[CURB sb.] A roof of which each face has two slopes, the lower one steeper than the upper; a mansard-roof.
1733. F. Price, Brit. Carpenter (1753), 18. B is called a kirb roof, and is much in use, on account of its giving so much room withinside.
1820. Tredgold, Carpentry (1853), 95. It appears to have been with a view of lessening … height that the Mansard or curb roof was invented.
1879. D. J. Hill, Bryant, 143. A spacious … mansion … with a curb-roof, antique dormer windows.
