Custom & stock
moulding and millwork

Riverhead Building Supply is your solution for all of your moulding and trim needs with a vast selection of stock materials and custom capabilities from our Millwork Shop.

Stock moulding & trim

All of your moulding and trim needs can be found in one convenient place, Riverhead Building Supply. View our Stock Moulding Catalog or share it with your client to facilitate product selection. Choose from a variety of wood species or composites with stock profiles from WindsorONE, Garden State Lumber, Versatex, Boral and James Hardie. Our broad selection will suit most jobs and be readily available to keep your project moving forward.

Custom millwork capabilities

Our Custom Millwork Shop can turn your sketches into a unique profile or replicate a historic profile up to 12” in width that will help win you the job and client referrals. Our team will assist with installation instructions and oversight as requested. The Custom Millwork Shop is equipped with state-of-the-art machinery, including routers, moulders, and CNC (Computer Numerically Controlled) machines for unparalleled precision. Our experienced operators use these technologically advanced machines to help make your project a one-of-a-kind.

We can even make a template for your custom window shapes; arches, gothic, eyebrow, and more.

Have a question about our custom millwork services