Chimney cap

A chimney cap for protecting the upper open end of a chimney flue for ingress of undesirable elements, said cap comprising a housing having four perforated sides which are integral in succession with one another, said four sides being formed from a flat metal blank the longitudinal span of which is greater than the transverse span thereof, said blank including along one longitudinal edge thereof four flanges integral with an extending transversely outwardly of said blank, said flanges being spaced in longitudinal succession from one another, said longitudinal edge of said blank and said flanges extending therefrom forming a base of said housing for nesting on the upper open end of a chimney, said flanges each being bent into two integral flange portions of substantially the same transverse dimension, one of said integral flange portions of each of said flanges which is most proximate to said longitudinal edge of said blank being bent back over and beyond said longitudinal edge and extending parallel to the plane of said blank, the other one of said integral flange portions of each of said flanges being bent to extend perpendicular to the plane of said blank.