C – Parting bead. There are 2 parting beads positioned on both sides in the sash box, working vertically from top rated to base involving the sashes. Each 50 % segment of the Ventrolla parting bead contains a draught-proofing procedure that faces the adjacent sash, forming a cosy temperature seal.  a protracted, slim piece https://elliotth678qlj5.blogdemls.com/35690895/not-known-facts-about-sash-windows