Industrial Building: 4hr Fire-Rated Internal and External Envelope
Overview & Objectives
Ambrey Baker was appointed to construct the internal and external building fabric at a retail store, with the dual aim of improving hygiene and thermal performance while also delivering a fully fire-rated external envelope system.
Key objectives included:
Installing food-safe insulated walling internally to support hygiene compliance and internal climate control.
Upgrading the external envelope with fire-rated insulation to meet 4-hour fire resistance standards.
Scope of Work
Internal Walling
Supply and install insulated composite panels to internal wall areas, creating hygienic, easy-clean surfaces.
Line internal steelwork and masonry to improve insulation and airtightness.
All finishes applied to food-safe standards, suitable for chilled storage and back-of-house areas.
External Envelope (Fire-Rated)
Design and installation of a new external insulated panel system using composite panels.
Achieved 4-hour fire rating across the full envelope in accordance with fire safety compliance requirements.
Precision detailing around roller doors, personnel access points, and mechanical interfaces.
Access & Phasing
Works completed using MEWPs, scissor lifts, and mobile towers for safe access.




Outcomes
Ambrey Baker delivered a fast-track envelope and internal install that supports food safety, energy efficiency, and fire compliance for this live Sainsbury’s store. The result is a safe, thermally stable retail environment.
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