A small roof leak can turn into a big bill if you wait. In Edmonton, roof leak repair cost usually falls between $350 and $1,000, and up to $2,500 if water has already soaked the decking or insulation. This guide explains the most common leak sources on Edmonton homes, including cracked pipe boots, failed chimney flashing, ice dams and hail-bruised shingles, and shows why finding the real source matters more than a quick patch.