A ventilated structural panel comprising a first sheet, having a long axis defining a length and a perpendicular short axis defining a width, a plurality of spacing structural elements, fixedly attached to the first sheet such that the yield strength of the panel is greater than the individual yield strength of the first sheet, and the plurality of spacing structural elements being formed such that a plurality of unobstructed pathways are created for air to move from at least one edge of the panel to at least one of an opposite and an adjacent edge of the panel, wherein the first sheet is the only sheet in the panel.

A geodesic dome accessory having an accessory frame that utilizes a base frame and an upper frame. The base frame is attached to the frame of the geodesic dome on interior to the frame. The upper frame attaches to the base frame and secures the membrane of the geodesic dome between the upper frame and the base frame, providing a weather resistant or tight seal. The base frame forms an opening to access from the exterior of the dome to the interior. The upper frame can be in a variety of configurations, including a window, door, vent passage, or stove pipe passage. The structural framing of the dome can remain with the base frame in the shape of the opening between frame elements, such as a window, or the framing can be removed with the accessory base frame forming the structural support replacing the standard framing, such as a door.

This structure 100 of the present invention comprises two ceiling members 110a, 110b, four wall members 120a-120d, and two floor members 130a, 130b, wherein each of the four wall members has a first joint edge joined to the two ceiling members, a second joint edge joined to the two floor members, a third joint edge joined to one among the four wall members adjacent to the respective four wall members, and a fourth joint edge joined to another one among the four wall members adjacent to the respective four wall members, and wherein the two ceiling members, the four wall members, and the two floor members are each formed of a foamed body.