Structure and water protection
The roof deck supports the assembly. Water-protection layers and underlayment provide secondary protection beneath the finished roof material.
- Deck condition and replacement allowances
- Leak-barrier locations
- Underlayment type and coverage
Edges, starts and penetrations
Drip edge, starter material, pipe boots, wall flashing and other transitions help manage water where the roof surface begins or is interrupted.
- Eave and rake edge details
- Starter course placement
- Flashing at walls, chimneys and pipes
Shingles and ventilation
The finished material and the intake/exhaust strategy must fit the roof design. Ventilation changes should be based on the existing assembly, not a generic rule.
- Specified shingle and accessory system
- Ridge or other exhaust details
- Existing intake conditions