What is thermally broken aluminium?

ajwindowsanddoors
1 day ago
1 min read

"Thermally broken aluminium refers to aluminium frames (typically for doors and windows) that include a thermal break—a non-metallic insulating barrier—designed to reduce heat transfer between the interior and exterior sides of the frame.

🧊🔥 Why It Matters

Aluminium is strong, durable, and lightweight, but it's also a high conductor of heat and cold. Without a thermal break, an aluminium frame can:

Lose heat in winter

Gain heat in summer

Cause condensation on the inside

Lower overall energy efficiency

🧱 What Is a Thermal Break?

A thermal break is typically a polyamide strip or another insulating material inserted between the inner and outer aluminium sections of the frame. This strip interrupts the metal-to-metal connection, reducing thermal conductivity.

Imagine it like a barrier that “breaks” the heat path, preventing it from traveling through the frame.

✅ Benefits of Thermally Broken Aluminium:

Improved Energy Efficiency

Reduces heat loss in winter and heat gain in summer, helping maintain a consistent indoor temperature.

Better Insulation (Lower U-values)

Helps windows and doors meet or exceed modern building standards.

Condensation Resistance

Less likely to form condensation on interior surfaces, which helps prevent mould and damage.

Comfort

Inner frames stay warmer in cold climates and cooler in hot ones.

Durability with Modern Performance

Retains aluminium’s structural strength and slim profile while solving its insulation weakness.