What is the significance of cover boards in roofing systems?

• A. They distribute uplift loads, improve puncture resistance, and protect insulation.
• B. They provide cosmetic finish.
• C. They generate heat.
• D. They insulate completely.

Answer: (A)

Cover boards act as a protective, stiff layer within a roofing system, and their main value is in how they enhance durability under wind and physical stress while shielding the insulation underneath. When wind loads try to lift the membrane, the cover board helps spread those uplift forces over a larger area of insulation and deck, reducing concentrated stress on seams and fasteners and helping the assembly resist wind-induced damage. The rigid board also increases puncture resistance, offering a sturdy surface that resists damage from foot traffic, dropped tools, or equipment during installation and maintenance, which in turn protects the insulation beneath from punctures or compression. Additionally, the cover board provides a protective barrier for the insulation, shielding it from mechanical damage and moisture during construction and service, so the insulation can maintain its thermal performance over time. They aren’t meant to provide cosmetic finish, generate heat, or insulate completely; their primary function is to support and protect the roof system components, especially the insulation, while contributing to wind uplift resistance.