<https://www.simpli.com/lifestyle/step-step-guide-calculating-number-roof-shingles-needed>
<http://schema.org/description>
"When it comes to roofing, one of the most important calculations is determining the number of shingles needed for a project."
<https://www.simpli.com/lifestyle/step-step-guide-calculating-number-roof-shingles-needed>