Pronto Joinery Ltd manufacturer three main types of Mock Sash Window. The Economy Mock Sash, TheTraditional Mock Sash and The Fire Escape Mock Sash Window. Sashes open as per normal casement windows (top hung) but when closed, suggest the look of a more traditional sliding sash windows. They are manufactured for double glazing, locking hardware, fully draught proofing and the option of trickle vents. We use a standard horn pattern but this can be made to match the original design. Mock Sash Windows can usually be designed to comply with building regulations to cover Means Of Escape (MOE) or Fire Escape (FE).