Install House Wrap and Water-Resistive Barrier

A. Finished-Project Specification

Scope: one completed WRB installation covering every exterior wall elevation of the structure accepted in Project 01, including base-flashing integration at the lower transition, corner wrap or corner pieces, vertical seam overlap, opening-flap preparation, and penetration treatment as planned in Project 01.

B. Required Documentation Schedule

Document	Source	Confirmation Required
WRB product instructions	Manufacturer	Exposure limit, orientation, fastening schedule, and lap requirements confirmed current
Envelope specification	Design professional / plan set	Corner detail, foundation transition, and roof transition confirmed for each elevation
Project 01 envelope-readiness record	Prior project record	Confirmed proceed or conditional-proceed, with corrections complete
Window and door schedules	Design professional / plan set	Opening-flap method confirmed for each scheduled unit
Through-wall or base-flashing detail	Design professional / manufacturer	Confirmed before covering the lower wall transition
Change documentation	Design professional / general contractor	All approved field changes incorporated

C. Preparation Materials and Consumables

• WRB rolls: the approved product, inspected for damage, contamination, and correct identification before staging.
• Fasteners: approved cap fasteners or the manufacturer-specified fastening system, sized and spaced per the fastening schedule.
• Corner components: approved corner pieces, where specified, sized to the corner wrap distance required by the approved detail.
• Base flashing: through-wall or base-flashing material required at the lower wall termination before the first WRB course is installed.
• Patch material: WRB patch material approved by the manufacturer, for repairing tears, punctures, and misplaced fasteners.
• Documentation: one WRB installation record per structure or per elevation as required by the project specification.

D. Acceptance Standards

Check	Standard
Orientation	Printed or designated face outward on every course, on every elevation
Horizontal shingle lap	Every successive course overlaps the course below it by the dimension required in the approved WRB instructions, with no reverse laps
Vertical seam overlap	Every vertical seam meets the required overlap and stagger pattern from the approved detail
Fastening	Approved cap fasteners installed at the specified spacing, with no fasteners in prohibited flashing, opening, or drainage zones
Corner treatment	Every outside and inside corner wrapped by the required minimum distance or fitted with an approved corner piece
Transition continuity	WRB continuous and correctly lapped at every wall-to-foundation, wall-to-roof, porch, deck, and other identified transition
Opening treatment	Only the cuts required by the selected flashing sequence made at each opening, with head flaps preserved and secured without reverse lapping
Surface condition	Free of major wrinkles, folds, tears, punctures, and misplaced fasteners, or repaired using the approved patch method
Documentation completeness	Every lap, corner, fastener pattern, and transition photographed and recorded before seam treatment in Project 03

E. Document Review and Layout Planning (Steps 1–5)

1. Review the approved WRB product, exposure limits, orientation, fastening schedule, lap requirements, corner details, foundation transition, roof transition, and opening-flap method. Confirm the revision date of each document against the project's document-control log before using it.
2. Confirm that the wall readiness inspection has passed and that required structural components remain visible or documented. Verify the Project 01 envelope-readiness decision shows proceed or conditional-proceed with corrections complete.
3. Inspect WRB rolls for damage, contamination, weather exposure, and correct product identification. Set aside and do not install any roll showing tears, mold, or exposure beyond the manufacturer's storage limits.
4. Plan course direction, starting elevation, roll lengths, vertical seams, opening treatment, and temporary terminations. Dry-fit the layout on the wall and mark corner wrap points and opening boundaries before cutting the first roll.
5. Establish a level reference line at the approved lower-wall termination. Confirm the line is level across the full elevation with the 4-foot level before snapping it.

F. First Course and Base Transition (Steps 6–11)

1. Install required through-wall or base flashing before covering the lower transition. Confirm the base flashing extends over the foundation or lower termination as required by the approved detail.
2. Begin at the lowest course and orient the WRB with the printed or designated face outward. Verify orientation before fastening any portion of the course.
3. Align the first course to the reference line without stretching or distorting the sheet. Work from the center of the roll outward to avoid introducing wrinkles.
4. Fasten the WRB using approved cap fasteners or the manufacturer-specified method and spacing. Confirm fastener spacing against the fastening schedule at the start, middle, and end of the course.
5. Keep fasteners out of prohibited flashing, opening, and drainage zones. Mark these zones on the wall before fastening if they are not otherwise visible.
6. Wrap outside and inside corners by the required minimum distance or install approved corner pieces. Measure the wrap distance at the top, middle, and bottom of each corner.

G. Successive Courses, Seams, and Transitions (Steps 12–17)

1. Install successive courses above lower courses with the required horizontal shingle lap. Verify the lap dimension before fastening each course, not only at the start of the elevation.
2. Stagger or locate vertical seams according to the approved detail and provide the required overlap. Confirm no vertical seam falls within the corner wrap distance or opening boundary unless the approved detail permits it.
3. Maintain continuity at wall-to-foundation, wall-to-roof, porch, deck, and other transitions. Confirm the WRB laps correctly with any adjoining roof or deck flashing at each identified transition.
4. At window and door openings, make only the cuts required by the selected flashing sequence and preserve head flaps where applicable. Do not cut beyond the opening boundary marked during layout planning.
5. Temporarily secure opening flaps without reverse lapping or exposing the wall to uncontrolled rain. Fasten flaps only at locations that will not interfere with the flashing sequence in Project 4 or 7.
6. Install WRB around planned penetrations without oversized cuts. Cut only as large as the penetration requires, consistent with the penetration treatment planned in Project 01.

H. Repair, Inspection, and Documentation (Steps 18–22)

1. Smooth major wrinkles and folds that could trap water or interfere with cladding. Re-fasten any area where a wrinkle cannot be smoothed by hand.
2. Repair tears, punctures, and misplaced fasteners using the approved patch method. Extend every patch beyond the defect by the distance specified in the manufacturer's repair instructions.
3. Inspect every lap, corner, termination, opening, fastener pattern, and transition. Use the Acceptance Standards table to confirm each item before considering the elevation complete.
4. Photograph and document the completed WRB before seam treatment and flashing conceal critical details. Label each photograph with its elevation and location for later reference.
5. Protect the WRB from wind damage, prolonged exposure, and unnecessary traffic. Secure any loose flap or edge and note the coverage date on the WRB installation record before leaving the site.