S.I.M.M.
Holzraum System creates a Single Integrated Manufacturing Model combining structural, building fabric, energy performance, manufacturing and mechanical systems perspectives and aligns them with the project stakeholders' goals.
Holzraum System works with architects, engineers, builders and developers and connects them with our manufacturing processes and efficiencies in order to provide building envelope analysis and consulting as needed, resulting in a complete integration of project design intent, passive house principals and cost-effective offsite manufacturing. Holzraum System keeps the envelope design and planning process connected - always maintaining alignment between client, engineering and manufacturing perspectives. As we create a precise and comprehensive single 3D model of your structure, we apply our building science training and Wufi static and dynamic software tools. This eliminates thermal bridging, achieves superb air-tightness, and delivers highly vapor-open moisture profiles in our exterior wall and roof assemblies: eliminating risks of mold conditions and assembly decay and assuring the safest, healthiest indoor air quality possible.
When the S.I.M.M. is complete, a detailed set of geometry drawings is prepared and reviewed by the project's structural engineer, architect and builder to ensure the whole team agrees with design intent and fabrication strategies. Once the drawings have been approved for fabrication, Holzraum System creates machine files and factory instructions from the S.I.M.M. to ensure that every aligned perspective is manifest in the delivered panels and loose parts.
Holzraum System® marries high-performance wooden building envelope design and translation for off-site manufacturing with interpretation and advocacy for designers, developers, owners, and manufacturers.
Carbon Smart By Design
TM
Holzraum System is a design and consulting partnership combining decades of experience in architectural, structural and heavy timber design, high performance and Passive House construction, CADCAM (computer aided manufacturing) for wooden structures and software development for streamlining design and manufacturing processes. Formed as a Passive House consulting and building envelope design to manufacturing firm, Holzraum System was based on our commitment to connecting builders and architects with passive house and off-site manufacturing in order to achieve unmatched comfort, superb air quality, extreme building resiliency, and among the lowest embodied + operational carbon footprints in the building envelope industry.
Ilka Cassidy, Dipl.-Ing. Architecture, CPHC, (co-founder) is passionate about Passive House envelope design and building science, focusing on the benefits of natural building materials. She grew up in Germany and received her Diploma of Engineering/ Architecture degree from the RWTH Aachen. Ilka connected to the US during her year at the University of Washington in Seattle where she won a Scholarship to study within the graduate program. Eventually she moved to Philadelphia where she co-founded C2 Architecture in 2005. Through Holzraum System, she has worked to merge the precision and scalability of prefabrication with the use of healthy, low-carbon materials, all while optimizing energy efficiency with Passive House principles. She has guided multiple projects through Phius certification.
Ilka is also committed to expanding knowledge in the industry, serving as co-host of the Passive House Accelerator Podcast and Construction Tech Live events. She is a frequent conference speaker and an active member of Green Building United in Philadelphia as well as NESEA.
Steve Hessler (co-founder) is a heavy timber structural designer, project manager and PHIUS+ certified passive house consultant with over 25 years of experience designing, building and managing structural-thermal envelope offsite fabrication projects as well as on-site high performance construction projects. Since 2008 Steve has been combining 3D modeling, integrated project delivery and building science principals to design and manage off-the-grid, net-zero, and passive house projects. Steve received his bachelors in Communications Strategies from the Pennsylvania State University in 1990 before completing a five year apprenticeship program as journeyman and lead restoration carpenter.
David Hessler (co-founder) is a biologist, computer programmer, and entrepreneur who has worked in biopharm development, and co-founded three startups: a biotechnology company and two scientific software development companies. He has served as a senior software director and product portfolio manager for BIOVIA Dassault Systemes, and served on the project management team for construction of 30 custom homes in Ecovillage @ Ithaca, NY. David received a Biology degree from the Pennsylvania State University, and did graduate work in biochemistry at the University of Rochester.
Matt Bischoff (software developer) is the lead developer of Holzraum Catch and has over 10 years of experience in developing web applications. He has a strong background in full stack development, and has a solid understanding of software architecture, design patterns and database management. Matt is a skilled problem solver who enjoys writing software to solve real-world problems. Matt received his bachelor's degree in Computer Science from Ithaca College in 2012.
