04/09/25

PVC Windows with Movable mullions: Features and Advantages

Movable mullions is a special T-shaped profile that is installed on window sashes and allows them to open without a vertical перемычка (impost). Thanks to this element, maximum light transmission and convenience during room ventilation are achieved.

Design and Operating Principle

Movable mullions window consists of two sashes, one of which is active, and the second opens only after the first one. The movable mullions is installed on the driven sash and ensures a tight fit when closing. The main structural elements include:

• Movable mullions profile
• Locking mechanism
• Seals for tightness
• Hardware for control

Advantages of Movable mullions Windows

Main benefits of such windows:

• Maximum light transmission without vertical partitions
• Improved panoramic view
• Effective room ventilation
• Modern aesthetic appearance
• Versatility of application in various premises

Areas of Application

Movable mullions windows are especially relevant for:

• Private housing construction
• Balconies and terraces
• Verandas and panoramic openings
• Rooms with high requirements for natural lighting

Operational Features

Important aspects when using movable mullions windows:

• The active sash requires sequential opening
• More complex hardware design
• Increased cost compared to standard windows
• The need for professional installation to ensure tightness

Movable mullions windows are a modern solution for those who value space, natural light, and aesthetics in the interior. With the right choice and installation, they will become a reliable and functional element of your home.