Roof block unit with a capping and overhang portion as link for roof tiles and double skinned walls

摘要

A building component comprises a block unit of the figure 1 having a capping portion (10, 10'') and an overhang portion (12) with the outer face of which serving as a barge/fascia board (14A). A lower face of the overhang portion serves as a soffit. The block unit is for use with others of its kind in being laid side-by-side as a course on top of a gable wall or front/rear wall. This component is for use in constructing a roof having a double-skinned wall provided with a cavity between its inner and outer skins.