C – Parting bead. There are two parting beads positioned on both sides on the sash box, jogging vertically from top rated to base concerning the sashes. Each and every 50 percent part of the Ventrolla parting bead has a draught-proofing method that faces the adjacent sash, forming a snug weather conditions seal.  E – https://makeupproducts13693.activoblog.com/40372582/the-sash-window-draught-proofing-diaries