Champion Windows and Home Exteriors of Birmingham offers Window Replacement, Vinyl Siding, Entry Door & Exterior Door Installation, and Custom Sunrooms in Birmingham and surrounding areas. Contact us for a free in-home consultation 24/7! Champion Windows and Home Exteriors of Birmingham offers Window Replacement, Vinyl Siding, Entry Door & Exterior Door Installation, and Custom Sunrooms in Birmingham and surrounding areas. Contact us for a free in-home consultation 24/7!