Shingle Roof Vent Flashing and Pipe Boot Repair in Los Angeles

On June 12, 2025, Roof Repairs CA completed a multi-point shingle roof service at 4443 Lemp Ave, Los Angeles, CA. The homeowner contacted us after noticing discoloration around interior ceiling areas near multiple pipe vents. Upon arrival, we performed a full rooftop inspection and identified several pipe boots with worn seals and loose flashing that had deteriorated over time.

Some of the metal vent collars had significant rust, and the mastic sealant originally applied had cracked, creating entry points for water. We thoroughly cleaned each base, resealed with commercial-grade roof cement, and reinforced the areas with new flashing as needed. Each pipe and vent penetration was then layered and sealed correctly to ensure weatherproof performance moving forward.

Additionally, we inspected the chimney flashing and observed lifting where the flashing met the brick structure. We applied new mastic, smoothed transitions, and verified all edge bonding. The skylights also received a close review. Though intact, we added minor sealing to prevent premature degradation at the flashing edges.

Finally, we inspected and resecured ridge cap shingles, which had begun to show granule loss and curling in isolated areas. These efforts extend the life of the roof, prevent future leaks, and give the homeowner peace of mind as the rainy season approaches.

Pipe Boot and Vent Sealing

• Reapplied mastic and secured deteriorated pipe boot collars

• Rusted vents were resealed and coated for weather resistance

Skylight and Chimney Flashing Repairs

• Skylight flashing cleaned and sealed to block water intrusion

• Applied new roof cement at chimney-to-roof joint

Shingle Roof Maintenance

• Reinforced ridge caps to prevent wind lift and granule loss

• Checked field shingles for lifting or cracking

Inspection and Prevention

• Full review of vent pipes, skylights, and chimney

• Verified all penetrations were watertight post-repair