polycarbonate corrugated sandwich panels with water inside - the

architecture board cellular clarity coated colorful colors composite conservatory construction corners coroplast corriboard corrugated covering desk flat glazing greenhouse honeycomb hothouse industry isolated limpidity material panel plastic polycarb polycarbonate polymer proof protection rippled sandwich shed sheet shield skylight solarium sun sunroom sunspace texture thermoplastic transmissivity transparency transparent twinwall water wave wavy white