The 7 x 5 value overlap apex shed from waltons is a garden building aimed at solving all sorts of basic storage issues that gardeners have these days these wooden sheds are constructed from overlapping timber panels which sit on a sturdy 27mm x 32mm framing of course with the apex roof line you get more headroom and more space for storage as well the 7 x 5 apex shed comes with four styrene glazed windows because styrene is considered to be a safer alternative to glass a butterfly catch