The order of work
Valleys come first: lining and valley metal go down before the shingles or panels cover their edges.
The 2018 IRC reproduction installs valley linings before the shingles go on, and Quality Edge installs its valleys before the panels.
Then the kickout and a step piece with each course; at a headwall, bed the base flashing first and turn the first step piece over it. Hips follow; the ridge is last.
Flow of seven steps from top to bottom: set up fall protection, install valley lining and metal, set the kickout, install step pieces with each course (at a headwall the base flashing goes first), cover hips then ridge, lap the wall covering over the metal, then inspect and record measured values.
- 1
- Fall protection set up under 29 CFR 1926.501
- 2
- Valley lining, then valley metal, before the shingles or panels
- 3
- Kickout as the first step piece, sealed to the deck and not the wall
- 4
- One step piece with each course, upper over lower; at a headwall the base flashing is bedded first and the first step piece turns the corner over it
- 5
- Hips, then ridge; on metal, closures then the cap
- 6
- Wall covering and house wrap lap over the metal, not under
- 7
- Inspect and record measured values against the governing document
Sources
- 2018 International Residential Code, Section R905 Requirements for Roof Coverings, R905.2.8.2 Valleys (as reproduced by the City of Pacific, Missouri) - City of Pacific, Missouri (reproducing the International Code Council 2018 IRC)
- Standing seam installation guide, 2015 edition (revision R1 filed with Florida product approval FL17126); confirm the current revision with the maker - Quality Edge (as filed with the Florida Building Commission)
- Step and Kick-Out Flashing at Roof-Wall Intersections (last updated 2020-09-14) - U.S. Department of Energy / Pacific Northwest National Laboratory, Building America Solution Center