For over 60 years, ASA Builders Supply has been the largest single trim and door shop in the Metro Detroit area. ASA Builders Supply has a 55,000 square foot warehouse that holds Interior Doors, Mouldings, Shelves/Mantels, Stair Parts and so much more. Buy where the builders buy at prices lower than major hardware stores such as Lowes and Home Depot. Our design and installation experience is unmatched

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