Calculate My Roof Square Footage

Roof Square Footage Formula:

\[ \text{Sq Ft} = \frac{\text{Length} \times \text{Width}}{\cos(\text{Pitch})} \]

Roof Square Footage:

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1. What is Roof Square Footage?

Roof square footage is the total area of a roof's surface, accounting for its pitch (slope). It's essential for roofing material estimation, cost calculations, and construction planning.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{Sq Ft} = \frac{\text{Length} \times \text{Width}}{\cos(\text{Pitch})} \]

Where:

Length — Horizontal length of the roof (feet)
Width — Horizontal width of the roof (feet)
Pitch — Angle of roof slope (degrees)
cos(Pitch) — Accounts for the increased surface area due to slope

Explanation: The steeper the pitch, the larger the actual roof surface area compared to the flat footprint.

3. Importance of Roof Measurements

Details: Accurate roof square footage is crucial for purchasing the correct amount of roofing materials, estimating costs, and ensuring proper structural planning.

4. Using the Calculator

Tips: Measure the length and width of your roof's footprint in feet. Enter the pitch angle in degrees (0° for flat roof, typically 20°-45° for pitched roofs).

5. Frequently Asked Questions (FAQ)

Q1: How do I measure my roof's pitch?
A: Use a level and tape measure to determine the rise over a 12-inch run, or consult architectural plans.

Q2: What if my roof has multiple sections?
A: Calculate each section separately and sum the results for total square footage.

Q3: Does this work for complex roof shapes?
A: This calculator is for simple rectangular roofs. Complex shapes require more detailed measurements.

Q4: How accurate is this calculation?
A: It provides a good estimate for standard roofs but may need adjustment for very steep pitches or irregular shapes.

Q5: Should I add extra for waste?
A: Professionals typically add 10-15% to account for cutting waste and overlaps.