With out altering any existing window openings, you can have superior-undertaking seem reduction windows in only seven days, from purchase to set up. Purchased 2 units for our front bedrooms as we've been on a noisy main road. Put in them yesterday and the primary difference in noise is remarkable. https://cesarwcgjm.blogdomago.com/25971594/hammersmith-secondary-glazing-solutions-things-to-know-before-you-buy