Mason Rivera

Mason Rivera built Roofing Materials Calculator after a decade of watching contractor bids and homeowner estimates miss real roof geometry by 10-30%. The platform exists to make every formula transparent — pitch multipliers, waste factors, slope-corrected area, and accessory line items — so estimates can be cross-checked instead of taken on trust.

His focus is straightforward: keep the math open, show every adjustment, and align outputs with how suppliers actually sell materials and how crews actually install them. Each calculator is reviewed against current NRCA guidance, IRC code requirements, and manufacturer specifications before publication.

Outside product work, Mason reviews feedback from roofing contractors, DIY users, and property managers to prioritize calculator updates. He also writes the long-form roofing guides on the blog, focusing on the parts of an estimate that homeowners and contractors most often get wrong.