10’x6′ Leopard Tongue-and-Groove Windowless Apex Shed Plus. The Leopard Tongue-and-Groove Windowless Apex Plus timber shed is among our top-selling items, offered in expanded dimensions, yet this variation of the sought-after shed arrives without windows! The windowless edition is ideal for individuals in search of reliable storage with added seclusion without compromising on excellence. 10’x6′ Leopard Tongue-and-Groove Windowless Apex Shed Plus