Local Roofing Services by The Exterior Company James Hardie, siding corners, siding, fiber cement, KWP, cedar, ACM panels, Alberta, Calgary, Canada, Novus Cladding Systems, Lamboo TRUSTED LOCAL ROOFERS SERVING LANCASTER, PA AND BEYOND. Since 2012, the local roofers at The Exterior Company have been helping homeowners and businesses throughout Pennsylvania and the East Coast avoid costly damages caused by storm damage. The areas we serve include: Lancaster County. York County.