Aluminum window framing is often considered a step up from wood or vinyl windows as aluminum is strong, joins together simply, and is less vulnerable to moisture damage. Aluminum framing and mullion sections are extruded and provide crisp, aesthically pleasing profiles which come equipped with factory finishes. ALuminum does conduct heat rapidly however so a thermal break of plastic or synthetic rubber is typically utilized to eliminate thermal flow through which can cause fogging and also frost on the interior side during winter months. Aluminum windows are typically more expensive than wood or plastic but the cost is often justified from a maintenance/durability standpoint, especially in commercial applications.

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The most common finish on aluminum windows is Anodized and the most common color choices are: clear, champagne, light bronze, medium bronze, dark bronze, and black.