Lic #1007864 · Contra Costa County · Envelope
Roofing Systems & Waterproofing
Composition, tile, and flat roofing systems with forensic leak diagnostics and full waterproofing.
The East Bay's retail capital — Broadway Plaza-caliber tenant improvements, striping, and luxury home upgrades in the surrounding hills.
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.
In Walnut Creek and across Contra Costa County, JMG delivers roofing under California Contractor's License #1007864 — permitted, inspected, and personally overseen by owner Jerry Guinn. Our leak-detection protocols trace water intrusion to its source before we ever lift a shingle, saving owners from repeat repairs and interior damage.
Walnut Creek pairs a high-traffic downtown retail core with hillside neighborhoods in Saranap and Northgate. Retail refreshes downtown demand night work and zero downtime; hillside homes demand fire-safe materials and defensible-space detailing. JMG crews handle both on one schedule.
What's included in Walnut Creek
Recent roofing work
The process in Walnut Creek
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 in Walnut Creek — FAQ
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.
More services in Walnut Creek
Roofing in other cities
Roofing · Walnut Creek