SASH WINDOW DRAUGHT PROOFING NO FURTHER A MYSTERY

C – Parting bead. There are 2 parting beads positioned on each side on the sash box, functioning vertically from leading to bottom concerning the sashes. Each and every fifty percent section of a Ventrolla parting bead is made up of a draught-proofing program that faces the adjacent sash, forming a cosy weather seal. Putting in effective dra