1. Chapter 21
Roof Plan Layout

2. Links for Chapter 21
Lines and Symbols
Materials
Drawing Roof Plans

3. Lines and Symbols Roof Shape - Steeper pitch means a smaller overhang
Use a solid, bold line for changes in roof shape
Lines representing walls are thin and dashed

4. 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

5. Lines and Symbols A Dutch hip roof is drawn with a gable wall
Typically 48” to 72” from exterior wall
Partial sections may need to be drawn if roof is complicated

6. Lines and Symbols Bay windows require special consideration
Square walls of the bay
Lay out ridge line
Extend lines for roof overhang

7. Materials
Structural material is represented with a thin line showing the proper direction and span

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

9. Materials Chimney Skylight
Metal ones are represented with a 14” circle
Masonry ones are 16” square
Skylight
Connected to the ceiling with a chase or well
Allow extra light into rooms

10. Materials Gutters and Downspouts
Used to remove water from rain off the roof
Diverters are used if there is not a lot of rainfall during the year
Represented with a 3” square or circle
“H” is for the high side and “L” is for the low side of the gutter

11. Dimensions Very few dimensions are required
Only overhangs and openings are dimensioned

12. Drawing Roof Plans Draw perimeter walls and supports
Draw overhang limits
1’-0” for gable end walls
2’-0” for eaves
Draw ridges, hips, and valleys
Insert nonstructural materials

13. Drawing Roof Plans Add dimensions for overhangs and skylights
Label all materials using local and general notes, title, and scale
Check the drawing for completeness and quality

14. Drawing Roof Plans

15. Drawing Hip Roof Plans

16. Drawing Dutch Hip Roof Plans