Ice and water shield is a self-adhering waterproof membrane installed in vulnerable areas of a roof such as valleys, eaves, and around penetrations. It is specifically designed to prevent water infiltration caused by ice dams, heavy rain, and melting snow. In colder and wet regions like British Columbia, this material is essential for protecting roof decks from moisture damage. The rubberized asphalt composition allows it to seal tightly around nails and fasteners, creating a watertight barrier. It is commonly required by building codes in high-risk roofing zones and significantly improves long-term roof durability.
