Chapter 23 Roof Plan Layout Lines and Symbols

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

Roof Anatomy

Roof Drainage Drip Edge Flashing Rain Gutter Down Spout Pop Up

Roof Drainage Cricket Saddle Diverter Flashing

Roof Drainage Diverter Flashing

Personal Experience

Something is Wrong

Discovery

The Damage

Cause!!!

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

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

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

Dimensions of sides of home and its affect on roof lines

Tying gables into hips

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

Varying Ceiling Heights What would front elevation look like?

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

Downspout Locations/ Sizes/ Number Needed

Chimneys and Skylights

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

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