Labor Productivity and Estimating Rates
Convert crew production into hours, cost per square, and schedule — and adjust for real job conditions.
Short answer
Productivity converts scope into hours. Divide quantity by crew production rate to get crew hours, multiply by crew size for labor hours, then apply the burdened rate. Adjust for access, complexity, height, weather, and crew experience.
01
The core conversion
Quantity divided by production rate gives duration. Duration multiplied by crew size gives labor hours. Labor hours multiplied by burdened rate gives labor cost.
Keeping those three steps separate makes errors easy to find.
02
Adjust for conditions, not optimism
Published or historical rates assume normal conditions. Real jobs vary.
- Roof complexity, cut-up geometry, and penetrations
- Height, access, and staging constraints
- Steep-slope safety requirements
- Tear-off layers and disposal logistics
- Heat, rain delays, and daylight
- Crew experience and supervision
03
Use your own history as the source of truth
Actual job-cost data from completed work is more reliable than any generic table because it reflects your crews, equipment, and market.
Build the feedback loop: estimate, record actuals, compare, adjust.
04
Productivity is also a schedule tool
The same numbers that price the job predict its duration, which drives crew loading, cash timing, and customer commitments.
Overcommitting the schedule is a cash-flow problem as much as a service problem.
Official-source check
Requirements, references, and testing procedures can change. Verify current details with Florida DBPR, the CILB, and the current exam vendor before acting.
Candidate questions
Frequently asked questions
Where do production rates come from?
Ideally your own historical job-cost data, supplemented by reference tables for unfamiliar work.
Should I use paid or productive hours?
Estimate with productive hours and account for non-productive time in burden.
How much should I adjust for complexity?
Base it on measured history for similar roofs rather than a fixed factor.