https://www.willis-construction.com/post/building-greener-sustainable-formwork-solutions-in-nz-with-peri-duo 2025-11-05 https://static.wixstatic.com/media/fe2976_4ecb674404c94b0684d6e7fa3cc67cb4~mv2.jpg Research and development on environmental impact https://www.willis-construction.com/post/faster-smarter-formwork-how-peri-duo-is-transforming-residential-construction-in-nz 2025-08-14 https://static.wixstatic.com/media/fe2976_2080bcde8a22442aada60abcb208b1f7~mv2.jpg Residential construction project using the PERI DUO Formwork system supplied by Willis Construction Group https://www.willis-construction.com/post/building-more-than-boxes-supportin-construction-workforce-nz 2025-07-29 https://static.wixstatic.com/media/fe2976_44dcca2c6fff478cb152def4f5350b5a~mv2.jpg