TryBuildCalc

Asphalt Shingle Roofing Verification Checklist

Essential Checklist+

Complete these critical checks before approving the work or proceeding to the next construction stage.

✓10 Inspection Points
✓4 Verification Categories
✓Layout & Material Selection Inputs+
  • Roof area (or footprint and actual pitch) confirmed from a field measurement, satellite measurement tool, or roofer's report, not a guess
  • Entered roof pitch (rise/12) matches the roof's actual measured pitch, not an assumed default
  • Roof Complexity selection genuinely matches the roof's actual shape (simple gable vs. hip/valley vs. multiple dormers), not defaulted to Simple to save on waste
  • Roof pitch confirmed at or above 2/12 (IRC R905.2.2's minimum for asphalt shingles) — and if between 2/12 and 4/12, that the calculator's automatically-doubled underlayment quantity actually matches your local code and manufacturer's specific application method
  • Local building code and wind zone requirements checked for required nailing pattern, underlayment type, and ice & water shield extent
✓Underlayment & Ice & Water Shield Preparation+
  • Roof deck inspected for soundness (no soft/rotted sheathing, proper nailing pattern) before any underlayment goes down
  • Ice & water shield (if required) actually installed to the LOCAL CODE-REQUIRED extent at eaves and valleys, not just this calculator's simplified 6 ft eave / 3 ft valley planning swath
✓Shingle & Flashing Installation+
  • Starter strip installed along BOTH eaves and rakes (not eaves alone), with the correct adhesive-strip orientation toward the roof edge
  • Actual nailing pattern installed (4-nail standard or 6-nail high-wind) matches what this takeoff assumed, in the correct nail placement zone per the shingle's nail line
✓Ridge, Ventilation & Final Walkthrough+
  • Ridge vent slot (if a ventilated ridge is used) cut to the manufacturer's specified width BEFORE ridge cap installation, not skipped or oversized
Full QC Checklist+

Verify layout/material inputs, underlayment and ice & water shield preparation, shingle and flashing installation, and ridge/ventilation and final walkthrough.

✓21 Inspection Points
✓4 Verification Categories
✓Layout & Material Selection Inputs+
  • Roof area (or footprint and actual pitch) confirmed from a field measurement, satellite measurement tool, or roofer's report, not a guess
  • Entered roof pitch (rise/12) matches the roof's actual measured pitch, not an assumed default
  • Roof Complexity selection genuinely matches the roof's actual shape (simple gable vs. hip/valley vs. multiple dormers), not defaulted to Simple to save on waste
  • Roof pitch confirmed at or above 2/12 (IRC R905.2.2's minimum for asphalt shingles) — and if between 2/12 and 4/12, that the calculator's automatically-doubled underlayment quantity actually matches your local code and manufacturer's specific application method
  • Local building code and wind zone requirements checked for required nailing pattern, underlayment type, and ice & water shield extent
  • Chosen shingle product's actual bundles-per-square, shingles-per-square, starter strip, and ridge cap coverage-per-bundle confirmed against the product wrapper, not left at this calculator's default assumptions
✓Underlayment & Ice & Water Shield Preparation+
  • Roof deck inspected for soundness (no soft/rotted sheathing, proper nailing pattern) before any underlayment goes down
  • Ice & water shield (if required) actually installed to the LOCAL CODE-REQUIRED extent at eaves and valleys, not just this calculator's simplified 6 ft eave / 3 ft valley planning swath
  • Underlayment courses overlapped per the product's minimum spec (commonly at least 2 in side laps, 4 in end laps) and shingled correctly (upper course over lower), not butted or reversed
  • Drip edge installed UNDER underlayment at eaves and OVER underlayment at rakes, per standard sequencing, not the same way on all four edges
  • Step flashing, chimney flashing, and pipe boot flashing planned for every wall intersection, chimney, and roof penetration — not assumed covered by shingles and underlayment alone
✓Shingle & Flashing Installation+
  • Starter strip installed along BOTH eaves and rakes (not eaves alone), with the correct adhesive-strip orientation toward the roof edge
  • Actual nailing pattern installed (4-nail standard or 6-nail high-wind) matches what this takeoff assumed, in the correct nail placement zone per the shingle's nail line
  • Shingle courses kept straight (chalk-lined) with cutouts/joints properly offset course-to-course per the manufacturer's stagger pattern
  • Valley installation method (open metal valley, closed-cut, or woven) confirmed and consistently applied — not mixed mid-valley
  • Installation timing/temperature considered for the shingle's self-sealing adhesive strip to properly activate (or hand-sealed if installed in cold weather)
✓Ridge, Ventilation & Final Walkthrough+
  • Ridge vent slot (if a ventilated ridge is used) cut to the manufacturer's specified width BEFORE ridge cap installation, not skipped or oversized
  • Ridge cap nails long enough to fully penetrate both the cap shingle and the roof deck at the ridge, not sized the same as field-shingle nails by default
  • Roofing debris (old shingles, nails, granules) cleared from gutters, downspouts, and the ground perimeter before job completion
  • Attic checked for leaks or daylight after the first significant rain following installation, not assumed watertight from the ground-level appearance alone
  • Manufacturer warranty registration completed (if offered) with the actual installed product, nailing pattern, and installer information on file
Inspection Notes+
Use the latest approved drawings, specifications, and site measurements.
Complete all critical checks before proceeding to the next work stage.
Record deviations and confirm rectification where required.

Related Calculators & Guides

Asphalt Shingle Roofing CalculatorOpen the related calculator and verify the current project inputs.

FAQ

Use it after collecting the project inputs and again before approving or closing the relevant work stage.
No. It supports verification but does not replace approved drawings, specifications, codes, manufacturer requirements, or professional inspection.