Recorded condition
Date, scope, finding, classification and photographs.
HydroSentinel · AquaRisk-Analyse®
The practical experience behind HydroSentinel.

Holger Holling’s book “Mein Name ist Sentinel.” shares experience from plumbing, heating, water damage and leak detection. It is not a technical standard, maintenance contract or legal guide. Its approach is to record what is visible, describe current conditions rather than generalise, and leave decisions with the customer. The linked book is in German.
View the book on AmazonLike a service logbook: the initial assessment, findings, photographs, decisions, work and follow-up inspections are brought together for the property. An invoice records reported work; a new visual inspection is needed to describe the current visible condition.
Date, scope, finding, classification and photographs.
Work commissioned, third party planned or no action at present.
A dated addition with a service or repair document.
New findings, outstanding items and the next recommended assessment.
Intervals depend on the property and findings. Follow-up assessments are separate commissions, not an automatic subscription. The history covers commissioned assessments and supplied documents, not continuous monitoring. Immutable storage or cryptographic protection is not promised.
Tell us the property type, postcode/location and what you need. Holger Holling will agree the scope, total price and appointment with you. Enquiries are non-binding; a commission arises only after personal agreement.
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