Failed underlayment beneath intact tile
Why it happens here
Sunnyside's older tile roofs are often on their second or third layer of tile over original underlayment. The underlayment dries out and cracks with age, but the tile on top still looks fine, so the problem stays hidden until water starts coming through.
Our approach
We use moisture meters and infrared detection to find failed underlayment before it causes visible damage. When we find it, we recommend a lift and relay rather than a full replacement, which saves you money and preserves the original tile.