DOUBLE MEMBRANE Leppävaara
“The experience gained in designing and building of large and advanced technology air-supported balloons, make the textile a valid solution forcovering entire football fields. These projects where the energy efficiency and functionality of the structure are combined with architecture, are a fertile ground for interesting projects by using durable textiles and advanced engineering solutions”.
This is the case of the air-supported balloon built in conjunction with AABA for the town of LEPPÄVAARA in Finland, where we – as Canobbio Textile – built a cover measuring 80 m x 54 m wide to cover the winter playing field of the town’s football team.
The permanent air-supported balloon was made using the double membrane technology: an air chamber with an insulating function was made. This type of cover consists of an outer membrane which is welded at high frequency with an inner membrane. Only the outer one has a static function and therefore absorbs all the forces generated by external loads, such as wind, rain, etc. The inner membrane has the sole function of forming an air chamber for thermal transmittance. Besides using the double membrane, we used a type 3 membrane with silver colouring and created special glass portals to increase the internal visibility of the cover.