Double Glazing - the 24mm Insulated Glass Units are Double Glazed with an Argon Gas insert as standard to help reduce the heat conductance between the glass panes. All of our sash windows feature a 4mm clear glass pane on the outside, and a 4mm Low-E glass pane on the inside. This, together with a Warm Edge Spacer Bar and our improved multi-chamber frame provides an A-Rated Window

All of our Double Glazed Windows are Toughened throughout as standard

Acoustic Laminated Glass - in addition to our Double Glazed standard, you can choose to upgrade your Sash Windows to Acoustic Laminated, which gives excellent noise reduction, even when compared to double glazed. Acoustic Laminated Glass consists of two 3mm pieces of glass that are bound together with a noise reducing inter-layer, then a 4mm Toughened unit all spaced with a 14mm Argon gas filled insulation chamber