Roof elements and glulam frames with skill and experience Optimihallit Oy delivers Optimi roof elements and Late glued timber frames for various hall buildings designed, installed and waterproofed, as well as larger product sub-assemblies if necessary. The area of operation is the whole of Finland. Deliveries to northern Sweden and northern Norway are possible. Optimi roof elements are designed by Suunnittelilinja Finland Oy in Turku and manufactured by Optimihallit Oy's contract manufacturer Ruukin Saha and Höyläämö Ky in Siikajoki, Northern Ostrobothnia. Late glulam frames are designed and manufactured by Optimihallit Oy's partner Late-Rakenteet Oy in Turku.