National Lumber, Inc., of North Haven, Connecticut, has been the heart of the building industry in the New Haven area for over sixty years. Locally owned and operated, we provide full service framing, millwork, trusses, engineered joists & beams, windows, kitchens and trim to the area’s largest, most respected residential contractors. Our professional sales and service staff work hard to ensure timely deliveries and efficient order production. We want your business! Contact us today.