Weatherstripping: This material traces the sides of the sash to help keep out air and moisture when the window is shut. G – Ventrolla Perimeter Sealing Technique (VPSS). The Ventrolla Perimeter Sealing Program (VPSS) comprises different draught-proofing aspects that get the job done with each other to seal your complete perimeter in the https://cruzkcnyl.imblogs.net/85378402/sash-window-draught-proofing-an-overview