G – Ventrolla Perimeter Sealing Program (VPSS). The Ventrolla Perimeter Sealing Procedure (VPSS) comprises several draught-proofing elements that work together to seal your entire perimeter of the sash window. These include things like the sealing system put in previously mentioned the highest sash, either in the sash alone or in certain parting bead https://epictetusj791byx0.blog-eye.com/profile