1. What is a Roof Linear Feet Calculator?

Definition: This calculator estimates the total linear feet of roofing materials needed based on perimeter, ridge, valleys, and edges measurements.

Purpose: It helps roofing professionals and DIYers determine how much trim and other linear materials are required for roofing projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( LF \) — Total linear feet
• \( P \) — Perimeter of the roof (feet)
• \( R \) — Ridge length (feet)
• \( V \) — Valleys length (feet)
• \( E \) — Edges length (feet)

Explanation: The calculator sums all linear components of a roof to determine total material requirements for trim, flashing, and other linear elements.

3. Importance of Linear Feet Calculation

Details: Accurate linear feet calculation ensures proper material ordering, reduces waste, and helps estimate project costs more precisely.

4. Using the Calculator

Tips: Measure and enter each component separately. All values must be ≥ 0. For complex roofs, break down into sections and calculate separately.

5. Frequently Asked Questions (FAQ)

Q1: What exactly counts as "edges"?
A: Edges include all roof edges that require trim or flashing, including eaves, rakes, and gable ends.

Q2: How do I measure valleys?
A: Measure the full length of all valleys where two roof planes intersect.

Q3: Should I include dormers in the perimeter?
A: Yes, include the perimeter around any dormers as they require trim materials.

Q4: Does this include waste factor?
A: No, consider adding 10-15% to the calculated linear feet for cutting waste and overlaps.

Q5: Can I use this for metal roofing?
A: Yes, this calculation works for any roofing material that requires trim pieces measured in linear feet.