Clay tile roofs are prized for their durability and aesthetic appeal, but valley leaks can still occur, often due to how valleys handle water flow. Valleys are where two roof slopes meet, channeling a lot of water during rain. Clay tiles are heavy and curved, meaning water must be carefully directed under them and down the valley without getting trapped. Leaks typically happen when flashing – the protective metal lining beneath tiles in valleys – is damaged, improperly installed, or corroded, or when tiles crack or shift, allowing water underneath. Diagnosing leaks from valleys can be tricky but you can do some safe, basic checks: look for cracked or displaced tiles along the valley, clean out debris that might be holding water, and inspect the attic for water stains that align with valleys during or after rain. Using a garden hose on a dry day, carefully spraying water from the bottom of the valley upward can simulate rain and help spot leaks.
If you find obvious damaged tiles or suspect flashing issues beyond minor debris, it’s best to call a professional roofer. Valley flashing needs to be installed correctly, often as stepped or woven metal installed beneath tiles to keep water flowing out instead of in. When speaking with a contractor, ask if they will inspect and possibly replace flashing using corrosion-resistant metals like aluminum or copper, and whether they can confirm their work won’t void any existing tile warranty. Also ask how they will ensure proper tile alignment and replacement to prevent future water intrusion. Proper diagnosis and repairs prevent small leaks from causing costly interior damage, and professionals can provide long-term solutions tailored to your clay tile roof’s specific valley design.