Inspect skylight frame installation and anchorage defines a rigorous, field-ready inspection process for roof skylight frames, anchorage, and curb interfaces, aimed at site supervisors, QA inspectors, and installers.
- Confirm curb condition, frame geometry, and anchor layout meet drawings
- Verify torque, embedment, and edge distances for structural performance
- Ensure corrosion isolation and continuous weather seals for durability
- Interactive, commentable checklist with export and QR code verification
The checklist
Pre-Inspection & Safety
- Verify latest approved drawings, submittals, and method statements are on hand; cross-check revision numbers and dates against the document register; record document IDs and obtain supervisor acknowledgment signature.
- Confirm safe access and fall protection: inspect guardrails, lifelines, and harness certification; acceptance: compliant equipment within inspection date; capture photos and safety officer sign-off.
- Check weather conditions: roof surface dry, ambient 5–35 °C, sustained wind < 10 m/s before sealant/adhesive work; record thermometer, hygrometer, and anemometer readings with time-stamped photos.
Substrate & Curb Condition
- Measure roof opening and curb outside dimensions with a steel tape/laser; acceptance: within ±5 mm of drawings; capture measurements on photo markups and note any deviations for approval.
- Verify curb level and plumb using a 600 mm spirit level; acceptance: level within ±2 mm/m and plumb within ±2 mm/m; record bubble photos and measurement notes.
- Inspect curb attachment to deck/structure: expose sample fasteners, measure spacing and pattern; acceptance: as per approved drawings (e.g., ≤ 200 mm spacing); photo evidence and spacing log required.
- Probe substrate around opening for decay, delamination, or corrosion using a pick and hammer tap; acceptance: sound, intact substrate; photograph any defects and record corrective actions.
- Confirm air/vapor barrier continuity at curb intersections; acceptance: no gaps, tears, or unsealed penetrations; photo documentation of all corners and laps after repair, if any.
Frame Installation Geometry
- Dry-fit the skylight frame onto the curb; verify uniform bearing and clearance to roofing; acceptance: no binding; take overview photos and annotate intended shim locations.
- Check frame squareness by measuring diagonals and lengths; acceptance: diagonal difference ≤ ±3 mm and length within ±2 mm; record actual values on a marked photo.
- Level the frame using non-compressible shims at corners and mid-spans; acceptance: level within ±2 mm/m; photograph shim type/locations and retain packaging for material traceability.
- Verify thermal break continuity across joints; acceptance: no gaps or metal-to-metal bridges; capture close-up photos before closure and note any corrective sealing.
Anchorage & Fasteners
- Confirm anchor/fastener type, size, coating, and grade match approved submittals; acceptance: exact specified product; photograph box labels and record lot/batch numbers.
- Lay out fastener spacing per drawings; measure edge distances from frame/curb; acceptance: edge distance ≥ 40 mm, spacing as specified (e.g., ≤ 150 mm); record measurements on layout sketch.
- Drill pilot holes where required using manufacturer’s bit size; verify embedment depth with a depth gauge; acceptance: ≥ 35 mm or per specification; log depth readings and hole cleanliness photos.
- Install anchors and torque fasteners with a calibrated torque wrench; acceptance: manufacturer-specified torque (e.g., 8–12 N·m); record serial number, calibration date, and individual torque readings.
- Conduct on-site pull-out tests where required; acceptance: ≥ design capacity per approved project specifications and authority requirements; attach test report and photos of gauge readings.
Corrosion Protection & Isolation
- Verify corrosion resistance class of fasteners/coatings against environment category; acceptance: matches specification; capture product data excerpts and installation photos.
- Install isolation pads or tapes between dissimilar metals (e.g., aluminum/steel); acceptance: full contact coverage with no wrinkles; photo evidence at each interface.
- Touch up cut edges, drill points, and exposed heads with zinc-rich coating; acceptance: continuous coverage, dry film thickness per datasheet; before/after photos and batch number recorded.
Sealing, Interface & Closeout
- Size joints and backer rods correctly; acceptance: 2:1 width-to-depth ratio, minimum joint width 10 mm; photograph backer rod diameter checks and placements.
- Apply sealant continuously and tool for adhesion to two sides; acceptance: no voids, pinholes, or skips; capture close-ups with date stamp and sealant lot number.
- Verify frame-to-roof waterproofing interface: counterflashing/curb flashing shingle-lapped ≥ 75 mm; acceptance: no fishmouths or unsealed terminations; take wide and detail photos.
- Compile as-built photos, torque logs, test results, and approvals; acceptance: all checklist items closed with signatures; export PDF/Excel with QR code and distribute to stakeholders.
Preview the printable checklist
Preview page one below. Open the image or download the PDF for all pages.
At a glance
- Verify skylight frames are level, plumb, and square, with shims and thermal breaks correctly installed. Confirm curb integrity, barrier continuity, and proper fit before fastening to prevent racking, leaks, and premature wear.
- Validate anchor selection, layout, and torque against approved submittals. Record edge distances, embedment depths, and pull-test results where required to demonstrate resistance to wind uplift and service loads with auditable evidence.
- Confirm corrosion protection and electrical isolation between dissimilar metals. Seal all joints to manufacturer requirements, tooling for adhesion and continuity, and document roof interface laps to prevent water ingress over the service life.
- Interactive online checklist with tick, comment, and export features secured by QR code. Capture photos, lot numbers, torque logs, and sign-offs, then generate a time-stamped report for QA and compliance distribution.
How to Use This Skylight Frame Inspection Checklist
- Preparation: Gather approved drawings/submittals, calibrated tape/laser, spirit level, torque wrench, depth gauge, anemometer, thermometer/hygrometer, camera, PPE, and sealant/backer data. Ensure safe roof access and fall protection.
- Open the interactive checklist on your device, select project and location, and enable offline mode if needed. Add the reviewers and recipients for automated report distribution.
- Conduct field checks in order of sections. Tick each item, enter measured values, and attach labeled photos (overall and close-ups) directly to the corresponding step.
- Use comments to flag nonconformances, assign actions with due dates, and reference drawing details. Recheck and close items once corrective work is verified.
- Export the completed log to PDF/Excel, including photos, torque logs, and test reports. The export embeds a QR code for authenticity and quick retrieval on site.
- Sign-Off: Capture digital signatures from the installer, inspector, and supervisor. Share the report with stakeholders and archive it per project record-keeping requirements.
Plan the Inspection and Control Site Conditions
Successful skylight frame inspections begin with controlled conditions and complete documentation. Confirm you have the latest approved drawings, submittals, and method statements before stepping onto the roof. Verify safe access and fall protection, then assess the weather: a dry substrate, moderate temperature, and manageable wind preserve sealant performance and fastener accuracy. Early measurement of the roof opening and curb ensures the frame will seat without binding, while checks on air/vapor barriers and curb attachment reveal hidden risks. These steps prevent rushed rework later, protect warranties, and maintain a clean audit trail. Capture evidence—photos of instruments displaying readings, labels on fastener boxes, and signatures acknowledging conditions. Use a simple measurement sketch to store tape and diagonal values. By front-loading control points, the remainder of the inspection focuses on geometry, anchorage, and sealing rather than troubleshooting preventable site issues.
- Always verify revision numbers before field use
- Record weather readings with time-stamped photos
- Measure and mark curb dimensions and level/plumb
- Check barrier continuity at corners and laps
- Log safety checks and supervisor acknowledgment
Validate Geometry, Shimming, and Anchorage Performance
Geometry and anchorage determine how the skylight resists wind, thermal movement, and live loads. Dry-fit the frame and confirm uniform bearing. Measure diagonals, lengths, and level, then shim with non-compressible materials to meet tolerances without crushing over time. Select anchors per the approved submittal, confirm edge distances to avoid splitting, and verify embedment depth for reliable pull-out capacity. Use a calibrated torque wrench to reach manufacturer values and record each reading. Where specified, perform on-site pull tests and attach the report. Thermal breaks must remain continuous to prevent bridging and condensation. Each step reduces the risk of frame racking, water entry at fastener lines, or uplift failures in storms. Document lot numbers, drill size, torque tool serials, and actual measurements to produce defensible records that withstand QA audits and warranty reviews.
- Diagonal difference ≤ ±3 mm; level within ±2 mm/m
- Edge distance ≥ 40 mm, spacing per drawings
- Embedment depth verified with a gauge
- Record torque with calibrated wrench details
- Maintain continuous thermal breaks
Protect Against Corrosion and Seal the Weather Interface
Durability hinges on isolating dissimilar metals, protecting exposed cuts, and building a robust water seal. Verify the corrosion resistance of fasteners and coatings matches the site’s environmental category. Install isolation tapes or pads to prevent galvanic action between aluminum frames and steel or concrete anchors. Touch up all exposed metal areas with zinc-rich coatings to datasheet requirements. Set backer rods to size joints correctly, then place and tool sealant continuously to bond to two sides without voids. At the roof interface, ensure counterflashing and curb flashing are shingle-lapped and neatly terminated. These practices stop early staining, corrosion, and leaks, protecting interior finishes and insulation. Finish by capturing close-ups of the joint profile, sealant batch labels, and overall perimeter photos for a comprehensive record that supports closeout and future maintenance.
- Isolate dissimilar metals with pads or tapes
- Touch up exposed metal with zinc-rich coating
- Size joints 2:1 width-to-depth ratio
- Tool sealant; no pinholes or skips
- Verify shingle laps ≥ 75 mm at interfaces
