G – Ventrolla Perimeter Sealing System (VPSS). The Ventrolla Perimeter Sealing Method (VPSS) comprises several draught-proofing components that perform collectively to seal the entire perimeter from the sash window. These consist of the sealing process put in previously mentioned the top sash, both inside the sash by itself or in some parting bead https://alexy454kjf0.tokka-blog.com/profile