Wooden summerhouse garden shed framing 27 x 45mm shiplap 12mm floor area 576 m width base dimensions 240 cm depth base dimensions 240 cm firsthhe 211 cm wall thickness 12 mm number of rooms 2 dimensions in feet 12x8 ft material wood colour honey brown roof shape pent roof type of glazing styrene window type firmly integrated window number of windows 4 base structure with floor features terrace cladding style shiplap tongue and groo