Attaching two window units together is called mulling. Because mull kits seal using adhesive, mulling also provides protection against the elements. Pella® Windows mulling kits and mull …

Make a beautiful and rich look to your residence or office by choosing this Ply Gem White Mull Kit for Single Hung Vinyl Windows.

Explore a wide range of window mullion products, from self-adhesive grille inserts to cuttable trim. Enhance your space with decorative, customizable solutions.

Discover options for window mulling with Marvin. Our factory mulled windows and doors are joined by their frames as a focal point that lets in natural light.

Apr 5, 2025 · A universal window mull kit is a collection of components designed to join two or more individual window units together into a single, structurally sound frame.

Joining kits are made to order. Please call 877-835-9090 to order.

The Performax™ Mull Kit lets you join two or more windows into a single unified unit. Features a sturdy aluminum mullion bar with end caps and a matching vinyl cover!

Mull Kit Installation Instructions nce with the installation manual. For more information, We recommend all Western Window Systems products be installed by experienced professionals.

Pella® Windows mulling kits and mull covers are compatible with multiple Pella® Windows and make do-it-yourself window-joining very approachable. We also offer a number of other types …

You can count on the Ply Gem 510 series windows and accessories for performance. These products not only add style but also value in a low-maintenance vinyl window line.