Welcome to Champion. With over seven decades of experience and expertise, Champion Windows and Home Exteriors is one of the nation’s leading home improvement companies. Champion transforms homes with premium-quality products that are designed, built, installed, and guaranteed by Champion. Every product Champion offers – from new windows and sunrooms, to siding and entry doors – is built right here in the USA, backed by our industry-leading Limited Lifetime Warranty, and comes recommended by more than 9 out of 10 recent Champion customers.