About & methodology
How Tools for Roofers builds and checks its tools
Deterministic planning tools that keep geometry, coverage, waste, rounding, and limitations visible.
Formulas and tested examples
Important calculations state whether dimensions are horizontal or sloped, show the formula and units, and use known examples checked against the same calculation code.
Product data
User-entered coverage and package values remain visible because products differ.
Limits
Outputs are planning estimates, not safe-access instructions, structural design, drainage design, code review, final takeoffs, bids, or purchase orders.
Editorial review
Dates change only after substantive review. No public corrections channel is configured and no contact identity is invented.