Repair Damaged House Wrap, Flashing, and Siding

A. Finished-Project Specification

Scope: one completed localized repair covering the defined repair opening on the affected wall elevation, including WRB, flashing, rainscreen, siding, trim, and designated sealant joints within that opening.

B. Required Documentation Schedule

Document	Source	Confirmation Required
Available wall-assembly records	Original installation project records	Reviewed for original WRB, flashing, and siding products and details
Leak or damage history	Owner, general contractor, or prior inspection report	Confirmed and compared against the visible damage location
Product information	WRB, flashing, siding, and sealant manufacturers	Confirmed compatible with existing materials
Repair-scope limits	Design professional / general contractor	Confirmed before removal begins
Hazardous-material requirements	Site hazard assessment	Confirmed for mold, contamination, or specialized handling

C. Preparation Materials and Consumables

• WRB patch material: compatible with the existing WRB, limited to repairing tears, punctures, and damaged areas identified within the repair opening.
• Flashing replacement materials: flashing tape, liquid flashing, or preformed flashing components matching the original detail's lap order and dimensions.
• Siding and trim: matching product where available, or an approved substitute confirmed compatible with the surrounding cladding.
• Fasteners: matching the original fastening schedule for the siding, trim, and flashing being reinstalled.
• Sealant: approved product limited to the designated joints identified in the original or approved repair detail.
• Documentation: one repair record per repair opening, including before, during, and after photographs.

D. Acceptance Standards

Check	Standard
WRB continuity	Patched area extends the required distance beyond the defect and laps correctly with surrounding WRB
Flashing order	Replaced sill, jamb, head, penetration, or transition flashing installed in bottom-to-top water-shedding order
Rainscreen and drainage	Furring, drainage mat, insect screen, and mounting support restored and drainage paths unobstructed
Siding and trim alignment	Reinstalled components match surrounding course lines, exposure, and joint pattern within the original layout tolerance
Sealant joints	Sealant installed only at designated joints, with drainage openings left clear
Documentation completeness	Removed materials, discovered cause, repair layers, photographs, and reinspection results recorded on the repair record

E. Records Review and Damage Identification (Steps 1–5)

1. Review available wall-assembly records, leak history, product information, repair limits, and hazardous-material requirements. Confirm the original WRB, flashing, and siding products before selecting replacement materials.
2. Identify the visible damage, suspected water path, affected elevation, and boundaries of the proposed opening. Mark the proposed repair opening on the wall before any removal begins.
3. Inspect interior and exterior conditions for active leakage, mold, rot, structural damage, electrical hazards, and contamination. Check the interior wall surface and framing where accessible for staining or softness corresponding to the exterior damage location.
4. Stop work and obtain qualified assessment when damage extends beyond the minor-repair scope. Do not proceed with removal in an area where structural damage, active mold, or contamination is confirmed.
5. Protect the work area, landscaping, occupants, and interior finishes from debris and weather. Install protective sheeting and secure the perimeter of the work area before beginning removal.

F. Controlled Removal (Steps 6–9)

1. Document existing siding courses, trim, joints, fastener locations, and color before removal. Photograph each course and joint from a consistent reference distance and angle.
2. Remove sealant only where necessary to release components. Cut sealant bonds cleanly without damaging adjacent siding, trim, or flashing.
3. Remove siding or trim in reverse installation order without unnecessarily damaging reusable pieces. Work from the last-installed component toward the first, releasing fasteners before prying.
4. Label and store reusable components in installation order. Mark each piece with its course and location for reinstallation.

G. Diagnosis and Substrate Preparation (Steps 10–13)

1. Expose enough WRB and flashing to identify the full defect and required shingle-lap repair area. Extend the opening beyond the visible damage if the water path is not yet fully accounted for.
2. Trace staining, punctures, open laps, failed adhesion, reverse flashing, blocked drainage, or missing components. Follow the water path from the point of entry to the point of visible damage and document each defect found along the way.
3. Remove wet, contaminated, incompatible, or failed repair materials. Do not reinstall a material that has failed once already at this location.
4. Dry and clean the substrate to the conditions required by the repair products. Confirm moisture content and surface cleanliness against the WRB and flashing manufacturer's application requirements before proceeding.

H. Layer Repair and Restoration (Steps 14–19)

1. Repair WRB tears using an approved patch that extends beyond the defect and laps correctly with surrounding layers. Confirm the patch orientation sheds water onto the surrounding WRB rather than behind it.
2. Replace sill, jamb, head, penetration, or transition flashing in bottom-to-top water-shedding order. Reproduce the original detail's lap sequence and overlap dimensions.
3. Restore rainscreen furring, drainage mat, insect screen, and mounting support. Confirm the restored drainage gap matches the original detail before covering it with siding.
4. Reinstall siding and trim using compatible fasteners, required gaps, clearances, and joint treatment. Match the original exposure, course lines, and joint pattern documented before removal.
5. Replace components that cannot be reinstalled within tolerance. Do not force a damaged or distorted component back into service to avoid sourcing a replacement.
6. Restore designated sealant joints while leaving drainage openings clear. Apply sealant only at the joints identified in the original detail or approved repair specification.

I. Inspection, Testing, and Documentation (Steps 20–22)

1. Inspect the repair for continuity, drainage, cladding alignment, fastening, and surface damage. Compare the completed repair against the Acceptance Standards table before considering it complete.
2. Conduct the approved localized observation or test after cure conditions are met. Follow an approved protocol with defined stop conditions and interior monitoring where required; do not represent this test as proof that the entire building is watertight.
3. Document removed materials, discovered cause, repair layers, photographs, and reinspection results. Complete the repair record before the repair opening is considered closed.