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

Fire-rated sealing and fire stopping in Elson, Hampshire

Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Elson and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Openings left by services added after handover
  • Penetration schedules that need working through
  • Seals that don’t match their tested detail
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
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
CHAS accredited
Fully insured: £5m PL

Fire stopping for Elson sites

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

When it isn’t the sealant

Being straight saves everyone time. Fresh joints won’t solve:

  • Approving the work on behalf of building control
  • Fire doors, dampers or other fire safety equipment
  • Walls or floors that aren’t fire-resisting to begin with

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

Joints and surfaces we work on

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

How we handle fire stopping in Elson

Sealant is the specified answer for plenty of openings, such as metal pipes, cables and some small ducts where the detail covers them. 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. Site teams most often ask us about fire-rated sealant that has cracked or shrunk back and hidden openings found during inspections, across linear gaps at wall heads, cable penetrations and joints between fire-resisting walls and floors. Facilities teams, main contractors and managing agents in Elson tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Buildings in a smaller place such as Elson that need fire-rated sealing are typically schools, care homes, surgeries, small offices and flats over shops. Specified fire-rated sealant goes around new services there, built to match the manufacturer’s detail.

What our 12-month guarantee covers is the way we did the job: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Place
Elson (PO12, PO13)
Wider area
Hampshire
Guarantee
12 months on every job
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Why deal with it now?

An unsealed opening affects more than fire safety: smoke, noise and draughts pass through them every day. Sealing them to the specified detail deals with the fire risk first, and the other benefits follow. For buildings in places like Elson, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.

Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

Why us?

  • Joints cleaned back to sound surfaces
  • Fully insured
  • One phone line for London, the South East and Scotland
  • Workmanship guaranteed for 12 months

See how commercial sealant jobs are priced or our accreditations and insurance.

What affects the price in Elson

A fixed quote reflects the actual work. It allows for:

  • How much existing material needs removing
  • Access and working height
  • Whether the work must be split into stages
  • Induction, permit and paperwork requirements

There’s no price list, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.

Sending details for a quote

A few photos plus some basic facts will normally do. Please tell us:

  • A wide shot and a close-up of the area
  • Specification clauses that apply
  • The site address and postcode
  • Asbestos survey details if the building is older

Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. If you have questions first, phone 01277 525 020 or email drawings and photos.

Our process

Occupied buildings need a little choreography. The work area is signed and kept contained, with routes through the building left open and move on in phases so staff and visitors can carry on around us. For a job in Elson, the main thing is a clear picture of the work. A fixed quote follows.

  1. We read the specification, drawings or penetration schedule you send and raise any questions before we price.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  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. Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

What we need from you

  • Confirm the product named in the specification
  • Make sure the joints can be reached
  • Point out any areas we must not close

Getting a fixed quote

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.

Get a price

Related advice

When to call us in Elson

Damage plays a part too. Seals get knocked during maintenance, cut back to add a cable or pulled out when services are swapped and the opening isn’t always resealed.

It’s worth sending us details if you spot any of the following:

  • Improvised or mixed-product fire seals
  • Fire sealant pulled out of the opening
  • Builders’ foam or ordinary silicone in compartment walls
  • Penetration schedules that need working through

Large healthcare estates like Gosport War Memorial Hospital, 1.4 miles south of Elson, change their services often, so penetration seals are worth checking after M&E work.

What your quote should include

  • How the joint faces will be prepared and primed
  • Will RAMS and insurance details be available?
  • Are they CHAS accredited or on Constructionline?
  • How the existing material will be dealt with

How to choose a sealant contractor

Elson: questions and answers

What happens to BS 476 references for fire stopping in Elson?

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

Can you seal penetrations in a hotel in Elson after a refit?

Yes. We install fire-rated and intumescent sealant where it is specified. It goes in to the manufacturer’s tested detail for the wall or floor and the services passing through, and we will tell you if the detail calls for a collar, wrap or batt instead.

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

No, never. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.

What if there’s asbestos in the old mastic?

Managing asbestos is the dutyholder’s responsibility, so we will ask for the register before work on an older building. Work pauses if suspect material is found, until it has been tested.

What’s the quickest route to a quote?

It works in four steps: send details, get a quote, we seal, guaranteed. Step one needs little more than photographs and a postcode.

Do you need to see the site first?

Many jobs can be quoted from photographs, drawings or a joint schedule. Where they aren’t, we arrange a site visit.

Can you work to our specification?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and we raise anything unclear before work begins.

After the work

Once the work is signed off, a little attention goes a long way:

  • Foam or ordinary sealant is never a fire-seal repair
  • Get seals inspected before ceilings and boxing close
  • Keep product data and details in the fire safety file
  • Agree the fire-stopping specification before services go in

After the work, brief anyone else working in the area that the openings are now sealed. If a seal has to be opened for a new service, it should be reinstated to the same detail using the same product.

The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. That way the opening is sealed while the trade and access are still there instead of being left for someone else.

Compartments and services around Elson

Elson is about 66 miles from central London. Office refits around the commuter belt bring new cabling through fire-resisting walls, and the gaps need sealing with the specified product. In England, Approved Document B covers fire stopping of openings and penetrations. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail.

Shop fits on retail sites such as Brockhurst Gate Retail Park, 0.5 miles to the north-west of Elson, can bring new services through fire-resisting walls between units, to be sealed with the specified product. For an estates team at a campus like University of Portsmouth - North Zone, which lies south-east of Elson, summer M&E works are typically followed by a round of penetration sealing.

Elson is about 1 mile north of Gosport, in Hampshire. Any commercial site in Elson is covered, for single jobs and planned programmes alike. 723 places across Hampshire fall within our area, Elson among them.

Business premises anywhere in PO12 and PO13 are within our area for service penetrations. For a building on Ham Lane, Quay Lane and Avery Lane or nearby, send details and we’ll quote for service penetrations. With the A32 nearby, Elson is straightforward for us to reach. Just outside Elson, we also work in Gosport (1 mile south), Forton (1 mile south), Bridgemary (1 mile north-west), Priddy's Hard (1 mile south-east) and Rowner (1 mile north-west). A short drive away, we cover Havant (8 miles north-east), Eastleigh (14 miles north-west), Fareham (3 miles north-west), Horndean (9 miles north-east), Hedge End (10 miles north-west) and Waterlooville (7 miles north-east).

Around Elson

In Elson, that means premises near The Kings Head pub, St Vincent College and Brune Park Community School and the streets around them. Elson’s nearest station is Portsmouth Harbour station, about 2.1 miles south-east of the centre. Nearby you will also find Search (1.6 miles south-east) and Portchester Castle (2.2 miles north-east). Open spaces near Elson include West of the River Alver and Portsdown Hill.

Map of Elson © OpenStreetMap contributors
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