u lay your shingels level to the hip and cut the excess diagonal off then cover the hip after each side is roofed with a "cap"
Yes, a gambrel roof is the same as a barn roof. It is similar to a mansard roof, however the mansard roof has "hipped" corners and the gambrel roof does not.Hope that helps!
No.
Yes
The English term 'gambrel roof' means a gable roof with two slopes on each side and the lower slope being steeper