Hinged secondary casement windows allow full and easy access to the outer window. They are neat and unobtrusive with no transoms or mullions to impede the view and will generally provide higher levels of security. This style of secondary glazing is also appropriate for doors.
Series 41 is a heavy duty system designed to treat large windows and doors and through use of thicker glass or sealed units, provide higher levels of acoustic insulation or security.
Series 45 is a strong system with slender sight lines allowing full and easy access to the outer window or door. Minimal dust ledges and high compression seals also make this window ideal for laboratory and clean room applications
Series 47 - Heritage A slim but strong hinged single casement designed to be located in the staff bead position of an existing sash window. It is specially designed for Heritage Applications.
Series 50 is a high security system offering resistance against intruder attack or blast. It can also treat ‘monumental’ sized doors and windows and will accept sealed units for optimum thermal insulation.
guidance notes
Useful for treating windows where new sightlines are undesirable, for example a double-hung sash window in a listed property. Treats single or double doors. The double casements have no central mullion and so permit full width access. High compression seals will optimise noise insulation and also minimise airflow in locations such as laboratories where pressure differences have to be maintained. Full access is provided for window cleaning/maintenance. Standard multipoint locking improves security. Ceiling bulkheads and upstand details will prevent hinging. Introduction of a transom to combine the casement with another window style can overcome this problem. Sprung stays can be specified to allow windows to be restricted to 100mm opening.
