Welcome to McCormack Building Supply

Your Partner in Projects Big and Small

Welcome to McCormack Building Supply.  We have been serving homeowners and contractors with quality building materials since 1979.  We are family owned and operated and service our local and surrounding community from our Winslow location.  Our employees are what separate us from our competition.  Their dedication to our customers and their jobs is second to none.  We offer free on-site estimating, kitchen and bath design and free delivery!  We will take the extra steps necessary to make sure your project is a success.

"Excitement is Building!"  This is our tagline and we think it says it all.  We are excited about our industry and the projects we are part of.  Building a home, addition, garage, deck and/or renovating a space is one of the most exciting
times in a person's life and we are proud to be part of your experience.  

Product Spotlight


Ella’s Bubbles – a Chicago-based OEM manufacturer and distributor of acrylic walk-in bathtubs and accessible showers – has spearheaded acrylic walk-in bathtub development, production, and distribution...


ENERGY STAR Performance RatingsAndersen makes windows and doors that meet ENERGY STAR® performance requirements in all 50 states, and Andersen Corporation earned the 2013 ENERGY STAR Sustained Excellence...


Heavy-Duty Floor Protection

Heavy-duty floor protectionWater shield technologyRepels water, mud, paint, and moreLays flat and fast100% recyclableRe-usableContributes towards satisfying MR 2 under LEED®Vapor permeable, allows proper...