ROOF TYPESAPPLICATIONS OF TECHNOLOGY

The roof of a building is often described by it’s type. Roof types are determined by the form and slope/pitch of the roof.

ROOF TYPES

SLOPE = RISE : RUN

(# of inches) : (per foot) 5

12

5:12

Shed Roof – Slopes down on one side

Flat Roof – Very little slope (minimum 1/8 inch per foot)

ROOF TYPES

ROOF TYPES

Gable Roof – Slopes down on two sides

Hip Roof – Slopes down on all sides

Dutch Roof

•Slopes down on all sides

•Upper portion is a gable roof

•Lower portion is a hip roof

ROOF TYPES

Valley – the junction of a roof face with another or a wall

ROOF TYPES Roof Pitch Low Up to 3:12 Medium 4:12 to 7:12 High 7:12 to 12:12

Mansard Roof

•Slopes down on all sides

•Lower portion has a long, steep slope

•Upper portion has a short, shallow slope

•Dormer-small structure with a window projecting from a sloping roof

ROOF TYPES

Gambrel Roof

•Slopes down on two sides

•Lower portion has a steep slope

•Upper portion has a shallow slope

•May have dormers

ROOF TYPES

Conical Roof•Circular in plan

•Slopes to a point on top

ROOF TYPES

DomeVaulted Roof