For broken glass, an easy way to tell is in the way it has shattered. Toughened glass shatters into many tiny little pieces. Laminated glass will break into shards but generally stay held together by the clear ‘inner’ film. Ordinary glass breaks into shards and will fall from the frame. Unbroken safety glass around the house will normally have a safety glass stamp. If you are still unsure or have new windows or doors to be glazed, simply let us know the size and location in the house and we will advise over the phone or via email (bathroom windows almost always require safety glass).