The Mastic Doctor team standing beside their branded vans outside an office building
Hampshire · England

Rowner fire stopping

We carry out fire-rated and intumescent sealing of service penetrations and linear gaps in Rowner and the surrounding area. Send photographs or drawings for a fixed quote.

  • Open linear gaps along the top of fire-resisting walls
  • Old intumescent sealant that has split away
  • Fire seals cut back for extra cables and never reinstated
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
Constructionline member
£5m PL insurance

Fire stopping near Rowner

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Doing it in-house

Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

Fire stopping in Rowner, done properly

Facilities managers in Rowner often find open service penetrations when ceilings come down for other work. Where the walls and floors already have a fire-stopping specification, we can work to it using the product and detail it sets out. Where there isn’t one, the designer or fire engineer needs to set one first. We work on linear gaps at wall heads, cable penetrations and service gaps in risers, and the failures we’re asked to look at most are service penetrations left open after M&E works and hidden openings found during inspections. Whether you call it commercial sealant work, mastic application or joint sealing, in Rowner it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Converted and extended buildings around places like Rowner can mix old and new construction, so it’s worth confirming the wall or floor type before choosing the seal. We match the product to the substrate and service, and say so if a collar, wrap or batt is the specified item.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we’re clear about what is covered before work starts.

Place
Rowner (PO13, PO14)
Region
Hampshire
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

What sealant work can’t fix

Some faults sit outside our scope, and we point that out rather than sealing over them:

  • Walls or floors that aren’t fire-resisting to begin with
  • Issuing fire ratings or certificates for seals
  • Reviewing a building’s overall fire safety

Not sure which it is? You can give us a call on 01277 525 020 or email us and we’ll tell you honestly.

Joints and surfaces we work on

  • Pipe penetrations
  • Service gaps in risers
  • Linear gaps at wall heads
  • Cable penetrations
  • Joints between fire-resisting walls and floors
  • Small duct penetrations where the tested detail allows

Cost factors for service penetrations

What shapes the price:

  • Working within restricted access windows
  • How much there is to seal
  • Joint width, depth and condition
  • The site’s rules and procedures

Every site prices differently: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.

Before you send an enquiry

Good information means a firmer quote. When you get in touch, include:

  • How the joints are reached, and at what height
  • The postcode of the building
  • Your programme or deadline
  • Approximate linear metres or a joint schedule

Need a figure for a tender or a budget? We’ll quote against your scope and drawings that you can work with. For a chat about it beforehand, call 01277 525 020 or send photos by email.

Fire-rated sealing for Rowner buildings

Rowner lies roughly 66 miles out from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls, and the gaps need sealing with the specified product. In England, Approved Document B covers fire stopping of openings and penetrations. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail.

For an estates team at a campus like University of Portsmouth - North Zone, which lies south-east of Rowner, summer M&E works are typically followed by a round of penetration sealing. For a unit at a site such as Brockhurst Gate Retail Park, 0.9 miles to the south-east of Rowner, any new service through a fire-resisting wall should be sealed to the tested detail.

Rowner is about 2 miles north-west of Gosport, in Hampshire. We send applicators to Rowner for service penetrations, handled exactly as we handle every other area. We work across 723 places in Hampshire, large and small.

We take on service penetrations across the PO13 and PO14 postcode area, whatever the building. Streets here include Wych Lane, Camp Road and Keyes Road, and sites on any of them can send details for a fixed quote. Just outside Rowner, we also work in Bridgemary (1 mile south-east), Peel Common (1 mile west), Crofton (1 mile west), Elson (1 mile south-east) and Lee-on-the-Solent (2 miles south-west). Bigger towns within reach include Havant (9 miles east), Eastleigh (12 miles north-west), Horndean (9 miles north-east), Chandler's Ford (15 miles north-west), Hedge End (9 miles north-west) and Waterlooville (8 miles north-east).

Near you in Rowner

In Rowner, that means premises near Holbrook Primary School, The Green Dragon pub and Baycroft School. The closest station to Rowner is Fareham station, about 2.3 miles north of the centre. Well-known places in the area include Gosport War Memorial Hospital (2.3 miles south-east) and Portchester Castle (2.9 miles east). Not far away are West of the River Alver and Portsdown Hill.

Map of Rowner © OpenStreetMap contributors

When to call us in Rowner

Head-of-wall joints and wall-to-wall junctions are frequent weak points. Movement in the frame or slab can open the joint, and a product not tested for that movement may crack. Linear joint details set a width range and movement capability, and the seal has to sit within them.

Look out for the following:

  • Hidden openings found during inspections
  • Fire-rated sealant that has cracked or shrunk back
  • Damaged fire seals in risers and voids
  • Snag lists that include open service penetrations

For a building such as St Matthew's, new heating or data runs are the usual reason penetrations need sealing.

Questions to ask before you book

  • Are they CHAS accredited or on Constructionline?
  • Do they follow the manufacturer’s priming guidance?
  • How long is the guarantee, and what does it include?
  • Will CSCS-carded applicators be on site?

How to choose a sealant contractor

On site: what to expect

Before any cutting starts, the area is protected: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work normally takes a single visit for a short list of penetrations, or a phased programme for a whole building, and we clear our waste as we work. Several jobs near Rowner can be grouped on one trip. Tell us your site hours and we’ll plan around them.

  1. We ask for the product and detail your designer has specified.
  2. We sort the openings by the detail each one needs.
  3. Improvised fillers and failed sealant are removed.
  4. Where the detail needs backing, it goes in at the stated depth.
  5. We gun the sealant in to the specified depth around each service and tool it.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

Preparing the site

  • Tell us your opening times and when work is allowed
  • Send asbestos survey details if the building is pre-2000
  • Let building users know which areas are affected

Ask for a quote

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we’ll arrange a site visit if anything is unclear.

Get a price

Read more

Maintenance after handover

A few simple habits keep the new joints working:

  • File the specified details where the next contractor can find them
  • Check with the data sheet before painting over fire sealant
  • Look above ceilings when tiles are lifted for other jobs
  • Arrange inspection before areas are covered up

Don’t patch a fire-rated seal with anything outside its tested detail. A repair should use the original product, installed the same way unless the designer specifies otherwise.

On fit-outs, get the fire-stopping specification agreed before the services go in. Details can then be picked to suit the actual pipes, cables and ducts.

Questions we’re asked in Rowner

Is hospital work, at somewhere like Gosport War Memorial Hospital, something you do?

Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.

Can you work at a site such as Brockhurst Gate Retail Park, by Rowner?

Yes. Our area takes in Rowner and its surroundings, with estates and business parks such as Brockhurst Gate Retail Park included. A few photographs and the unit address let us price the work.

Does the weather affect the 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.

When is resealing likely to be due?

There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.

How much does the work cost?

We don’t publish prices, as every site differs. Send photos or drawings and we will price it at a fixed figure.

Is the BS 476 change in 2029 relevant to fire stopping?

In England, references to the older BS 476 national classes are being removed from Approved Document B from 2 September 2029, with transitional arrangements set by the Government. The European route, BS EN 13501-2, then applies. Product selection stays with your designer.

Is Rowner in your area?

Yes. Sites across Rowner are covered, and the same phone number covers every area.

Accreditations

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