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

Fire-rated sealing and fire stopping in Cowplain, Hampshire

Looking for fire stopping in Cowplain? It’s simple: send details, get a quote, we seal, guaranteed.

  • Fire-rated sealant that has cracked or shrunk back
  • Fire seals cut back for extra cables and never reinstated
  • Unsealed penetrations discovered above suspended ceilings
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
Constructionline member
£5m public liability

Fire stopping in Cowplain

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

How we handle fire stopping in Cowplain

Fire-rated sealant suits many small service penetrations: copper and steel pipes, cables and some small ducts where the tested detail allows. Larger openings and some plastic pipes call for collars, wraps, batts or boards instead. We use sealant where it is the specified product, and we tell you when a detail calls for something else. Most enquiries involve unsealed joints where partitions meet the slab and fire sealant pulled out of the opening, on pipe penetrations, joints between fire-resisting walls and floors and small duct penetrations where the tested detail allows. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Cowplain, that means joint design, primers and backing rod as standard.

Fire-rated sealing in a place like Cowplain is typically a single building at a time. With the specification and photographs of the gaps, we can give a fixed quote and bring the right products.

What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Cowplain (PO8, PO7)
Wider area
Hampshire
Cover
A 12-month guarantee
Quotes
Fixed quote, scope in writing
Call
01277 525 020
Page updated
3 November 2026

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.

Drylining partitions

Plasterboard partitions are tested as a specific construction. The sealant detail has to be tested in that wall type, with the stated board layers.

Your questions answered

Can work in a care setting near Cowplain go ahead while residents are there?

Yes, with the manager deciding the order and timing of rooms. We follow the home’s own procedures throughout.

How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Cowplain?

From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

Do you work to architects’ specifications?

Yes. Send it with your enquiry, and the quote will be based on it.

Is Cowplain in your area?

Yes. We cover Cowplain, and you can call the office on 01277 525 020 or send details through our quote form to get started.

Is it fine to apply new sealant on top of old?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

Which sealant will you use?

The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

What do you charge?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote.

Keeping the joints sound

For the best life from the joints:

  • Treat an open penetration as a priority repair
  • Record which product was used where
  • Settle who seals which penetrations at the start of a project
  • Arrange inspection before areas are covered up

Store the specified product details somewhere the next contractor can find them. Anyone resealing later needs to know which product and detail were used.

Make reporting new openings part of every permit to work in service areas. It costs little and catches breaches early.

What sealant work can’t fix

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

  • Reviewing a building’s overall fire safety
  • Issuing fire ratings or certificates for seals
  • Large openings beyond what any sealant detail covers

If in doubt, call 01277 525 020 or email the details over and we will say what we think.

What we seal

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

How a job runs

We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. Several jobs near Cowplain can be grouped on one trip. Tell us your site hours and we will plan around them.

  1. First we confirm the product and tested details named in the specification.
  2. Openings are measured and grouped by detail.
  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

  • Send asbestos survey details if the building is pre-2000
  • Point out any areas we must not close
  • Tell us your opening times and when work is allowed

Get a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Ask for a quote

Advice

Cost factors for service penetrations

Sealant work doesn’t have a standard rate, because every site is different. What we take into account:

  • Phasing around occupants
  • Joint width, depth and condition
  • How much existing material needs removing
  • 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 you will have a fixed figure to work with.

Before you send an enquiry

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

  • Whether the building will be occupied during the work
  • Anything awkward about access or site hours
  • Approximate linear metres or a joint schedule
  • Whether an asbestos survey exists

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, give us a call on 01277 525 020 or email drawings and photos.

What we are called out for in Cowplain

Mixing products or improvising a detail breaks the link with the test evidence. Gaps beyond the tested size, shallow sealant, no backing where it was needed, or products from different systems mixed together are what we find most often.

Look out for the following:

  • Seals disturbed by maintenance and left open
  • Old intumescent sealant that has split away
  • Builders’ foam or ordinary silicone in compartment walls
  • Improvised or mixed-product fire seals

Theatres, wards and plant rooms at sites like Havant War Memorial Hospital, 3.5 miles to the south-east of Cowplain, all have compartment walls crossed by services.

What to look for in a quote

  • The terms of the workmanship guarantee
  • Whether old or failed sealant will be cut out, not overlaid
  • Health and safety accreditation such as CHAS
  • What site paperwork they can supply

Our contractor checklist

Fire-rated sealing for Cowplain buildings

There are three care or nursing homes within about 2 miles of Cowplain. In a care home, any new pipe or cable through a fire-resisting wall should be sealed to the specified detail. We install fire-rated sealant to the tested detail where it is specified. Fire stopping of openings and penetrations in England falls under Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail.

Older community buildings such as The Hart Plain Church that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Industrial units on estates such as Westfield Industrial Estate (1.6 miles north-east of Cowplain) often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal.

Cowplain is about 1 mile south-west of Horndean, in Hampshire. Across the PO8 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Across Hampshire, 723 places are covered, Cowplain among them. Portsmouth is covered too, some 7 miles away.

If you need fire stopping in PO8 and PO7, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. We cover commercial and managed buildings on Milton Road, King's Road and London Road. Nearby places we also cover include Hart Plain (1 mile south-west), Waterlooville (1 mile south), Soake (1 mile west), Furzeley Corner (2 miles west) and Purbrook (2 miles south) for service penetrations. Further afield, our area takes in Gosport (9 miles south-west), Havant (3 miles south-east), Eastleigh (15 miles west), Fareham (8 miles south-west), Hedge End (12 miles west) and Petersfield (8 miles north-east).

What’s near Cowplain

In Cowplain, that means premises near The Cowplain School, among other places. The nearest railway station is Rowlands Castle station, about 3 miles east. Well-known places in the area include Havant Museum (3.9 miles south-east) and Havant War Memorial Hospital (3.5 miles south-east). Open spaces near Cowplain include Windmill Hill and Southmoor Nature Reserve.

Map of Cowplain © OpenStreetMap contributors
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