (3 miles south), Landport (3 miles south), Portsea (3 miles south-west), Portsmouth Point (4 miles south-west) and Fratton (3 miles south).
Local landmarks in Cosham
Locally, jobs take us to homes and businesses close to The First Post pub, Alexandra Park and Springfield School. Cosham has its own railway station: Cosham station. Nearby you will also find Tricorn Centre (2.9 miles south) and World War I Remembrance Centre (1 mile south-east). For a walk, there’s Southmoor Nature Reserve and Portsdown Hill.
How the job changes by surface
Masonry and concrete
Masonry is dusty and porous, so preparation matters. We brush and vacuum the gap and use backing where the detail needs it.
Linear gaps
Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.
What happens if it’s left?
Fire-rated sealants are less forgiving than ordinary ones. How it’s installed changes how it performs, so we follow the maker’s details on every gap. In an older home around Cosham, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we will talk you through it.
Why book with us
- Approved under the ARBOMaster scheme
- Tidy, careful work
- 12-month guarantee on every job
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at our cost guide or what customers say.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Plan fire stopping into any work that goes through walls or floors
- Ask every contractor to reseal any fire stopping they disturb
- Keep photos of seals that will be hidden
- Get damaged fire seals looked at promptly
Do not add foam, filler or ordinary sealant over a fire seal. If it needs repair, use the same type of product. Ask us if you are not sure which product was used.
A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Closing it is generally a straightforward job.
When it is not the sealant
In fairness, some problems need a different trade:
- Sign-off of the building, which sits with building control or your assessor
- Construction that doesn’t provide fire resistance on its own
- Openings too large for sealant, which need batts, boards or another system
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Flats & HMOs
- Door frames
- Service penetrations
- Pipe & cable gaps
- Plasterboard & masonry
- Linear gaps
When to call us in Cosham
If the sealant is too shallow, has the wrong backing or sits on a dusty surface, it is not installed as tested. We see plenty of fire stopping that was hurried particularly when it was the last job before handover.
Keep an eye out for these signs:
- Old fire sealant that has split or come away
- Gaps left after a refit or conversion
- Open holes round services passing through fire walls
- Gaps flagged on a fire risk assessment
For buildings such as Church of St Philip, service openings in its walls need the right fire-rated sealant, as in any building.
Questions to ask before booking
- Whether the sealant suits the joint
- Are they insured?
- How long to leave it before use
- What happens if the job turns out different