Valley Leak Repair and Decking Replacement
Project Overview
Repaired a recurring valley leak on a 1970s split-level in Passaic. Staining on the living room ceiling traced back to a metal valley that had corroded through in two spots.
Analysis
Galvanized W-valley was rusted and punctured. Decking underneath was spongy across approximately 12 linear feet. The old valley lacked ice & water shield and relied solely on the metal.
Process
One and a half day project. Afternoon of day 1 for tear-out and decking. Day 2 morning for ice & water, new valley, and shingle closure.
Outcome
Leak fully resolved through two heavy rainstorms. Ceiling stain treated and painted by homeowner. Valley now has proper layered protection.
Project Details
Materials Used
New aluminum W-valley flashing, 5/8 inch OSB for decking, GAF WeatherWatch ice & water shield, matching architectural shingles, galvanized roofing nails, underlayment.
Methods & Techniques
Removed valley shingles and the failed metal pan. Cut out and replaced 3 sheets of rotten decking. Installed ice & water shield over the entire valley. Set new aluminum W-valley. Closed-cut shingle pattern installed over the valley with proper offset.
Key Highlights
New decking where rotted, ice & water under valley, blended shingle closure, permanent leak fix.