Praktische Tools für exaktes Arbeiten
Akkordlohn-Rechner für Dacharbeiten
Berechnen Sie Arbeits- und Materialkosten je Square für Dacharbeiten aus Dachfläche, Akkordsatz, Teamkapazität und Verschnittfaktor.
Labor pay per 100 sq ft (one "square") of actual roof area.
Shingles/underlayment/fasteners per square. Leave at 0 for labor-only.
Piece-rate labor is paid on actual roof squares; the waste factor applies to material only, since crews aren't paid extra for material that ends up as offcuts.
How it works
How to use it: enter the roof's actual area (not including waste), your piece-rate pay per square (100 sq ft), the crew's realistic daily output, and material cost per square if you want a full job total rather than labor alone.
Calculation. Squares = roof area ÷ 100. Labor cost = squares × piece rate. Material cost = squares × (1 + waste %) × material cost per square - waste applies here because you buy extra material to cover cuts and overlaps, but piece-rate labor is paid on the roof's actual covered area, not the material purchased.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Roof area
- 2500 sq ft
- Piece rate
- 60 $/square
- Crew daily capacity
- 12 squares/day
- Material cost
- 110 $/square
- Material waste factor
- 10 %
Primary result: Total job cost: 4525.00 $.
Before using the result
- Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
- Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
- When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.
Limitations
This does not account for steep-roof or complexity premiums (many piece-rate agreements pay more per square above a certain pitch, or for cut-up roofs with lots of valleys/hips), tear-off of existing roofing, or disposal costs - add those as a separate line item.
Frequently asked questions
Should I use the roof's plan area or its actual (sloped) area?
Use the actual sloped roof area - multiply the building's plan (footprint) area by the roof pitch multiplier first if you're starting from a plan measurement, since piece rate and material are both based on the material actually covering the slope.
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