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418 Cortland Avenue, Bernal Heights, San Francisco, CA 94110
A hillside home on Cortland Avenue in Bernal Heights had relied on its original clay tile roof for decades. While many of the tiles remained intact, the waterproof underlayment beneath had gradually deteriorated due to years of coastal fog, wind-driven rain, and temperature variation typical of San Francisco neighborhoods.
Cracked tiles were visible along the wind-exposed slope, and early signs of moisture began appearing near the attic line. After evaluating repair versus replacement options, the homeowner decided to transition from clay tile to architectural asphalt shingles to reduce structural weight and simplify long-term maintenance.
Royal Roofing CA completed a full clay tile tear-off and installed a new shingle roofing system designed for San Francisco climate conditions.
Project Address: 418 Cortland Avenue, Bernal Heights, San Francisco, CA 94110
Property Type: Hillside Single-Family Residential
Previous Roof System: Clay Tile Roof
New Roof System Installed: Architectural Asphalt Shingles
Service Provided: Full Tile Tear-Off & Roof Replacement
Primary Objective: Replace aging tile system with durable shingle roofing
The project focused on resolving underlayment deterioration, reducing roof load, and installing a fully integrated waterproof roofing system built for coastal exposure.
Homes in Bernal Heights experience:
Over time, these conditions contribute to underlayment breakdown beneath tile systems and flashing fatigue around roof transitions.
During inspection, Royal Roofing CA documented:
While the clay tiles provided surface coverage, the waterproof layer beneath had exceeded its functional lifespan.
Tile removal requires careful execution due to material weight and fragility.
All clay tiles were removed in a controlled sequence to protect the roof deck.
Existing battens and deteriorated waterproof membrane were removed to expose the structural deck.
The plywood deck was inspected thoroughly. Damaged sections were replaced to restore structural integrity.
With the heavy tile system removed, framing was reviewed prior to installing the lighter shingle roof.
Once preparation was complete, installation of the new roofing system began.
A waterproof synthetic membrane was installed across the entire roof surface.
New metal drip edge and flashing components were installed along valleys, penetrations, and roof perimeters.
Dimensional asphalt shingles were installed according to manufacturer fastening specifications to support wind resistance in hillside conditions.
Ridge ventilation components were installed to support attic airflow and regulate moisture buildup.
A complete system inspection confirmed proper shingle alignment, fastening integrity, and waterproof continuity.
For this roof conversion in Bernal Heights, Royal Roofing CA installed:
All materials were selected to perform under San Francisco coastal exposure and hillside wind conditions.
Following completion at 418 Cortland Avenue, Bernal Heights, San Francisco, CA 94110, the home now benefits from:
✔ Reduced roof weight
✔ Fully integrated waterproof roofing system
✔ Improved wind resistance
✔ Lower long-term maintenance requirements
✔ Updated architectural appearance
✔ Extended service lifespan
The transition from clay tile to architectural shingles provides durable protection while simplifying future upkeep.
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Improper tile removal and roof conversion can result in:
A structured tear-off and installation process protects framing and supports long-term roof performance in San Francisco’s hillside environments.
Royal Roofing CA provides clay tile tear-off and shingle roof installation services throughout:
If your clay tile roof shows signs of cracking, underlayment deterioration, or recurring leaks, converting to a modern architectural shingle system may provide long-term durability with simplified maintenance.