Ice & Water Shield

Calculate self-adhering membrane requirements for eaves and valleys per IRC R905.1.2

Enter roof dimensions

Total Eave Length

LF

Sum of all eave edges

Valley Length

LF

Optional: Total valley lengths

Overhang Depth

IN

Distance from fascia to exterior wall

Waste Factor

%

Material waste allowance (typical: 10%)

Measurement Source

Recorded in exported documents for audit trail

Wall Thickness

Code Requirement

Roof Pitch

Code Reference

Enter eave length to calculate membrane requirements