G – Ventrolla Perimeter Sealing Method (VPSS). The Ventrolla Perimeter Sealing Technique (VPSS) comprises numerous draught-proofing factors that work collectively to seal all the perimeter from the sash window. These contain the sealing technique installed higher than the best sash, either within the sash alone or in certain parting bead struggling with the https://neilk420ckr0.blogrelation.com/profile