Rotted roof decking is the hidden cost many Edmonton homeowners never see coming, because it only shows once the shingles come off. Roof decking repair cost in Edmonton is usually about $100 to $180 per 4x8 sheet, installed. Learn why a fair roof repair quote lists the per-sheet decking price up front, what causes decking to rot, and how catching leaks early keeps a simple repair from turning into a structural job.