G – Ventrolla Perimeter Sealing Method (VPSS). The Ventrolla Perimeter Sealing Procedure (VPSS) comprises different draught-proofing features that perform together to seal your entire perimeter of the sash window. These contain the sealing procedure set up earlier mentioned the top sash, both inside the sash itself or in certain parting bead experiencing the https://alfredc602dbz4.mybuzzblog.com/profile