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Working on sites across the UK
MDI Fire & Construction

Fire Stopping & Penetration Sealing

Sealing pipes, cables and ducts that pass through fire-rated walls and floors to tested details.

Every time a pipe, cable, duct or cable tray passes through a fire-resisting wall or floor, it creates a potential route for fire and smoke. Fire stopping restores the fire resistance of that construction, so each compartment keeps doing its job.

Why it matters

Small, unsealed or badly sealed gaps can undermine an otherwise well-built compartment, letting fire, smoke and hot gases move between floors and rooms. Correctly installed fire stopping closes those routes and supports the building's overall fire strategy.

How we work

  • A detailed survey of service penetrations and linear gaps, including above ceilings, in risers and in plant areas.
  • Selecting tested, certified products for each penetration type and substrate, such as coated batts, sealants, collars, wraps and mortars.
  • Careful installation with attention to annular gaps, seal depths, edge details and movement.
  • Photographs, locations and product details recorded for every seal, with labelling where required.

New build, refurbishment and remedial works

Whether you are delivering a new building, refurbishing an existing one or acting on actions from a fire risk assessment, our teams provide practical, compliant fire stopping that fits around your programme and works alongside your other passive fire measures.

Need passive fire protection?

Book a free, no-obligation site survey with one of our specialists.

Call us Free survey