The job starts with a complete tear-off of the existing roofing material. Once the deck is exposed, the roofer inspects every section for soft spots, rot, and water-stained sheathing. Damaged decking is replaced before anything else proceeds. In Glendale’s older single-family neighborhoods, hidden deck damage under worn shingles is common enough that this step can affect the final scope. You are notified of any additional deck work before it is carried out.
With a clean, sound deck confirmed, underlayment goes down first, typically a synthetic felt layer, with ice and water shield added at eaves and valleys. Architectural asphalt shingles are then installed in overlapping courses with a manufacturer-specified nailing pattern. Vent installations are set into the field of the roof before the upper courses are completed, ensuring a weathertight seal around each penetration.
Flashing is installed at every wall junction, chimney base, and skylight frame. Drip edge is set along the eaves and rakes to direct water away from the fascia. The ridge cap is the final roofing component, sealing the peak and completing the weather barrier. Glendale’s monsoon-season wind and rain make underlayment and flashing quality especially consequential. After cleanup, a walkthrough confirms the finished installation matches the agreed scope.