First generation Geolam products were heavy, solid decking products. But in 1992 a production method developed by Japanese engineers led to the manufacture of the world’s first hollow cell profiles and their typical honeycomb structure. Hollow cell boards are lighter, more efficient and absorb much less water than solid decking products used before 1992. Their cross sections can be selected to permit substantially larger spacing between joists in the substructure. The stability and ease of assembly provides, for this second generation, profiles which enable fast installation in larger properties and public sector construction projects.