The Cavilintel is designed for use with cavity walls. Unlike a conventional lintel, the Cavilintel incorporates a roller shutter within its box design. Electrically operated with an internal manual override facility, the shutter descends to protect the door or window opening under. The Cavilintel package includes shutter guides that are built into the cavity wall reveals. The shutter ends are thus retained within the channels behind the external masonry skin. The Cavilintel is additionally accompanied with insulation and damp protection cavitrays at head and sill level, and provides a complete opening package. Developer may offer customers additional security of openings immediately or benefit of upgrading at a later date.