Envelope · Lic #1007864
Roofing Systems & Waterproofing
Composition, tile, and flat roofing systems with forensic leak diagnostics and full waterproofing.
JMG installs and repairs roofing systems built for California microclimates — from wind-rated composition shingles in the East Bay to clay tile estates in Saratoga and cool-roof flat systems on commercial corridors.
Our leak-detection protocols trace water intrusion to its source before we ever lift a shingle, saving owners from repeat repairs and interior damage.
Scope of delivery
Recent roofing projects
How it works
Private Consultation
Walk the property with owner Jerry Guinn. Honest scope, realistic timeline, and a written line-item estimate — free.
Design & 3D Rendering
See the finished project in photorealistic 3D before a single wall comes down. Finishes get locked before demo day.
Permits, Handled
Plans, submittals, corrections, and city or county coordination under CA License #1007864. You sign — we run the process.
Build & Final Inspection
Sixteen in-house trades on one schedule, one accountable owner. Inspection passed, walkthrough done, keys in hand.
Roofing — frequently asked questions
Most composition-shingle re-roofs run three to five working days; tile and flat systems run longer. We tear off only what we can dry-in the same day — your home is never left open overnight.
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Request roofing consultation
Roofing by city