Grannis Roofing & Maintenance | Onia Roofing Services
Same-Day Appointments Available · 24/7 Emergency Service
Owens Corning Preferred Contractor. 20+ years experience. Free roof inspections in Onia.
Call (877) 586-1316Same-day estimates · GAF certified crews ready
If your Onia home needs a new roof or a repair, Grannis Roofing & Maintenance is the contractor to call. We're based in Grannis and our crews are in Onia every week, inspecting roofs, replacing shingles, and handling storm damage claims.
Our Services in Onia
What Onia Customers Say
"Hail punched through half our shingles last spring. Grannis Roofing & Maintenance handled the entire insurance claim — met the adjuster, filed the supplement, and we paid nothing out of pocket besides the deductible."
"Second roof Grannis Roofing & Maintenance has done for us. First one on our primary home, now our rental property. Same crew both times, same attention to detail. Drip edge, ice shield, everything by the book."
Why Onia Residents Choose Grannis Roofing & Maintenance
Free Inspections & Honest Estimates
We don't charge for inspections and we don't pad estimates. If your Onia roof needs a repair, we'll tell you. If it needs a replacement, we'll explain exactly why. No high-pressure sales, no scare tactics.
No Subcontractors
Every Onia roof is installed by our own trained crews, not subcontractors pulled from a labor pool. That means consistent quality, accountability, and a crew that knows our standards from the first nail to the last drip edge.
20+ Years of Experience
We've been installing and repairing roofs for over 20 years. That experience shows in how we handle complex roof lines, unexpected deck damage, and insurance claim disputes. We've seen everything and know how to handle it.
Manufacturer-Certified Installation
We hold certifications from GAF, Owens Corning, and CertainTeed. That means the manufacturers have trained and vetted our crews and will back our installations with their strongest warranties. Your Onia roof gets factory-level quality control.
About Our Onia Roofing Services
We've completed hundreds of roofing projects across Onia, from single-story ranch homes to multi-story commercial buildings. Every project gets a dedicated project manager, a written estimate before work starts, and a final walkthrough when we're done.
Ready to get your Onia roof handled? Call (877) 586-1316 for a free estimate. We respond to every inquiry within a few hours and schedule inspections within 48 hours, often sooner for storm damage situations.
Grannis Roofing & Maintenance is based in Grannis and our crews are in Onia regularly, typically multiple times per week. There are no travel fees for Onia jobs.