Ice and Water Barrier is one of the most important materials installed on a roof. This material is typically installed along the eaves of the roof to help reduce the possibility of leaks due to ice damming. Ice and Water Barrier is also installed in the valleys of the roof where two different sections of roof join to drain water off the roof. Over the Top Roofing & Exteriors also installs Ice & Water Barrier around the attic vents and plumbing vents as these areas are some of the most susceptible to leaks.