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A ventilating component for a building, particularly a ventilating soffit, provides a high ratio of ventilation flow area to component coverage area. A sheet in a plane of coverage has a spaced-channel configuration, or alternatively a terraced configuration. Ventilation openings are placed in the c

A ventilating component for a building, particularly a ventilating soffit, provides a high ratio of ventilation flow area to component coverage area. A sheet in a plane of coverage has a spaced-channel configuration, or alternatively a terraced configuration. Ventilation openings are placed in the connecting webs between the upper and lower levels, especially in sidewalls of elongated channels that open as slots on the exposed side of the soffit. These connecting webs are oriented at an acute angle relative to the coverage plane. In a channel arrangement the webs can be shaped to block direct view of the side walls. The acute angle precludes, or at least foreshortens, a view of the webs that contain the ventilation openings. The ventilation aspects are concealed while permitting a high ratio of flow area to coverage area.

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What is claimed is: 1. A ventilating component for a building structure, comprising:a panel comprising a planar sheet material extending over a coverage area;a channel formed in the sheet material, the channel opening having at least one elongated slot facing one side of the panel and having spaced,

What is claimed is: 1. A ventilating component for a building structure, comprising:a panel comprising a planar sheet material extending over a coverage area;a channel formed in the sheet material, the channel opening having at least one elongated slot facing one side of the panel and having spaced, straight channel side walls and a channel bottom projecting at an opposite side of the panel;wherein the channel has at least one ventilation opening, the ventilation opening being concealed behind the slot from view from said one side of the panel, planar portions of the panel extending on each side of channel are parallel to the plane, the channel bottom is parallel to the portions extending on each side of channel, and the straight side walls of the channel each join integrally at an acute angle with said channel bottom and with an adjacent planar portion extending on each side of channel; andcomplementary opposite joint structures at opposite edges of the ventilating component, such that said ventilating component is attachable to another such ventilating component by engaging respective complementary opposite joint structures thereof, wherein the complementary opposite joint structures include joint walls that are inclined away from a joint gap, and wherein the joint walls and the joint gap as assembled are placed and shaped substantially to resemble the channel.