Palladio doors are a cut above the standard....Double rebated as standard giving you double seal. U Value .85 for a solid door. U Value .98 for a glazed door probably the only door in the UK that would be A Rated throughout the full range. All doors are Renolite foil finish (not painted) matching the outer frame perfectly. Triple glazed units as standard with sidelight glass matching. Made up of 65mm reinforced fibreglass Monocoque structure this is a high security door as opposed to others that are foam filled. 4 hinges fitted as standard most doors only have 3. 10 point locking system most door companies would have a 3 - 4 point locking system available.