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

Fire Stopping in Clayhall

Fire-rated and intumescent sealing of service penetrations and linear gaps in Clayhall. CHAS accredited and fully insured, with a 12-month guarantee.

  • Snag lists that include open service penetrations
  • Seals disturbed by maintenance and left open
  • Hidden openings found during inspections
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Fire stopping in Clayhall

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Fire stopping in Clayhall

It helps to set out our role at the start. The designer, fire engineer or building control decides which fire stopping is required. We fit the specified fire-rated sealant following that specification and the maker’s installation guidance on buildings around Clayhall. If you are dealing with openings found when ceilings come down for a refit and old intumescent sealant that has split away, we can help, whatever the surface. One point of contact handles commercial sealant work in Clayhall from the first photographs to the final walk-round, whether it’s one building or several.

Around Clayhall, penetration and linear seals tend to be one-building jobs. Send the specification, drawings or photographs of the openings and we’ll quote to suit.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

Location
Clayhall (PO12)
Region
Hampshire
Cover
A 12-month guarantee
Price
Fixed quote, scope in writing
Phone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Common problems we fix in Clayhall

Physical damage is another reason seals stop doing their job. Maintenance work can knock a seal, cut it back for an extra cable or remove it with an old pipe, and the repair is often skipped.

Any of the following is a good reason to get the joints checked over:

  • Damaged fire seals in risers and voids
  • Fire sealant pulled out of the opening
  • Non-fire-rated filler around services
  • Penetration schedules that need working through

For a site team at a college like St Vincent College (1.3 miles north of Clayhall), fire-rated sealing is best scheduled after the summer works.

What your quote should include

  • Whether old or failed sealant will be cut out, not overlaid
  • How they’ll work around occupants
  • What level of public liability insurance do they hold?
  • The named product and why it was chosen

Choosing a commercial sealant contractor

What the job involves on each surface

Masonry and concrete

Openings through concrete vary from tidy cores to rough break-outs. Each gap is measured where it is widest against the detail’s limits, and any outside it are raised with you.

Small ducts

Some fire-rated sealant details cover small ducts. Larger or fire-rated ductwork typically needs a different solution set by the designer, and we will say if that applies.

What happens if it’s left?

Open penetrations multiply: each new service adds to the list. Keeping on top of it after each round of works keeps the job small, rather than turning into a full building survey and reseal. In a smaller place such as Clayhall, getting a contractor back for a second visit takes time, so we’d suggest renewing all the joints that are going, not just the worst.

There’s no price list, since every building and every scope is different. Call for a quote and we will price your job on its own details.

Why clients in Clayhall choose us

  • One number for every site we cover
  • Joints cleaned back to sound surfaces
  • CHAS accredited
  • Work carried out by CSCS-carded applicators

Take a look at what affects the cost or our accreditations and insurance.

Commercial clients in Clayhall

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 will confirm them with the quote.

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Clayhall can form part of a wider programme across Hampshire.

Fire stopping in Clayhall: the local picture

Fire stopping of openings and penetrations in England falls under 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. Either way, we install the specified product to its tested detail. There are six care or nursing homes within about 2 miles of Clayhall. Where new services have gone through compartment walls in a care setting, the gaps need the specified product.

Tenant changes at parks like QinetiQ Haslar Marine Technology Park, less than half a mile north-east of Clayhall, bring new data and services, and openings through fire-resisting walls need the specified seal. At a healthcare site like Gosport War Memorial Hospital (1 mile north-west of Clayhall), new services through compartment walls are a constant, and each needs the specified seal.

Clayhall is about 2 miles south-east of Gosport, in Hampshire. We cover commercial sites throughout Clayhall. Clayhall is one of 723 places we cover in Hampshire.

We cover the PO12 postcode districts for service penetrations. For a building on The Lane, Old Road and Fort Road or nearby, we can quote for service penetrations. Nearby places we also cover include Haslar (1 mile south-east), Alverstoke (1 mile west), Portsmouth Point (1 mile north-east), Privett (1 mile north-west) and Portsea (2 miles north-east). Further afield, our area takes in Havant (8 miles north-east), Fareham (6 miles north-west), Horndean (10 miles north-east), Hedge End (12 miles north-west), Waterlooville (8 miles north-east) and Purbrook (7 miles north-east).

Near you in Clayhall

We work on buildings around Bay House School, The Fighting Cocks pub and St Vincent College, among other places. The closest station to Clayhall is Portsmouth Harbour station, about 1.4 miles north-east. Nearby you’ll also find Gosport War Memorial Hospital (1 mile north-west) and Search (0.9 miles north). The countryside around Clayhall includes West of the River Alver.

Map of Clayhall © OpenStreetMap contributors

Your questions answered

What does the BS 476 change mean for fire-rated sealant in Clayhall?

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.

Will you take on work at estates like QinetiQ Haslar Marine Technology Park, close to Clayhall?

Yes. We cover Clayhall and the area around it, including industrial estates, business parks and retail parks such as QinetiQ Haslar Marine Technology Park. To start, just give us a call on 01277 525 020 or send details through our quote form with the unit, the joints involved and your access times.

Can you quote from photos?

That depends on the size and complexity of the job. Straightforward work can often be priced from photographs and measurements, and bigger or more complex jobs usually get a visit.

Is the work guaranteed?

Yes. It runs for twelve months and covers how we prepared and sealed the joints, but not damage, misuse or other trades’ work.

How do you choose the sealant?

A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

How soon can the area be used again?

Curing time varies by product, and we confirm it on the day, and sign any area that should be left alone.

What hours do you work?

Give us your site hours and any access windows in your enquiry, and we’ll plan around them. You can reach the office between 8am and 5pm, Monday to Friday.

What affects the price in Clayhall

Your fixed quote is built from the real scope. It allows for:

  • Induction, permit and paperwork requirements
  • How much there is to seal
  • The size and state of each joint
  • Whether old sealant has to be cut out first

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.

Details that help us quote

Whether it’s one area or a whole building, the same details help:

  • Asbestos survey details if the building is older
  • Access details, including height
  • A wide shot and a close-up of the area
  • Any dates the work must fit around

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.

From enquiry to sign-off

Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and the job ends with a walk round and sign-off. If neighbouring businesses or buildings around Clayhall need work too, visits can be combined. Tell us your site hours and we will plan around them.

  1. First we go through the drawings, schedule or specification for the seals.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  3. Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
  4. Mineral wool or other backing goes in wherever the detail asks.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Getting the site ready

  • Move anything stored against the joints
  • Flag any permit to work we’ll need
  • Send asbestos survey details if the building is pre-2000

Get a fixed quote

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. The easiest way is to call 01277 525 020 or email us.

Ask for a quote

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Accreditations

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