Solder-Rivet-Seal Valley Flashing
on March 26, 2014
Recently the valley between my house and garage roof leaked. It is galvanized and less than two years old. A seam that was soldered has come apart. Do you recommend re-soldering, or should I seal it with a quality silicone seal?
Don’t silicone! Re-soldering is definitely in order, but with an extra ounce of prevention. Metal has a tendency to expand and contract with changes in weather conditions. Thoroughly clean the area down to bare metal. Drill 1/8-inch diameter holes every six inches along the seam where the pieces overlap each other. Purchase a pop-rivet kit from your local hardware store (about $15) and install a pop-rivet in each hole. Finally, re-solder along the old seam and at each pop-rivet. Remember: Rust, paint, oil and other debris will prevent a proper connection. The key here is to use a torch-heated soldering iron. Heat from direct flame could be dangerous.