Highlights A square is 100 square feet, measured as 10 x 10 feet. The roofing industry uses squares to measure roofing areas, and manufacturers sell shingles by the square. Contractors use the number of squares needed to complete a roofing project to estimate the total costs. Shingle Square All roofing projects require contractors to take […] The post What Is a Square in Roofing? Understanding Roofing Measurements first appeared on AJ Reyes Roofing Inc..