Get down the sheet. Healthy the self-adhesive white steel strip to the window body matching the periphery exactly for the pencil lines. So far as toughened glass, The fundamental alternative is often 4mm toughened glass. From there, it is possible to update to 6mm toughened glass for improved thermal insulation https://modern-ceiling-lights69357.mpeblog.com/49826209/noise-reduction-secondary-glazing-an-overview