Colophon. RoofHelm is set in Fraunces and Inter. The snow load engine computes ASCE 7-22 balanced, minimum, rain-on-snow and §7.6.1 unbalanced roof loads for planning and checking; the pitch, rafter, truss, joist, insulation, HVAC and cost calculators use the real-formula engines documented on each calculator page. The governing ground snow load comes from the ASCE 7 Hazard Tool or your building department, and drift, sliding and code-table cases must also be reviewed. Confirm with a licensed engineer or contractor before you build or submit. © 2026 RoofHelm.