Portsea fire stopping
Planning work on a service penetration in Portsea? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Unsealed joints where partitions meet the slab
- Openings found when ceilings come down for a refit
- Old intumescent sealant that has split away
Fire stopping for Portsea sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
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, so it makes sense to get it right first time. In a smaller place such as Portsea, getting a contractor back for a second visit takes time, so it’s worth dealing with every failing joint at once.
The price depends on how many linear metres there are, what has to come out first and the access. Call for a fixed quote once you have the details.
Why appoint us
- One phone line for London, the South East and Scotland
- 12-month guarantee on workmanship
- Fully insured, including public liability cover
- CSCS-carded applicators
Read how commercial sealant jobs are priced and our accreditations.
About our fire stopping in Portsea
Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We don’t hold a third-party fire-stopping installer certificate. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. If you are dealing with unsealed penetrations discovered above suspended ceilings and open linear gaps along the top of fire-resisting walls, we can put it right. A single leaking joint is often how a building in Portsea first comes to us: we look at the rest while we are there and tell you what we find.
Fire-rated sealing in a place like Portsea is typically a single building at a time. Send the specification, drawings or photos of the openings and we will quote to suit.
We stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.
- Where
- Portsea (PO1, PO12, PO5)
- Wider area
- Portsmouth
- Guarantee
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Towns and villages near Portsea
Other services in Portsea
On site: what to expect
We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. What matters most for a job in Portsea is a clear list of what needs doing, so send photos of each area. A fixed quote follows.
- We ask for the product and detail your designer has specified.
- Openings are measured and grouped by detail.
- Improvised fillers and failed sealant are removed.
- Mineral wool or other backing is fitted where required.
- We gun the sealant in to the specified depth around each service and tool it.
- We walk the completed areas with you and confirm the records agreed at quote stage.
Preparing the site
- Point out parking and an unloading spot
- For older buildings, check the asbestos register before work
- Tell us your opening times and when work is allowed
Getting a fixed quote
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, ring 01277 525 020 or send photos by email.
Read more
Questions we are asked in Portsea
Is hospital work, at somewhere like Gosport War Memorial Hospital, something you do?
Yes. Healthcare sites are among the places we work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Do you seal service penetrations in hotels around Portsea?
Yes, where fire-rated sealant is the specified product. Work is done room by room so the hotel keeps trading; design and sign-off stay with the designer and building control.
Will you come and look before quoting?
It depends on the job. Straightforward work can often be priced from photos and measurements, and bigger or more complex jobs normally get a visit.
Can the building stay open while you work?
Usually, yes. Phased work can be planned so areas stay in use.
Can you fit around our working hours?
Mention the site’s hours and access windows in your enquiry, and we will schedule the work to suit. You can reach the office between 8am and 5pm, Monday to Friday.
Are you CHAS accredited and on Constructionline?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.
How do I request a quote?
There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. The first step only needs photos and a postcode.
What sets the cost
Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:
- The size and state of each joint
- How much there is to seal
- Phasing around occupants
- Any access equipment needed
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.
Before you send an enquiry
The more we know, the firmer the quote. Helpful details to send:
- When you need the work done
- Drawings or a marked-up plan, if available
- Asbestos survey details if the building is older
- Where the site is, with the postcode
Need a figure for a tender or a budget? We will quote against your scope and drawings that you can work with. For a chat about it beforehand, speak to us on 01277 525 020 or email drawings and photos.
Fire-rated sealing for Portsea buildings
Central London is about 65 miles from Portsea. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls, and the gaps need sealing with the specified product. Eight care or nursing homes sit less than 2 miles from Portsea. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal.
At a retail site such as Victory Retail Park, 1 mile north-east of Portsea, walls between units may be fire-resisting, so services added in a refit need the specified seal. At a college such as St Vincent College (1.3 miles west of Portsea), checking penetration seals after summer M&E works is good practice. For a hospital such as Gosport War Memorial Hospital, which lies west of Portsea, penetration sealing is usually phased ward by ward, with infection-control rules agreed first.
Portsea is about 1 mile south-west of Portsmouth, in Portsmouth. Anywhere in PO1, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Across Portsmouth, 19 places are covered, Portsea among them.
Anyone looking for fire stopping in PO1, PO12 and PO5 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Streets here include Main Road, Park Road and Scott Road, and sites on any of them can send details for a fixed quote. Close to Portsea, our area also takes in Portsmouth Point (1 mile south), Clayhall (2 miles south-west), Haslar (2 miles south-west), Alverstoke (2 miles south-west) and Privett (2 miles west). A short drive away, we cover Hilsea (3 miles north-east), Wymering (4 miles north-east), Paulsgrove (4 miles north), Cosham (3 miles north-east), Drayton (4 miles north-east) and Farlington (5 miles north-east).
Local landmarks in Portsea
Recent enquiries here include premises near The Ship & Castle pub, St Jude's CofE Primary School and Charter Academy, among other places. There’s a railway station in Portsea itself: Portsmouth Harbour station. Nearby you’ll also find Royal Portsmouth Hospital (0.8 miles east) and Genesis Expo Creationist Museum (under half a mile south). For a walk, there’s Milton Locks and Portsdown Hill.
What the job involves on each surface
Metal pipes
Copper and steel pipes are a common service penetration for fire-rated sealant. The tested detail sets the pipe size range, gap, depth and whether insulation can stay on.
Cables and cable bundles
New data and power cables are the most common breach we see. Openings around new cables are resealed to the detail.
Looking after the joints
After handover, a little attention goes a long way:
- Check with the data sheet before painting over fire sealant
- Look above ceilings when tiles are lifted for other jobs
- Brief every trade that openings they make must be sealed
- Ask the designer to confirm details early on refits
During planned inspections, look at seals in risers, cupboards and voids. Look for cracks, unsealed new cables and gaps that have been enlarged and get them dealt with.
Regular walk-rounds of service areas are worth the time. Catching a damaged seal early keeps the fix small; found late, it can be one of many.
Commercial clients in Portsea
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, and each stage is agreed with your contact.
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.