A Pattern Building in Turu 21, Estonia


A modular redesign of a concrete office building originally designed by KTA architects. The new design features 3D LVL modules and is produced off-site. The team of authors: Egle Vogt, Lauri Läänelaid, Renee Puusepp, Marianna Zvereva, Eero Tuhkanen, Kristo Kalbe

Key benefit

Reduction of the embodied carbon footprint by 1/3

Material list

LVL, CLT, concrete, stone wool, dried lumber, glass, steel, copper, PVC

Ecological values

The redesign reduces the embodied carbon footprint by 86kg CO2e/m2 as compared to the original design, saving nearly 270 tonnes of CO2e in total. The design works as a carbon sink.



  • Economical span (mm)
  • Thickness (mm)
  • Airbourne sound reduction factor (dB)
  • Impact sound transmission (dB)
  • Resistance to fire class
  • Thermal properties



  • The idea really focuses on modular building, In particular, I'm a fan of the clever connector designed to transfer forces in the corners. A key issue in modular multi-storey buildings...congrats for that!


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