Defective fire stopping is the most common failure found in UK buildings. This guide covers inspection regimes, third-party certification, and ensuring compartmentation integrity.. The Fire Stopping Crisis Post Grenfell investigations revealed that defective fire stopping is the single most common fire safety deficiency in UK buildings. Studies suggest that up to 80% of fire stopping installations contain some form of defect. Why Fire Stopping Fails Installed by unqualified or untrained operatives Wrong products used for the application Products installed contrary to test evidence Subsequent trades damaging completed fire stopping No inspection or sign off regime during construction Lack of understanding of fire stopping principles Third Party Certification FIRAS (Fire Industry Registration and Assessment Scheme) The primary third party certification scheme for fire stopping contractors Administered by Warringtonfire (Element) Requires: trained operatives, quality management, regular audits Categories: passive fire protection, fire doors, fire stopping IFC Certification Independent certification body for fire stopping installers Requires demonstrated competence and ongoing assessment Provides independently verified installation records BRE Global / LPCB LPS 1531: Requirements for fire stopping contractors Third party certification of both products and installers Regular surveillance audits of certified companies Inspection Methodology Pre Construction 1. Fire stopping specification review — Ensure products specified match test evidence for each application 2. Penetration schedule — Document every penetration through fire rated elements 3. Method statements — Review installation methods against manufacturer data 4. Competence verification — Confirm installer certifications and training records During Construction 1. Hold points — Mandatory inspection before concealment 2. Photographic records — Every fire stopping installation photographed before and after 3. Material verification — Check products match specification (batch numbers, dates) 4. Installation quality — Depth of fill, annular gap, service compatibility Post Construction 1. Completion certificates — FIRAS or equivalent certificates for all installations 2. As built records — Updated penetration schedules with actual installations 3. Sample opening up — Random selection of concealed installations for verification 4. Remedial action — Clear process for defect rectification and re inspection Common Defects Found Service Penetrations Oversized openings — Annular gaps too large for the installed product Mixed services — Cables, pipes, and trays through a single opening (each requires separate treatment) Wrong product selection — Intumescent sealant used where a collar or wrap is required Insufficient depth — Fire stopping material not installed to full wall/floor thickness Construction Joints Missing fire stopping at steel to concrete joints Movement joints without fire rated treatment Curtain wall to slab junctions with gaps Cavity barriers missing or incorrectly positioned Retrospective Issues Additional services installed after fire stopping completed Mechanical damage from other trades Fire stopping removed and not replaced during maintenance Ageing products past their effective service life Building Safety Act Implications Under the BSA 2022 and the golden thread requirements: Fire stopping records must be maintained throughout building life Competent person sign off required for all fire stopping works Building Safety Manager must maintain fire stopping records Gateway process requires demonstrated fire stopping competence Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 (0) 20 3488 1926 ✉️ info@magnusopifex.co.uk Founded by Daniel Sheridan, Magnus Opifex SEVEN LTD delivers award winning fire engineering, fire risk assessments, and building safety consultancy across the United Kingdom and internationally.