Notes from practice.
Pieces on formation, funding and AI integration — written out of live mandates and our own ventures.
Why German Paperwork Stops Builders, and What We Built About It
Builders from abroad have the skills but get stopped by German contracts and letters. Why we built BauWalker.OS, an AI assistant for German construction law.
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Protecting Personal Data in AI Systems: Why "Asking the Model" Isn't Enough
Personal data can't be protected by a prompt. Why data protection in AI systems must be a separate, testable mechanism — and how we verify it.
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From Photo to Quote: How AI Can Change the Sales Process in Renovation
From our Badrenovo venture: how a photo can become a realistic visualization, product configuration and the basis for a detailed quotation during the customer consultation.
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Drone Meets Laser Scanner: How We Capture Existing Buildings for Renovation Projects
Drone LiDAR combined with terrestrial 3D laser scanning — georeferenced point clouds, Scan-to-BIM and as-built drawings as the basis for roof, façade and energy renovation planning.
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How We Built a Secure AI Assistant for a Construction Company
A RAG architecture for a German property developer — hybrid search, a local language model for sensitive project data, EU cloud for public law, and why traceability beats autonomous agents.
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Chatbots, Automation and Content Workflows: What We Build with n8n
How Bergstone uses n8n to build chatbots, automate business processes and create content workflows — self-hosted, GDPR-compliant and flexible.
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