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

Fire-rated sealing and fire stopping in Rudmore, Portsmouth

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

  • Fire sealant pulled out of the opening
  • Damaged fire seals in risers and voids
  • Builders’ foam or ordinary silicone in compartment walls
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Fire stopping across Rudmore

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

When it isn’t the sealant

Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be any of the following:

  • Plastic pipes whose detail calls for a collar or wrap
  • Writing the fire-stopping specification
  • Signing off or certifying a building’s fire stopping

Not sure which it is? You can phone 01277 525 020 or email us and we’ll tell you honestly before you book.

Where we work in Rudmore

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

Fire stopping for commercial buildings in Rudmore

A fire-rated sealant is only one part of a tested system: the evidence covers a specific product, wall or floor type, service, gap, depth and backing. Before we seal anything, we check the opening against the detail it is meant to follow, and raise it with you if it falls outside. If you have head-of-wall gaps with no fire seal and old intumescent sealant that has split away, we can help. Most enquiries from Rudmore start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.

In places the size of Rudmore, fire-resisting walls and floors are found in schools, care homes, health centres and mixed-use buildings. 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: 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
Where
Rudmore (PO2, PO1)
Region
Portsmouth
Guarantee
12 months on every job
Quotes
A fixed quote before we start
Phone
01277 525 020
Last updated
3 November 2026

Your questions answered

Do you seal service penetrations in hotels around Rudmore?

Yes, where fire-rated sealant is the specified product. Each seal follows the tested detail, and rooms are done in turn.

Is Rudmore off your patch?

No. Places such as Rudmore are covered as much as the big towns. We work across Greater London and the South East. We plan jobs in smaller places so return trips are kept to a minimum.

Is your workmanship covered by a guarantee?

Yes, for 12 months. If our installation fails in that time, we return and fix it.

How do you choose the sealant?

A specification, where there is one, decides it. 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.

Is any job too small?

Small jobs are welcome alongside larger packages. Send details for a fixed quote.

Can you work while the building is occupied?

Yes, with some planning. We agree a sequence with your contact so just one area at a time is disrupted.

Do you hold CHAS accreditation?

Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

How the job changes by surface

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables and we work within those limits.

Small ducts

Ducts are only sealed with sealant where the detail allows it. The ductwork, its supports and any dampers are for the ductwork contractor.

For managing agents and facilities managers

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.

Fire-rated sealing for Rudmore buildings

At about 64 miles from central London, Rudmore is within reach of the capital. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls; the gaps need the specified seal. The 2 miles around Rudmore include two care or nursing homes. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal. We install fire-rated sealant to the tested detail where it is specified.

At a retail site such as Victory Retail Park, 0.5 miles to the south-west of Rudmore, walls between units may be fire-resisting, so services added in a refit need the specified seal. For a hotel such as The Avenue Hotel, 0.6 miles north of Rudmore, penetration seals are worth checking after any refit or services upgrade. Colleges such as Portsmouth College (1.7 miles east of Rudmore) add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product.

Rudmore is about 1 mile north-west of Portsmouth, in Portsmouth. We cover commercial sites throughout Rudmore, for single jobs and planned programmes alike. Rudmore is one of 19 places we cover in Portsmouth for service penetrations.

Business premises anywhere in PO2 and PO1 are within our area for service penetrations. Streets here include Knox Road, Wharf Road and Croft Road. Being close to the M275 and A2047, Rudmore is straightforward for us to reach. We also cover North End (1 mile north-east), Tipner (1 mile north-west), Portsmouth (1 mile south-east), Landport (1 mile south) and Copnor (1 mile east).

What’s near Rudmore

Locally, jobs take us to sites close to Alexandra Park, The Admiral Drake pub and Mayfield School and the streets around them. The nearest railway station is Portsmouth & Southsea station, roughly 1.1 miles south of the centre. Other landmarks nearby include Tricorn Centre (0.8 miles south) and Portchester Castle (2.1 miles north-west). The countryside around Rudmore includes Milton Locks and Portsdown Hill.

Map of Rudmore © OpenStreetMap contributors

Leave it or put it right?

The longer openings stay, the more there tend to be: every new cable or pipe adds another. A schedule that is dealt with regularly stays manageable and avoids a much larger catch-up later. Over time, UV, weather and movement wear any sealant out. Renewing it in good time keeps the building weathertight.

The price depends on the quantity of joints, what has to come out first and how the joints are reached. Call for a quote when you are ready.

What you get with us

  • Work carried out by CSCS-carded applicators
  • Constructionline member
  • Workmanship guaranteed for 12 months
  • Clear, fixed quotes

See our cost guide and our accreditations and insurance.

After the work

Once the work is signed off, these steps help:

  • Brief every trade that openings they make must be sealed
  • File the specified details where the next contractor can find them
  • Arrange inspection before areas are covered up
  • Look above ceilings when tiles are lifted for other jobs

New services after handover are a common way fire stopping gets breached. A short check at the end of each job saves a long hunt later.

Regular walk-rounds of service areas are worth the time. A cracked or disturbed seal found early is a small job; found late, it can be one of many.

Diagnose, treat, sign off

A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. The work itself typically 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. Work in places the size of Rudmore is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.

  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. Unsuitable fillers and loose debris are taken out of each opening.
  4. We fit the backing the detail asks for, to the stated depth.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

Before we start on site

  • Tell us which areas need to stay in use
  • Tell us your opening times and when work is allowed
  • Point out parking and an unloading spot

Quotes

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.

Get a price

Related advice

Accreditations

Trusted. Accredited. Insured.