Ice and Water Barrier

(Roof overhang”+wall depth”+24”) ➗ (cos(roof pitch in degrees)) 🟰inches of Ice&Water Barrier

Ice & Water Barrier Calculator

Find out how much ice and water barrier you need along your eave.

Roof Overhang

inches

Wall Depth

inches

Roof Steepness

Not Steep Easy to walk on Moderately Steep Walkable but dangerous Very Steep Cannot walk on it

Ice & Water Barrier Needed —

Enter your values above to see your result.

Eave Cross-Section Diagram

Diagram updates as you enter values.

This calculator provides an estimate. Consult a licensed roofing contractor for final measurements.