Port Lumber Port Lumber Corp. is Long Island’s largest supplier of marine piling, timber, pressure treated lumber and vinyl sheet piling. With our yard conveniently located in Riverhead, New York, we deliver everywhere on Long Island and throughout the Northeast. We Stock a Full Line of Marine Construction Supplies! Regardless of what material you are looking for, Port Lumber has the leading brands in stock, including ShoreGuard, C-LOC, TimberTech, and ThruFlow. Port Lumber also stocks a wide assortment of marine hardware. If you have any questions, give us a call and we’ll be happy to assist you. Pressure Treated Lumber & Piling Wood & Composite Decking Tropical Lumber & Piling Sheet Piling Helical Piling & Tie Backs Dock Flotation Recycled Plastic Lumber Marine Hardware,Tools & Supplies View Map Copyright © 2011 Port Lumber Corp. | Riverhead, New York | 631.727.3842 | Privacy Policy | Terms of Use. This website was created by Lighthaus Design.