SASH WINDOWS - AN OVERVIEW

G – Ventrolla Perimeter Sealing Procedure (VPSS). The Ventrolla Perimeter Sealing System (VPSS) comprises a variety of draught-proofing elements that operate jointly to seal the whole perimeter on the sash window. These involve the sealing method set up earlier mentioned the top sash, either in the sash itself or in some parting bead facing th