1. Chapter 22 Roof Plan Components Roof Plan Types Roof Shapes
Roof Materials
Vented soffit

2. Roof Plan Types
Roof plans are used to show the shape of the roof including roofing materials, vents, and any other objects located on the roof
Simple roof plans show roof vents, ridges, valleys, direction of slope.
Complex roof plans show individual roof members, connectors, etc.

3. Roof Pitch/ Slope
Slope or roof pitch is the description of the angle of the roof as horizontal run and vertical rise
Pitch is represented with a fraction which converts to an angle
Simple Approach example

4. Roof Pitch/ Slope
10/12 vs. 4/12 (6/12 typical)

5. Simplified Version we will do in this class
Required Elements:
Dimensions at overhangs
Hip and Valley noted
Pitch noted
Roof Vents

6. Flat Roof Shape Economical
Built with slight pitch so water can run off
Parapet (false wall) is built around the roof

7. Shed Roof Shape Less drainage problems compared to flat roof
Can be built at any pitch (no shallower than 4/12 in our climate

8. Gable Roof Shape
Two shed roofs meet at a ridge
Two or more gables meet to form a hip or valley

9. A Frame Roof Shape
Rafters are used as supporting walls
The structure appears to form the letter “A”

10. Gambrel Roof Shape Traditional shape from colonial period
Upper roof is greater pitch than lower roof
Reduces cost of exterior building materials

11. Hip Roof Shape Eliminates roof mass Structure appears smaller
Two hips form a valley

12. Dutch Hip Roof Shape Combination of hip and gable roof
Center is similar to a gable roof
Ends are similar to a hip roof

13. Mansard Roof Shape
Similar to a gambrel but angled lower roof is on all four sides
Flat roof on top

14. Dormer Roof Shape Opening in a roof to allow for a window
Used in gable or hip roof

15. Dormer Roof Examples

16. Asphalt and Cedar Shingle Examples Advantages vs. Disadvantages?

17. Clay and Slate Shingle Examples Advantages vs. Disadvantages?

18. Metal Roof Examples Advantages vs. Disadvantages?

19. Roof Venting 1/150 square feet 1/300 sq ft if in upper half Ridge
Turtle
Dormer
Fan

20. Green Roofing Practices
PHOTOVOLTAIC
Solar Thermal