Class 3 vs Class 4 Shingles

Making the Right Choice for Your Home How Shingles Are Tested   1.75″ Steel Ball   Class 3 Shingles VS   2″ Steel Ball   Class 4 Shingles UL 2218 Standard: Steel balls dropped from 20 feet to test impact resistance Durability   Class 3 Withstands moderate impacts Good for moderate weather Handles winds up […]