1. Chapter 23 Roof Plan Layout Lines and Symbols Materials
Drawing Roof Plans

2. Roof Anatomy

3. Roof Drainage
Drip Edge
Flashing
Rain Gutter
Down Spout
Pop Up

4. Roof Drainage
Cricket
Saddle
Diverter
Flashing

5. Roof Drainage
Diverter
Flashing

6. Personal Experience

7. Something is Wrong

8. Discovery

9. The Damage

10. Cause!!!

11. Lines and Symbols
Roof Shape - Steeper pitch means more shadow will be cast
Some have larger overhang for shallower pitched roofs to get same shadow
Use a solid line for changes in roof shape
Lines representing walls are hidden

12. Lines and Symbols
Hip is a line that is drawn to represent the exterior intersection between two roof planes
An interior corner is called a valley
If same pitch is used on all sides then the line is drawn at 45 degrees

13. A Dutch hip roof is drawn with a gable end
Lines and Symbols
A Dutch hip roof is drawn with a gable end
Typically 48” to 72” from exterior wall (24” increments)

14. Dimensions of sides of home and its affect on roof lines

15. Tying gables into hips

16. Drawing Bay Windows Can be done with gable end or witches hat
Square walls of the bay
Lay out ridge line
Extend lines for roof overhang

17. Varying Ceiling Heights
What would front elevation look like?

18. Materials
Nonstructural material (vents, skylights, chimneys, and downspouts) are locally noted

19. Downspout Locations/ Sizes/ Number Needed

20. Chimneys and Skylights

21. Dimensions Very few dimensions are required
Only overhangs and general locations of objects are dimensioned

22. Required Elements: Example Perimeter walls and posts
Dimensions at overhangs
Hips, Valleys, & Ridges noted
Pitch noted