Ice and Water Shield
Ice and water shield is a self-adhering waterproof membrane installed on the roof deck in vulnerable areas such as valleys, eaves, and around penetrations before shingles are laid.
While ice dams are rare in DFW, ice and water shield is required by Texas building code in valleys and around all roof penetrations (pipes, chimneys, skylights). The membrane has a rubberized asphalt adhesive that seals around nail penetrations, providing a secondary waterproof barrier if water gets under the shingles. GAF WeatherWatch and Owens Corning WeatherLock are the most common products used by JRH Construction.
Related Roofing Terms
Roof Underlayment
Roof underlayment is a water-resistant or waterproof barrier installed directly on the roof deck beneath shingles or other roofing materials.
Roof Valley
A roof valley is the V-shaped channel where two sloping roof planes intersect, forming a natural pathway for water runoff.
Roof Flashing
Roof flashing is thin metal (aluminum, galvanized steel, or copper) installed at roof joints, valleys, and penetrations to prevent water infiltration.