PGT ClassicVue (Series 200) is constructed from heavier and stronger aluminum than most brands. They also undergo a battery of tests to ensure optimum performance and durability. These windows are engineered to last. Then there’s the company behind these products. PGT is a company built on quality engineering with one of the largest and best design teams in the business, so it should come as no surprise that our aluminum, non-impact products are among the strongest on the market.