1. What is an Asphalt Starter Strip Calculator?

Definition: This calculator determines the length of asphalt starter strip needed for roofing projects based on the roof perimeter.

Purpose: It helps roofing professionals and DIYers accurately estimate the amount of starter strip material required.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L_s \) — Length of starter strip (feet)
• \( P \) — Roof perimeter (feet)

Explanation: The roof perimeter is divided by 2 because starter strips are typically applied to half the perimeter (eaves only in most cases).

3. Importance of Starter Strip Calculation

Details: Proper starter strip installation prevents water infiltration at roof edges and ensures proper shingle alignment.

4. Using the Calculator

Tips: Measure the total roof perimeter where starter strips will be applied. Enter the value in feet. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 2?
A: Starter strips are typically only needed along the eaves (bottom edges), which is approximately half the total perimeter.

Q2: When would I need full perimeter starter strips?
A: Some roofing situations (like steep slopes or special designs) may require starter strips on all edges.

Q3: How do I measure roof perimeter?
A: Measure the total linear distance around the roof edges where starter strips will be installed.

Q4: Does this include waste factor?
A: No, consider adding 5-10% to the calculated length for cutting waste and overlaps.

Q5: What width should the starter strip be?
A: Standard starter strips are 6-12 inches wide, but check manufacturer specifications for your roofing material.