Ice and water shield is a self-adhering underlayment designed for areas of the roof that need extra waterproof protection. It seals more tightly than standard underlayment.
Why It Matters
Areas such as eaves, valleys, and penetrations are more vulnerable to water backup. Ice and water shield helps protect the roof deck if water gets beneath the shingles.
Common Problems
Problems can include missing coverage, poor adhesion, wrinkles, improper overlaps, and assuming the product fixes ventilation or insulation issues that cause ice dams.
Exterior Echelon Notes
Exterior Echelon looks at where ice and water shield is installed, how it integrates with drip edge and underlayment, and whether the roof has adequate ventilation support.
