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


FOR OVER 50 YEARS, KNAACK Secure Jobsite Storage has had the strongest work ethic around - and the smartest.  Not only does every box, chest and cabinet cause tool thieves to strongly reconsider,...


Homeowners find EcoTouch® PINK® FIBERGLAS™ Insulation with PureFiber® Technology fast and easy to install. In addition, EcoTouch® insulation:Delivers comfort – helps homes stay cooler in the summer and...


ROXUL® - The Better Insulation™

Roxul ComfortBatt™ is a stone wool insulation products for use in both new residential construction and renovations.  This semi-rigid batt has a unique flexible edge designed to compress as the batt...