How to read a roof report
Start with the roof plan, review area and pitch, then check sources and limitations before discussing the work.
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How to Read a Measurement Report & Facet Ledger
Start with the report identity, the area basis and the evidence. Then follow the measurements into the details.
RoofKarma resource library · Updated
See it before you start.
A short guide to reading the report and knowing what to ask next.
Confirm the property and report version
Check that the building, report identity and version match the work you are planning. Synthetic samples are labeled and never describe a real customer property.
Read the units and area basis
A roofing square is 100 square feet of roof surface. Apply a pitch adjustment only when converting horizontal projected area to sloped surface area.
Follow the facet ledger
Each planar roof section has its own identity, area and pitch where supported. Match ledger labels to the plan and, for mixed pitches, calculate each facet separately.
How do edge lengths become material quantities?
Eaves, rakes, ridges, hips and valleys have different roles. Use their classified lengths with the selected material system, installation details and separately identified accessories.
Synthetic example: 120 linear ft of an applicable edge divided by a hypothetical 10 linear ft of usable coverage per piece is 12 pieces before project-specific cuts. Use the actual product’s usable coverage after required laps, then round up to whole purchase units; never assume nominal piece length equals installed coverage.
| Report quantity | Material planning use | Check before purchase |
|---|---|---|
| Facet area (sq ft) | Field shingles and underlayment | Surface basis, waste scenario and product coverage |
| Eave / rake (linear ft) | Starter and edge metal | Applicable edges, laps and installation instructions |
| Hip / ridge (linear ft) | Cap shingles and eligible ridge vents | Separate cap coverage; ventilation design |
| Valley (linear ft) | Valley lining or flashing | Open or closed valley system and lap requirements |
| Wall junction (linear ft) | Step or headwall flashing | Wall detail, pieces, exposure and overlaps |
Check sources before using the result
Review capture dates, confidence reasons, missing evidence and exclusions. An illustrative material list is a planning example; supplier ordering requires reviewed products, quantities and SKU mappings.
YOUR ROOF. YOUR NEXT STEP.
Check your property