Chimney Valley Roof Repair Done the Right Way

Rain has a way of finding the one spot you least expect. On this job, the valley running alongside the chimney was the weak point - and once water gets a foothold there, it doesn't take long for the damage to spread into the deck below. That's exactly what we found when we opened it up.

The existing valley was shot. The plywood underneath had taken enough moisture over time that it needed to come out completely. We pulled the old material, replaced the damaged decking, and started fresh. No patching over problems - just a clean foundation to build the repair correctly.

From there, we layered it in the right order. GAF Storm Guard ice and water barrier went down first along the valley, giving that critical zone a fully self-adhered waterproof layer. Then roofing felt over the field, new battens set to a consistent layout, and a 5-rib metal valley on top. Every layer is doing a specific job, and together they keep water moving off the roof the way it's supposed to.

This is the kind of roof repair work that actually solves the problem instead of just hiding it. Valleys near chimneys are one of the most common spots for leaks because water from two roof planes converges right there - and chimneys create their own complications with flashing. When we rebuild a valley, we're thinking about long-term performance, not just getting the tiles back on.

If you've got a leak that keeps coming back, or you know you've got an older valley that's never been properly addressed, it's worth having someone take a look before it turns into a much bigger fix.