HAAG Certified Reviewer Practice Exam 2025 – Complete Study Guide

Inadequate roof flashing can significantly compromise the integrity of a roofing system, potentially resulting in water ingress and damage. Flashing is designed to direct water away from critical areas of the roofing system, such as joints, chimneys, and valleys. If the flashing is improperly installed or deteriorated, it fails to create an effective barrier against water, allowing it to seep into the underlying structures. This can lead to various issues, including mold growth, rotting wood, insulation damage, and even structural deterioration, ultimately necessitating expensive repairs.

The other options present scenarios that are not inherently linked to the purpose of flashing. Improved water drainage (A) would depend on adequate flashing rather than inadequate conditions. Increased sunlight exposure (B) does not have a direct connection with the installation or condition of flashing. Better thermal insulation (D) is related to material properties and installation but is not influenced by the adequacy of flashing.