In the Queen's English.....
...its a porch :-)
(
Khaine,
Fri 24 Oct 2003, 14:36,
archived)
Actually,
More of a screen door with swappable glass panels, usually.
In the U.S., A "porch" consists of an expanse of exterior floor, occasionally with screened or lattice walls and a roof.
/pedant
(
Syncubus Yarr! Ye'll be walking Planck's Constant! [GMT-5],
Sat 25 Oct 2003, 2:20,
archived)