Complex Building Fire Strategies provide the fire-safety rationale for buildings whose scale, layout, occupancy, structural form or operational use cannot be addressed adequately through standard prescriptive guidance alone.

Phronesis Fire Engineering develops clear, proportionate and technically robust strategies for complex new-build, refurbishment and change-of-use projects. We combine a detailed understanding of building design, occupant behaviour, fire dynamics and regulatory expectations to identify practical solutions that support both safety and design intent.

Our work may include:

• Fire-strategy development from concept through detailed design and construction.

• Assessment of non-standard or challenging building layouts, mixed-use developments and complex phased projects.

• Means-of-escape, travel-distance, evacuation and occupancy assessments.

• Fire-service access, facilities and firefighting-shaft strategy.

• Compartmentation, fire-resisting construction and external-wall considerations.

• Smoke-control, sprinkler, detection and alarm-system strategy.

• Structural fire-engineering input and performance-based analysis where appropriate.

• Support for Building Regulations approval, Building Safety Regulator gateways and stakeholder engagement.

• Review and coordination of fire-safety information across the design team.

We aim to make complex issues understandable and actionable: identifying the critical fire-safety risks early, setting out the assumptions that matter, and producing a coordinated strategy that can be implemented, reviewed and maintained throughout the building’s life.

For buildings with missing, conflicting or obsolete strategies, Phronesis Fire Engineering can assess and develop an In-Use Fire Strategy which sets out how a building’s fire-safety measures are intended to work. It brings together the building’s physical fire precautions, management arrangements and emergency procedures into a clear, practical framework for those responsible for operating, maintaining and altering the premises.

Phronesis Fire Engineering prepares proportionate, building-specific strategies for occupied and operational buildings, including complex, higher-risk and mixed-use premises. Our work helps dutyholders understand the original design intent, identify gaps created through change or incomplete information, and establish a defensible basis for ongoing fire-safety management.

Depending on the specific need, typical services may include:

• Reviewing existing fire-strategy information, fire-risk assessments, drawings and building records.

• Establishing or reconstructing the building’s intended fire-safety approach where original documentation is limited.

• Defining evacuation principles, including simultaneous, phased, progressive-horizontal or stay-put arrangements where applicable.

• Reviewing escape routes, compartmentation, fire doors, firefighting provisions and active fire-safety systems.

• Setting out expectations for inspection, testing, maintenance, impairment management and record keeping.

• Clarifying the responsibilities of the Responsible Person, accountable persons, facilities teams, managing agents, occupiers and other dutyholders.

• Addressing the operational implications of refurbishment, tenant fit-out, changes of use and temporary works.

• Supporting safety-case information and ongoing compliance for higher-risk buildings.

The result is a concise, usable document that explains what the building’s fire-safety measures are for, how they should be managed, and what must not be compromised as the building evolves.

Phronesis Fire Engineering provides specialist fire-engineering input to the preparation, review and ongoing maintenance of Building Safety Case Reports for occupied higher-risk buildings in England.

We can help ensure that the active and passive fire safety features can, along with appropriate fire safety management provisions, clearly document in a clear, proportionate and traceable form how the various elements demonstrably provides occupants with an appropriate level of fire safety.

We work with Principal Accountable Persons, Accountable Persons, managing agents, resident-management companies and wider consultant teams to turn varied building records, surveys, inspections and operational information into a coherent technical narrative.

Our Technical Support

Our services may include:

• Reviewing available fire strategies, as-built information, fire-risk assessments, façade records, compartmentation surveys, fire-door inspections and maintenance documentation.

• Establishing the building’s fire-safety design intent and assessing how this relates to its present condition, use, occupancy and management.

• Identifying credible fire-spread scenarios, including internal fire and smoke spread, external fire spread and the performance of critical fire-safety measures.

• Reviewing escape arrangements, evacuation strategy, smoke control, detection and alarm systems, suppression systems, fire-service access and firefighting facilities.

• Assessing the significance of known defects, uncertainties, incomplete records and competing technical opinions.

• Defining proportionate further investigations, evidence-gathering exercises and risk-control measures where information is inadequate.

• Supporting the technical content of risk assessments, action plans, remediation priorities and ongoing monitoring arrangements.

• Preparing or reviewing fire-safety sections, technical schedules and appendices for inclusion within the Safety Case Report.

Clear and Defensible Evidence

A strong report should do more than list documents or repeat inspection findings. It should explain how the available evidence supports the conclusion that building-safety risks are being identified, assessed and managed, while being candid about material limitations and the measures in place to control them.

The wider information regime also requires prescribed building information to be maintained, including details relevant to escape routes, fire doors and fire- and smoke-control equipment. We help clients create a clear connection between that live technical information, the building’s management arrangements and the conclusions set out in the Safety Case Report.

A Proportionate Approach

Every building has a different history, evidence base and risk profile. Phronesis Fire Engineering focuses on the issues that are material to the building’s fire safety, avoiding both unsupported assurance and unnecessary complexity.

The outcome is practical technical input that supports informed decision-making, prioritised investment and a well-evidenced Safety Case Report for the Building Safety Regulator.

Safety Case Technical Assurance provides independent, specialist scrutiny of the fire-safety evidence that supports a higher-risk building’s safety case. It helps Principal Accountable Persons, Accountable Persons and their advisers establish whether the available information provides a clear, credible and proportionate demonstration that building-safety risks are understood and being managed.

For occupied higher-risk residential buildings in England, the safety case report must describe identified building-safety risk scenarios, their likelihood and consequences, the steps taken to manage those risks, arrangements for testing and maintenance, management of building works, and emergency plans.

Phronesis Fire Engineering provides focused fire-engineering assurance to help clients assemble, interrogate and strengthen the technical fire-safety component of this evidence. We take a risk-led approach: reviewing what is known, identifying material uncertainties and gaps, and setting out realistic, prioritised actions where further investigation, remediation or management controls are needed.

Our services may include:

• Independent technical review of fire-safety information supporting a safety case and safety case report.

• Review of existing fire strategies, fire-risk assessments, façade and compartmentation information, inspection records, drawings and maintenance documentation.

• Identification and assessment of credible fire scenarios that could lead to a major incident.

• Evaluation of passive and active fire-safety measures, including compartmentation, fire doors, escape arrangements, smoke control, alarms, sprinklers and firefighting provisions.

• Assessment of the relationship between the building’s original fire-safety design intent and its present condition, use and management arrangements.

• Definition of proportionate investigation scopes where evidence is incomplete, unreliable or conflicting.

• Clear articulation of assumptions, limitations, risk controls and residual risks.

• Technical support to action plans, risk registers, evidence management and preparation for Building Safety Regulator engagement.

• Independent peer review and technical challenge for accountable persons, managing agents and multidisciplinary safety-case teams.

Our role is not simply to compile information. We help clients understand whether the technical evidence genuinely supports the conclusion that reasonable and proportionate steps are in place to prevent and mitigate fire-spread risk—while ensuring the resulting assurance is clear, traceable and usable throughout the building’s occupation and future change.

Phronesis Fire Engineering provides independent fire-engineering review of proposed remediation works, helping clients determine whether the scope is technically justified, proportionate to the risk and capable of delivering the intended fire safety outcome.

Remediation decisions can involve significant cost, programme, disruption and resident impact. A proposed solution should therefore be based on a clear understanding of the defect, the realistic fire scenarios it creates, the performance of the building’s existing safety measures and the residual risk once work is complete. Government guidance recognises that proportionality is building-specific and should seek permanent solutions that remove or mitigate fire and structural safety defects, rather than assuming extensive work is always required.

How We Help

We provide technical challenge at the point where a remediation scope is being defined, developed, priced, procured or reviewed. This can be valuable where reports reach different conclusions, the proposed work appears wider than the evidence supports, or important risks may not yet have been fully addressed.

Our services may include:

• Independent review of fire-risk appraisals, fire strategies, intrusive surveys, compartmentation inspections, fire-door surveys, façade assessments and other technical evidence.

• Assessment of the defect, its location, extent, condition and relevance to credible fire-spread scenarios.

• Review of the assumptions, methodologies and conclusions used to justify a proposed scope of work.

• Challenge of whether the recommended works address the underlying risk, rather than simply responding to an isolated finding.

• Identification of omissions, unnecessary interventions, conflicting recommendations and material information gaps.

• Consideration of interfaces between façade works, compartmentation, fire stopping, cavity barriers, fire doors, smoke control, suppression systems and evacuation arrangements.

• Advice on the relative value of permanent remediation, interim measures, further investigation and enhanced management controls.

• Review of employer’s requirements, specifications, drawings and tender information before procurement.

• Technical support during delivery, including design review, change-control input and confirmation of the fire-safety intent of completed work.

• Clear reporting of conclusions, limitations, recommended actions and residual risks.

A Risk-Led Review

Our assessment starts with the question: what credible fire or smoke-spread scenario is the proposed work intended to prevent, control or mitigate? We then test whether the scope provides a coherent and evidence-based response.

Under the Building Safety Act framework, “relevant steps” include measures intended to prevent or reduce the likelihood of fire or collapse arising from a defect, reduce the severity of an incident, or prevent or reduce harm to people in or about the building. This supports a whole-building perspective rather than a narrow focus on one product, survey finding or construction detail.

Practical Outcomes

The output can be a concise independent opinion, a detailed technical-assurance report, a scope-review workshop or ongoing adviser support. It is tailored to the project stage and client decision required.

Phronesis Fire Engineering helps clients proceed with greater confidence: ensuring necessary remediation is properly defined and prioritised, while avoiding poorly evidenced, disproportionate or incomplete interventions.

Phronesis Fire Engineering supports clients in navigating the Building Safety Regulator gateway process for higher-risk building projects in England. We provide clear fire engineering advice, technical coordination and informed challenge so that gateway submissions are coherent, evidence-led and aligned with the client’s design, programme and compliance responsibilities.

The client (or a person authorised to act on their behalf) submits and manages the Building Safety Regulator building control application. Although specialist consultants and contractors may prepare much of the supporting material, the client must retain sufficient oversight to be confident that the information is complete, consistent and capable of demonstrating compliance.

Our client-side role is to provide independent, practical assurance - not merely to produce another document. We can assist with:

• Establishing an early gateway strategy, programme, responsibilities matrix and fire safety information schedule.

• Reviewing the developing fire strategy and ensuring it is coordinated with architecture, structure, services, façade, landscape and operational proposals.

• Defining the scope and quality of fire-engineering evidence required from the project team.

• Identifying material risks, unresolved design decisions and interdisciplinary interfaces before they affect an application or construction programme.

• Reviewing submissions prepared by designers, principal contractors and specialist subcontractors from the client’s perspective.

• Advising on change-control implications where design, specification or construction proposals evolve after Gateway 2 approval.

• Attending design reviews, gateway readiness meetings and technical discussions with the wider project team.

• Providing independent fire-engineering challenge where a client needs confidence before signing, authorising or relying on an application.

• Supporting clear handover of fire-safety information to the future accountable person, building operator or facilities-management team.

Better Prepared Decisions

Effective gateway management begins well before submission. The most common problems arise where design information is incomplete, evidence is inconsistent across disciplines, or important fire safety decisions have been deferred until too late.

Phronesis Fire Engineering helps clients maintain visibility of these issues and make timely decisions. The result is a more structured gateway process, stronger technical evidence and greater confidence that the project’s fire safety intent is carried from planning through construction to safe occupation.

Phronesis Fire Engineering provides independent, objective fire engineering opinions where a client needs greater confidence before accepting a technical conclusion, committing to costly works or resolving a disputed fire safety issue.

A second opinion can be valuable when reports differ, a proposed solution appears disproportionate, a design has stalled, or the implications of a finding are unclear. Our review is evidence-led and undertaken with professional independence: testing the underlying assumptions, considering credible risk scenarios and explaining whether the conclusions are technically justified. Professional engineering competence includes the ability to exercise sound judgement within one’s field of practice and to recognise the limits of available information.

When It Helps

We can provide independent advice on matters including:

• Fire strategies for new-build, refurbishment and change-of-use projects.

• Building Regulations and fire engineering design approaches.

• Means of escape, evacuation strategy and occupant-management arrangements.

• Compartmentation, fire stopping, fire doors and structural fire protection.

• Façade fire safety concerns, cavity barriers and external-wall remediation proposals.

• Smoke control, detection and alarm systems, sprinklers and firefighting facilities.

• Fire-risk assessments, PAS 9980 FRAEW appraisals, intrusive surveys and inspection findings.

• Safety Case technical evidence, remediation scopes and action plans.

• Design changes, departures from guidance and proposed compensatory measures.

• Technical disagreements between consultants, contractors, insurers, landlords, managing agents or other stakeholders.

Our Approach

We begin by agreeing the specific question that needs answering and the decision the client must make. We then review the relevant drawings, reports, photographs, specifications, site information and available records.

Our assessment considers:

• Whether the evidence is sufficient, current and relevant to the issue in question.

• Whether the interpretation of legislation, standards, guidance and fire engineering principles is appropriate.

• Whether important assumptions, uncertainties and interfaces have been identified.

• Whether the proposed measures address credible fire and smoke spread risks.

• Whether alternative solutions, further investigation or targeted risk controls should be considered.

• The limitations of the available evidence and any residual risks that remain.

Clear, Usable Advice

The output is tailored to the matter at hand: it may be a concise written opinion, a detailed technical review, a workshop with the project team or ongoing advisory support. We set out the evidence reviewed, our reasoning, conclusions, limitations and recommended next steps in a clear and defensible form.

The purpose is not to create unnecessary disagreement. It is to give clients a reliable basis for proportionate, well-informed decisions - particularly where safety, programme, liability and significant expenditure are at stake.

Also commonly referred to as pre-acquisition survey report, building condition inspection or vendor survey, Phronesis Fire Engineering provides focused fire safety due diligence for property acquisition, investment, refinancing, development, disposal and major asset management decisions. We help clients understand the material fire safety risks, liabilities, evidence gaps and likely future obligations associated with a building or portfolio before decisions are made.

What We Review

Our review is tailored to the transaction, building type, available information and the decision required. It may include:

• Existing fire strategies, fire-risk assessments, plans, specifications, approvals and completion records.

• Means of escape, compartmentation, fire doors, fire stopping and structural fire protection.

• Fire detection and alarm systems, emergency lighting, smoke control, sprinklers and other fire-safety systems.

• Fire-service access, firefighting facilities, water supplies and management arrangements.

• External-wall and façade information, cavity barriers, cladding assessments and known remediation issues.

• Evidence of historic alterations, change of use, tenant fit-out, refurbishment or unauthorised works that may affect the original fire-safety design intent.

• Outstanding enforcement, notices, insurer requirements, action plans, technical disputes and remedial-work proposals.

• The adequacy, reliability and limitations of the available fire-safety records.

Higher-Risk Buildings

Where relevant, our due diligence considers the practical implications of our clients’ obligations in terms of the Building Safety Act and associated legislation, including:

• Whether the building falls within the higher risk building regime.

• The status and adequacy of safety case information, risk assessments and the digital “golden thread”.

• Evidence relating to fire escape routes, fire doors, fire and smoke control equipment, maintenance and refurbishment history.

• The likely responsibilities and information transfer issues arising from a change in ownership, repairing obligations or building management arrangements.

The Building Safety Regulator’s guidance identifies building information that accountable persons should retain, including the health and safety file, safety case report, residents’ engagement strategy, mandatory-occurrence-reporting system, refurbishment records, historical inspection information and maintenance records.

Practical Outputs

Depending on the instruction, we can provide:

• A concise RAG report for early stage decision-making.

• A structured fire safety due diligence report.

• A document review and evidence gap schedule.

• A prioritised risk register and recommended next steps.

• Commentary on the likely need for further surveys, intrusive investigation, remediation or specialist input.

• Technical support during negotiations, warranties, contractual discussions or post-acquisition planning.

Our advice distinguishes between confirmed deficiencies, potential concerns and matters that cannot be resolved without further evidence. This enables clients to make informed, proportionate decisions on value, risk allocation, programme, remediation budgets and future building safety management.