Siding Square Footage Formula:
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Siding square footage is the total area of exterior walls that need to be covered with siding material. It's calculated by measuring all exterior walls and gables, then subtracting areas occupied by doors, windows, and other openings.
The calculator uses the following formula:
Where:
Explanation: The formula accounts for all surfaces that need siding while subtracting areas that won't be covered.
Details: Accurate siding measurements are crucial for material estimation, cost calculation, and project planning. Underestimating can lead to project delays, while overestimating increases costs unnecessarily.
Tips: Measure each exterior wall separately, then sum them for the total. Measure each gable separately. Measure all window and door openings. All values must be in square feet and non-negative.
Q1: How do I measure exterior walls?
A: Measure length and height of each wall section, then multiply to get square footage. Sum all wall sections.
Q2: What counts as an opening?
A: Any area not covered by siding: windows, doors, garage doors, vents, etc.
Q3: Should I add extra for waste?
A: Typically add 10-15% to the total for cutting waste and future repairs.
Q4: How do I measure gables?
A: For triangular gables, multiply base width by height and divide by 2.
Q5: Does this include soffits and fascia?
A: No, these are typically calculated separately as they use different materials.