Install Roof Sheathing

A. Finished-Project Specification

Scope: one completed structural roof deck covering the full approved rafter or truss roof system, including all required panel courses, staggered joints, edge-support components, fastening, framed openings, and a signed roof-sheathing record.

B. Required Documentation Schedule

Document	Source	Confirmation Required
Roof-sheathing plan	Design professional / plan set	Current revision on site
Panel product data	Manufacturer	Thickness, span rating, and orientation confirmed against the plan
Fastening schedule	Design professional / adopted code	Edge, boundary, and field fastener type and spacing confirmed
Edge-support detail	Design professional / manufacturer	Clip or blocking method confirmed for unblocked panel edges
Roof-framing inspection approval	Authority having jurisdiction	Confirmed complete before sheathing begins
Ventilation and opening details	Design professional / adopted code	Location and size confirmed before cutting

C. Layout Materials and Consumables

• Panel product: quantity, thickness, span rating, and orientation as specified on the approved sheathing plan.
• Edge-support components: panel clips or blocking as specified for every unblocked panel edge identified on the plan.
• Fasteners: type, diameter, and length specified by the approved fastening schedule, in sufficient quantity for the edge, boundary, and field zones.
• Documentation: one roof-sheathing record per roof section.

D. Acceptance Standards

Check	Standard
Panel orientation	Matches the span-rating direction specified by the panel manufacturer and the approved plan for every panel
Panel-edge and end-joint gaps	Match the gap specified on the approved sheathing plan at every panel
Staggered joints	No continuous end-joint line runs across more than one course
Edge support	Every unblocked panel edge is supported by the specified clip or blocking before adjacent panels close access
Fastener installation	Matches the approved edge, boundary, and field schedule for type, spacing, and seating; no overdriven or missed-framing fasteners
Openings	Located and sized only from confirmed dimensions on the approved plan; structural corners and boundary elements not cut

E. Preparation and Site Readiness (Steps 1–5)

1. Review the roof-sheathing plan, panel type, thickness, span rating, orientation, edge clips or blocking, fastening zones, openings, and diaphragm details. Confirm the revision date against the project's document-control log before using it.
2. Confirm the roof framing has passed inspection and temporary and permanent bracing are complete for this stage. Record the inspection date, inspector, and approval reference on the roof-sheathing record.
3. Inspect rafters or trusses for spacing, alignment, damage, connector completion, and approved repair status. Log and refer any condition that does not match the approved framing plan before staging panels.
4. Verify fall protection, roof access, material-staging limits, weather conditions, and ground exclusion zones. Confirm the current forecast permits roof work before staging begins.
5. Stage panels so they cannot slide, overturn, overload framing, or obstruct safe access. Distribute panel stacks across multiple bays rather than concentrating the load over a small framing area.

F. Course Layout and Panel Preparation (Steps 6–10)

1. Establish the first-course reference line parallel to the eave. Strike the chalk line at the eave overhang dimension specified on the approved plan, measured from a defined reference face.
2. Plan panel courses, staggered joints, supported edges, ridge spacing, rake overhang, and openings. Mark the planned course layout on the field copy of the plan before cutting any panel.
3. Confirm that panel orientation follows the span-rating direction. Verify the orientation marking on the panel face matches the approved plan before the first cut.
4. Measure and cut the first panel using ground-based or protected cutting methods where practical. Label the cut panel with its course and position before moving it to the roof.
5. Place the first panel with the required eave and rake alignment. Align the panel edge to the reference line struck in Step 6 and to the rake overhang dimension at the gable end.

G. Panel Installation and Fastening (Steps 11–16)

1. Maintain panel-edge and end-joint gaps. Use the gap dimension specified on the approved sheathing plan at every edge and end joint as panels are placed.
2. Temporarily secure the panel and recheck square and overhang. Confirm the panel edge remains aligned to the reference line before driving the full fastening pattern.
3. Fasten the panel using the approved edge, boundary, and field schedule. Keep fasteners centered in framing and seated flush without crushing the panel face.
4. Install edge clips or blocking where required before adjacent panels close access. Confirm every unblocked edge on the current course receives its specified support before the next course begins.
5. Install subsequent panels with staggered end joints and supported edges. Offset end joints from the previous course by the pattern specified on the approved plan.
6. Maintain controlled footing and never step on unsecured or unsupported panels. Confirm each panel is fully fastened before shifting worker weight onto it for the next course.

H. Openings, Inspection, and Closeout (Steps 17–24)

1. Cut roof openings only after verifying their location and required framing. Confirm each opening dimension against the approved plan before cutting.
2. Install sheathing around ridges, valleys, overhangs, chimneys, skylights, and vents according to approved details. Maintain required clearances and edge support at every penetration.
3. Maintain required ridge ventilation slot or other openings without cutting structural members. Verify the slot width against the approved plan before cutting.
4. Inspect fastener spacing, seating, missed framing, overdriving, panel gaps, edge support, and damaged surfaces. Record findings on the roof-sheathing record as each course is completed.
5. Correct loose panels, unsupported joints, damaged panels, or incorrect fasteners using approved repairs. Do not conceal an uncorrected deficiency under underlayment or roofing material.
6. Clear loose fasteners, sawdust, offcuts, and slip hazards from the roof. Clear continuously during installation and again at project closeout.
7. Protect the completed deck from weather until the roofing underlayment is installed. Cover exposed panel areas as required by the approved sequence and current weather conditions.
8. Record panel product, layout, fastening, gaps, openings, repairs, and inspection results. Complete the roof-sheathing record before this project is signed off.