If you’re insulating your garage door, including an air cavity between the metal panel and the insulation isn’t just smart, it’s essential! This hidden feature plays a vital role in moisture control, thermal performance, and protecting your garage door over time.

At ThermaDoor, we’ve designed a purpose-built solution that includes an engineered air cavity – tested to perform in Australian conditions and aligned with AS 3999 installation standards.

Moisture Control 
Prevent Condensation and Mould with an Air Cavity

Condensation builds up quickly on metal garage doors, especially in cooler or coastal climates. Without an air cavity, insulation can trap moisture, which leads to mould, rust, and structural damage over time.

Our system includes a ventilated cavity behind the insulation panel, allowing airflow that keeps your garage dry and protects the door’s internal components.

Enhanced Thermal Performance

Boost Energy Efficiency with a Thermal Air Barrier

The air cavity also acts as a secondary thermal layer, slowing the transfer of heat through conduction. This:

• Improves the R-value of your garage door

• Keeps the garage cooler in summer and warmer in winter

• Contributes to improved NatHERS star ratings

Protects the Garage Door 

Allows for Safe Expansion and Contraction

Metal garage doors naturally expand and contract with temperature changes. When insulation is glued directly to the door, it can crack, detach, or stress the motor and springs.

ThermaDoor’s system includes a floating cavity design that:

• Allows natural door movement

• Prevents compression of insulation

• Reduces risk of failure over time

Aligned with AS 3999 

Aligns with Australian Standards for Insulation Installation

ThermaDoor’s installation method is fully compliant with AS 3999, the Australian Standard for the installation of bulk insulation. We ensure:

• Secure mechanical fixing (no glue)

• Air cavities are preserved as thermal and moisture barriers

• Garage door integrity is protected

Many other products fail to meet these standards, putting your door and insulation at risk.

Summary 

ThermaDoor: The Smart Way to Insulate Your Garage Door

Insulating your garage properly means doing it the right way with a system that includes an air cavity, aligns with Australian Standards, and is designed for the realities of your garage environment.

With ThermaDoor, you get:

• Moisture control and mould prevention

• Improved thermal performance

• Protection from door movement damage

• AS 3999 aligned – installation

Insulate Smart. Live Better.
Choose ThermaDoor—Australia’s original, purpose-built garage door insulation.

Garage door insulation air cavity