Contact RoofCal

Found a bug, a wrong conversion, or a guide that needs updating? Corrections matter most to us — a calculator that's off by a degree is a problem worth fixing fast.

What to include

• Calculation bugs: the inputs you entered, the result you expected, and what the calculator showed.
• Content corrections: the page URL, the statement in question, and the source (code section, manufacturer instruction) if you have it.
• Feature requests: what you were trying to work out and what units or outputs were missing.

We read everything, but we can't respond to every message or take on individual projects. For structural decisions, always consult a licensed contractor or engineer — see our terms of use.