curb roof

from WordNet (r) 3.0 (2006)

curb roof
    n 1: a roof with two or more slopes on each side of the ridge

from The Collaborative International Dictionary of English v.0.48

Curb roof \Curb" roof`\ (r??f`).
   A roof having a double slope, or composed, on each side, of
   two parts which have unequal inclination; a gambrel roof.
   [1913 Webster]