How many bundles are typically required for a square of 3-tab shingles?

To determine the number of bundles typically required for a square of 3-tab shingles, it's important to consider what is meant by a "square" in roofing terminology. A square refers to an area of roofing that measures 100 square feet.

Three-tab shingles are designed such that a certain number of shingles come in each bundle. Generally, one bundle of 3-tab shingles will cover about 33.3 square feet. Therefore, if we know that a square is 100 square feet, we can calculate how many bundles are needed to cover that area.

To cover 100 square feet when one bundle covers approximately 33.3 square feet, the calculation would be: 100 square feet ÷ 33.3 square feet per bundle ≈ 3 bundles.

This approximation leads us to the conclusion that around 3 bundles are typically required to cover one square of 3-tab shingles. Thus, the correct answer reflects the standard calculation for roofing material coverage and is consistent with common industry practices.