Dormer
The window is still a window, but the whole opening with the intersecting roof line producing 2 valleys and one ridge, and the walls and 3 sides with the window opening is called a Dormer.
Valley
55.77
A U shaped room has 8 edges on the floor, 8 on the roof and 8 vertical edges, making 24
A comprehensive and detailed examination beyond the scope of a real estate home inspection might be considered
I'm assuming by "cottage style roof" you mean the shape which is sort-of achieved by using two trapezium shapes to depict the front and back of the roof (shorter edge being the uppermost edge) and then using two triangles for both the sides. (A trapezium shape is like half a hexagon). If this is the case, you calculate the area of the front of the roof by measuring the lower edge of the trapezium/roof and adding that measurement to the upper edge of the trapezium/roof, dividing by two, then multiplying by the distance between the upper and lower edge. (I.e exactly the same as finding the area of a trapezium). Assuming the back of the roof is the same, multiply the "front of the roof" measurement by 2. This gives you the area of "front and back of roof". To include the sides of the roof, measure the lower edge of the triangle-like shape and multiply by the vertical height. Add this measurement to the "front and back of roof measurement" to get "total area of roof". If you have kept all measurements in feet during the process, you will end up with "total area of roof in square feet" as required. Of course, it's possible that the roof may not fit the description of specific shapes, in which case it's best to make an estimate then add on a bit extra.
Chalet
2 sides in a lean-to It's a shack with one sloping side against a (usually) vertical side. The ends are open, and the roof is formed by the meeting of the 2 sides.
A roof that is pitched off horizontal to allow the runoff of water, snow, or ice.
a Chalet
To shed snow.
it called the saltbox
"Roof windows are windows in the roof, such as, skylights or pivot-type windows. They allow sunlight into a room and create a feeling of expansiveness."
It's a Leanto yay pogo
Valley
Sloping roofs are self-draining from rain and snow, and less likely to leak.
do grants cover windows and roof
A roof/