C – Parting bead. There's two parting beads positioned on each side from the sash box, running vertically from top rated to bottom amongst the sashes. Every single 50 % area of a Ventrolla parting bead contains a draught-proofing process that faces the adjacent sash, forming a cosy temperature seal.  The previous president with https://trevornqpmh.theisblog.com/36080425/5-essential-elements-for-sash-window-draught-proofing