Regal Replacement Windows in Portland Me, is a full service window company. We sell and install some of the best replacement windows in the industry. Our partnership with Soft-lite, assures that you receive beautiful windows with the quality craftsmanship you deserve and Energy Star performance for maximum efficiency. The choices are endless when it comes to style, color and patterns. All of our windows are American Made and have a 20 year glass warranty and lifetime warranty on parts and mechanisms. Our Historical certified windows meet the strict preservation codes required by the city of Portland, Our trained installers are professional, knowledgeable and friendly.