| 摘要 |
The invention relates to exterior wall and roof constructions wherein a space is provided between an outer sheathing layer and the underlying structure for passage of air to assist in heating, cooling and ventilating functions. Perforated channel members are installed in the area at which air enters and/or leaves the vented space, permitting free flow of air while preventing entry of insects, rodents, or other foreign materials into the space. Means may be optionally provided for blocking off air flow through the vent space when desired to assist in heating and cooling functions. Plenums and ductwork may be provided for recirculation of air from the vented spaces to other portions of the structure. In one embodiment, a vented roof structure is provided which may advantageously be employed in conjunction with an interior, cathedral-type ceiling. An angle bracket useful in both marking roof rafter members for cutting and in assembly thereof is also disclosed.
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