Water Mill Building Supply
Fiberon Composite Decking & More

Water Mill Building Supply is a one-stop shop for professional building materials, hardware, lumber, paint, windows/doors, millwork, and high-end design hardware. With a convenient location and fast deliveries, we have been providing knowledgeable cust...

Visit Water Mill Building Supply in Watermill, NY for all of your Fiberon composite decking and railing needs. Shop for the best decking in the Watermill area that will last long term. Transform your deck with high quality WPC and PVC decking that won’t warp, rot or splinter, so the look you love today will be there tomorrow. Wooden decking simply can’t compare. Experience a one-of-a-kind experience with our discovery deck design software that helps you visualize your dream deck, or browse through great Fiberon deck inspiration with our inspiration gallery. Whether you're looking to redesign your pool deck, front porch, or totally transform the look and feel of your backyard, Water Mill Building Supply can help you make your ideas come to life with Fiberon decking.