Glazing systems provide maximum solar control at Wembley Park outlet Aug 6, 2014 | Articles Double glazed units deliver a sound reduction of 37Rw dB and feature outer panes of 6mm SGG Securit Cool-lite SKN165ii and inner panes of 13.5mm SGG Stadip Protect, with a 14mm 90% argon filled cavity providing a U-value of 1.1.