Mullions
Aluminum mullions and corner posts for joining impact window and door units, in white or bronze.
18 products · 15 in stockFrom $7.66
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Out of stockAbout Mullions
Mullions are the aluminum posts that join two or more units into one wider opening, and corner posts join units at an angle. Listed mullions come in white or bronze. A mullion must be approved for the units it joins and for the design pressure of the opening, so confirm the series and approval before you order.
Colors, glass and privacy options
Frame color, glass color and privacy interlayer options of the same unit are listed as separate products, so each one shows its own price and stock. Use the filters above to compare them.
Looking for a size that is not listed?
Contact us with the width, height and configuration you need and we will tell you what we can offer.
Mullions: frequently asked questions
How do I choose the right mullion?
Match the height of the joined units, the frame color and the series or brand of the windows or doors. Send us the model and size of your units and we will help you confirm the mullion before you pay.
Is a mullion required between two impact windows?
When two separate units share one opening, the joint is usually made with an approved mullion. The exact requirement is set by the product approval and your building department, so check the installation instructions and your permit.
