The asymmetrical gable roof is a variant of the regular gable roof. It’s similar to a gable roof in that it also consists of two sloping roof planes that intersect along the ridge to form an inverted ‘V’ (or Λ-shape).
The difference, however, is that its two roof planes aren’t the same. Its roof planes may vary in length and/or pitch (slope). In contrast, a symmetrical gable roof’s roof planes are equal in both length and pitch (slope).
A gable is the triangular portion of a facade above eave level between intersecting roof planes.
Synonyms asymmetrical gable roof
You’ll hear different terms used for the asymmetrical gable roof, for example, catslide roof and saltbox roof.