09JulJuly 9, 2019 Extension Back Larsens Inc2023-11-14T15:47:53-08:00 E Canopy, Cover, Extension, Motorsport Awning, Roof Like: 0 The backdrop of an extension that reaches from the roof to the valance. On a tapered extension, it is shaped like a triangle. On a straight back rafter extension, it is rectangular in shape. Extension back skirts zip to the extension back.