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

Fisher fire stopping

Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Fisher and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Fire seals cut back for extra cables and never reinstated
  • Unsealed openings around new pipes and cables
  • Old intumescent sealant that has split away
1
Send details
Tell us about the site, with photos if you have them.
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
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Fire stopping in Fisher

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

Fire stopping in Fisher

Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4 and the results are classified to BS EN 13501-2. A rating such as EI 60 only holds when the product is installed as it was tested. So our job is to reproduce that arrangement faithfully. We work on small duct penetrations where the tested detail allows, pipe penetrations and linear gaps at wall heads, and the usual reasons a site gets in touch are service penetrations left open after M&E works and fire-stopping items raised at inspection or handover. Facilities teams, main contractors and managing agents in Fisher tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Rural conversions around Fisher can put new fire-resisting partitions inside older structures. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.

A 12-month guarantee applies to all our work in West Sussex. If an installation problem shows up, call the office on 01277 525 020 or email us and we will arrange a return visit.

Where
Fisher (PO20)
Region
West Sussex
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Phone
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Diagnose, treat, sign off

A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. The work itself normally takes anything from one day to a planned run of visits, depending on the number of seals and the access, and our waste is bagged and taken away as we go. For work around Fisher, we aim to finish in one visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.

  1. The specification and schedule come first, so we know which details apply.
  2. Access, permits and the order of areas are agreed with the site team.
  3. We compare every service penetration with its tested detail before sealing.
  4. Foam, ordinary sealant and debris come out first.
  5. The specified backing and sealant go in to depth and are finished neatly.
  6. We tell you about openings that need a different product.

Preparing the site

  • Send any specification or drawings in advance
  • Agree which areas must stay open
  • Clear stock, furniture or equipment away from the joints

Quotes

Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. For a chat about it beforehand, speak to us on 01277 525 020 or use the quote form.

Ask for a quote

Read more

Surface by surface

Cables and cable bundles

New data and power cables are the most common breach we see. We reseal around them to the specified detail, and any bundle too large for sealant alone is flagged.

Drylining partitions

Drylined fire walls are tested in a particular build-up. The sealant detail has to be tested in that wall type, with the stated board layers first.

For managing agents and facilities managers

We work for building owners and managing agents on everything from one building to a spread of sites around Fisher. One quote can cover more than one site, which keeps the paperwork simple.

Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so the building keeps working while we do.

Service penetrations in Fisher buildings

For England, the fire stopping of penetrations is dealt with in Approved Document B. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. At about 56 miles from central London, Fisher is within reach of the capital. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal.

Halls and meeting rooms at places like St Leodegar's Church sometimes gain new services, and any compartment wall crossed needs the specified seal. At a healthcare site like St Richard's Hospital (3.2 miles north of Fisher), new services through compartment walls are a constant, and each needs the specified seal.

Fisher is about 3 miles south of Chichester, in West Sussex. We cover commercial sites throughout Fisher, whether it’s a single job or part of a planned programme. Across West Sussex, 373 places are covered, Fisher among them. Portsmouth is covered too, some 14 miles away.

Business premises anywhere in PO20 are within our area. Close to Fisher, our area also takes in South Mundham (1 mile east), Street End (1 mile south-west), Sidlesham Common (1 mile west), Sidlesham (2 miles south-west) and Nyetimber (2 miles south-east). A short drive away, we cover Bognor Regis (3 miles east), Chichester (3 miles north), Selsey (5 miles south), Littlehampton (10 miles east), Rustington (11 miles east) and Angmering (13 miles east).

Local landmarks in Fisher

For rail, the closest station is Chichester station, about 2.5 miles north of the centre. A little further out are Chichester Cathedral Treasury (2.7 miles north) and Chichester Castle (3 miles north).

Map of Fisher © OpenStreetMap contributors

Your questions answered

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

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 plan work around the academic year at somewhere like University of Chichester?

Yes. Education sites normally want the work in vacations or in phases during term, and we plan to suit. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Do you seal on top of existing sealant?

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

When is resealing likely to be due?

It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.

Are your applicators CSCS-carded?

Yes. Should the site need card details in advance, let us know and we will send them with the quote.

How do we ask for a quote?

There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.

Will you come and look before quoting?

It depends on the job. Straightforward work can often be priced from photographs and measurements, while larger or less clear jobs get a site visit first.

General trades versus a specialist

Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

What we are called out for in Fisher

Mixing products or improvising a detail breaks the link with the test evidence. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are what we find most often.

Site and facilities staff are often the first to spot these:

  • Seals disturbed by maintenance and left open
  • Fire-rated sealant that has cracked or shrunk back
  • Fire stopping installed outside its tested range
  • Unsealed joints where partitions meet the slab

Residences at universities like University of Chichester (2.4 miles north-east of Fisher) have compartment walls that must be resealed whenever services change.

Comparing quotes

  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • What level of public liability insurance do they hold?
  • Their plan for phasing and protecting the area
  • Health and safety accreditation such as CHAS

Our contractor checklist

Keeping the joints sound

To get the most from the new sealant:

  • Treat an open penetration as a priority repair
  • Make fire stopping part of every scope that crosses a fire-resisting wall
  • File the specified details where the next contractor can find them
  • Don’t let anyone top up a fire seal with the wrong product

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.

Looking at service areas on a regular cycle pays off. Catching a damaged seal early keeps the fix small; found late, it can be one of many.

Accreditations

Trusted. Accredited. Insured.