If you don’t want thick double glazing, trim double glazing has width of only all around 14mm (although some are as slim as 10mm) and is much more productive. The U-Price (the measurement that implies the window’s thermal performance) is better and trim glazing is more aesthetically satisfying. Bespoke shutters https://thermal-performance12111.blogozz.com/34910279/not-known-facts-about-sash-windows