Texas roofs take a beating from summer heat that often tops 100 degrees and...

https://extra-wiki.win/index.php/What_Roof_Underlayment_Really_Means_for_Texas_Homes

Texas roofs take a beating from summer heat that often tops 100 degrees and brutal hail storms in spring. The sun bakes shingles dry, making them crack and lose grip, while hail dents and tears them up quick