roof - felt and Ice & Water Barrier
An **Ice & Water Barrier** (also called Ice & Water Shield) is a self-adhesive waterproofing membrane that is installed on the roof, typically in vulnerable areas such as the **eaves** (the lower edge of a roof), valleys, around chimneys, and skylights. It provides an additional layer of protection to prevent water from penetrating under the shingles, especially in regions prone to ice dams or h..