Every pipe, cable tray and duct that passes through a compartment wall punches a hole in it. Fire stopping seals those holes with systems that have been fire-tested for that exact situation. Gemini AMPM installs fire stopping under FIRAS audit — every seal matched to a tested detail, labelled on site and logged in your handover pack.
Fire stopping is not one product. Intumescent collars and wraps close plastic pipes as they soften in a fire. Ablative-coated batts seal larger openings around cable trays and ductwork. Fire-rated sealants, compounds and pillows handle linear gaps, single services and risers that keep changing. Each system only performs in the configurations it was tested in — the right substrate, aperture size, service type and spacing.
So that is how we install: every penetration matched to a manufacturer’s tested detail, using systems from the likes of Rockwool, Promat, Hilti and 3M, fitted by trained installers whose work is independently audited under our FIRAS approval. Where no tested detail exists — and in older buildings that happens — we say so and propose an engineered judgement rather than improvising with mastic and hoping the paperwork never gets read.
Every seal we install gets a unique reference label, a photograph before and after, and a register entry recording the product, the tested detail and the installer. That register is not admin for its own sake — it is the evidence your responsible person, fire risk assessor and building control body will eventually ask for, and it drops straight into a golden-thread file.
We work in live buildings as standard: hospitals, schools, offices and data centres where the services stay energised and the occupants stay put. Works are sequenced with your M&E contractors so freshly sealed openings are not cut open a week later — and when they are, the label tells the next trade exactly what they just broke. Read about our work at Peterborough Court & Daniel House.
Fire stopping restores the fire resistance of a wall or floor where services pass through it, using systems fire-tested for that exact configuration — substrate, opening size, service type. General sealant just fills a hole. It may look identical when cured, which is exactly the problem: plenty of buildings have compartment walls full of decorator’s mastic. A fire-stopping installer works to the manufacturer’s tested detail and leaves evidence — labels, photographs, a register — that the seal will perform.
FIRAS is a third-party certification scheme for passive fire installers, run by Warringtonfire. It means our operatives are assessed for competence and our installed work is independently inspected on an ongoing basis — not self-certified. For you, that translates into evidence: certificates of conformity you can put in front of building control, insurers or the Building Safety Regulator. Under a regime built on demonstrable competence, who installed your fire stopping now matters as much as what was installed.
Yes — most of ours is. The work is localised, low-noise and sequenced area by area, so a hospital ward, school corridor or trading office can stay in use while we seal around it. We coordinate access with your facilities team, work around live services as standard, and leave each area labelled and photographed the same day. Out-of-hours slots are available where daytime access is genuinely impossible. What we will not do is rush a seal to suit a corridor booking.
A named engineer, not a call centre, comes back within 24 hours. Tell us the building and what you’re dealing with, and we’ll scope it properly.