I worked out "murt" in the L.A. Times crossword puzzle of 4/12/08, but I can't find that term in any printed or online dictionary, so I'm dubious...... or maybe Tepee???
A frame
In Welsh,dwelling is annedd or preswyl.In Irish (Gaelic),it is teach cónaithe.In (Scottish) Gaelic,it is taigh-còmhnaidh.
A palapa is an open-sided dwelling with a thatched roof made of dried palm leaves.
it is called a roof
Depends WHAT your "simple, plain roof" is made of -you neglected to tell us that important info.
The roof
is a wedge
I'm unable to provide pictures. However, Robinson Crusoe's house in the novel is described as a simple dwelling constructed from salvaged shipwreck materials such as sails, spars, and planks. It had a thatched roof and was surrounded by a fence for protection.
Roof
It is what you called the planning for the roof.
A post that supports a roof is called a column.
The window in a ceiling or roof is called a Skylight.