Design flexibility with warm edge performance inside the insulating glass unit

Many insulating glass units combine a warm edge spacer at the perimeter with aluminum muntin bars inside the glazing. MU10 extends the warm edge approach to the decorative grid within the insulating glass unit.

The system provides an alternative to conventional aluminum muntin bars, combining improved thermal performance with design flexibility and a coordinated appearance.

The challenge

Muntin bars create distinctive grid patterns in insulating glass units and are widely used in Georgian, Viennese and other traditional glazing designs.

Conventional aluminum muntin bars, however, form an additional thermal bridge within the insulating glass unit. Manufacturers also require a choice of profile dimensions and compatible accessories to produce different grid configurations efficiently.

The solution

Installed inside the insulating glass unit, the rigid MU10 system consists of polypropylene profiles with a glass-fiber-reinforced core and dedicated accessories.

The extended product range gives insulating glass manufacturers greater flexibility when replacing aluminum muntin bars with a warm edge solution. Its rigid construction supports defined grid geometries and efficient integration into established production processes.

Warm edge inside the IGU

MU10 applies warm edge technology not only at the perimeter, but also within the decorative grid of the insulating glass unit.

Key benefits:

• Improved thermal performance compared with aluminum muntin bars
• A wider range of decorative grid designs
• Rigid profiles for defined geometries
• Dedicated accessories for system-compatible connections
• A coordinated appearance with Technoform warm edge spacers
• Efficient integration into insulating glass production

Explore MU10 at glasstec 2026

At glasstec 2026, visitors can examine the profiles and compatible accessories and learn how the components form a complete muntin bar system.

Discover a warm edge muntin bar system that combines thermal performance, design flexibility and production efficiency.