Our commitment to our roots runs deep. We're proud to provide stability for thousands of North American families who devote their time to manufacturing products that improve people's lives and homes. Great products are the result of great people working together. At M-D Building Products, we are a family company both in ownership and in the values that create our positive work environment. Every day, millions of us go about our lives using products we wish worked better. Then every once in a while, one person sees a solution that changes everything.

It was a simple - but revolutionary - first. L.A. Macklanburg, frustrated with the dust and dirt blowing in under his door, created the first form of weatherstripping-inspiring not only a solution, but a business. It was symbolic of the smart, refreshingly uncomplicated thinking that continues to define M-D Building Products today: quality that never wavers and innovation that never stands still. A family-owned business with more than 90% of our products manufactured in North America, we stand apart in our ability to maintain higher standards of quality control, respond faster to changing market conditions and meet customer demand with greater speed and efficiency.

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