Gap analysis for existing buildings

Fire protection retrofitting for existing buildings takes place in several steps: a cross-trade comparison of the existing situation with the permit documentation, development of economical remediation proposals, preparation of an individual fire protection verification or performance-based fire protection concept, on-site supervision of the retrofit works, and final follow-up fire protection inspections. It is essential that the fire protection concept takes existing grandfathering rights into account while ensuring legal compliance and an optimal cost-benefit ratio. Lindner also handles the preparation and submission of the required verification documents and, if necessary, the planning and filing of variance applications under applicable building code law.

Significant fire protection deficiencies can result in severe consequences such as prohibition of use, closure of operations, or high fines – in serious cases, immediate closure can be legally justified if there is a concrete risk to life and limb. These risks do not only arise in the event of an actual fire but can already threaten the existence of a business during ongoing operations. To avoid such consequences, Lindner documents the differences between the as-built and approved conditions and, together with the client, develops economical remediation proposals as well as the required verification documents.

Grandfathering means that a building may generally continue to be used even if it does not meet current building code requirements – however, this protection lapses in the case of significant structural alterations, changes of use, or when there is a concrete risk to life and limb. Older buildings in particular often conceal significant deficiencies in structural fire protection, where the as-built condition deviates from the officially approved condition. Lindner carries out a detailed existing-building analysis, comparing the approved condition based on permit documentation with the actual on-site condition, to determine whether and to what extent grandfathering still applies.

A professional existing-building analysis is important because it is the only reliable way to determine where the as-built condition deviates from the approved condition and which deficiencies actually require remediation. In older buildings especially, increased fire risk is often due to outdated construction methods, materials, and missing fire compartments, which require special attention during retrofitting. Lindner inspects the building condition on site and compares it with the available permit documentation, developing economical and legally compliant solutions on this basis – from initial deficiency documentation to on-site supervision of implementation.