Peter is a licensed builder with over 45 years of experience in the construction industry. In 2012, his expertise in energy efficient construction inspired the invention of ThermaDoor Premium garage door insulation - the original purpose made garage door insulation in Australia.
When you’re looking at buying a new garage door or upgrading your existing one, insulation often comes up in the conversation. Many companies advertise their product with flashy promises like:
“Your garage will be 13 – 17°C cooler!”
But here’s the catch: those claims are misleading. At ThermaDoor, we don’t guess at how many degrees your garage will change — we publish verified R-values, the only reliable measure of insulation performance in Australia.
The comfort level inside your garage is influenced by much more than just the garage door. Even two homes on the same street can have very different garage temperatures. That’s because performance depends on things such as:
Windows and skylights letting in direct heat.
Ceiling insulation (or none at all).
Garage orientation – west-facing garages get hotter.
Colour of the garage door – darker doors absorb more heat.
Wall construction – brick, cladding, or blockwork all behave differently.
This is why blanket “X degrees cooler” claims aren’t accurate. They’re marketing spin, not real performance data.
An R-value measures thermal resistance – how well the insulation slows down heat transfer. It’s the same standard builders use when designing walls, ceilings, and floors.
Standardised testing to the most rigorous and up to date Australian Standards.
Recognised by the National Construction Code & NatHERS for energy ratings.
Relied on by builders, designers, and energy assessors when selecting products.
When upgrading or purchasing a new insulated garage door, performance matters. ThermaDoor Premium is the only Australian garage door insulation with dual-season, door-assembly R-values as required by the National Construction Code:
R1.48 (Winter)
R1.43 (Summer)
Built by Australians for Australian conditions, ThermaDoor is:
Purpose-made for sectional and tilt doors.
Compliant with AS 3999 installation standards.
Energy-efficient, supporting NCC 2022 7-Star ratings.
A new garage door without insulation is like building a wall without protection – heat and cold move freely in and out. By insulating, you’re turning your garage into a more usable, comfortable space that adds value to your home.
With ThermaDoor you’ll get:
Proven performance, not empty promises.
Lower heating and cooling costs year-round.
Comfort and usability whether it’s a home gym, office, or workshop.
If you’re shopping for new garage doors in Australia, don’t settle for marketing numbers that can’t be guaranteed. Instead, choose insulation tested to the correct Australian Standards, backed by engineering reports with real results.
ThermaDoor Premium is Australia’s original, still the only purpose made garage door insulation. Designed by a builder, backed by compliance, and trusted nationwide. That’s the difference between marketing spin and measurable results.
Because the temperature inside a garage is influenced by many factors – including windows, skylights, ceiling insulation, garage orientation, and even door colour – no two garages perform the same way. A blanket promise like “your garage will be 13–17°C cooler” ignores these variables. It’s marketing spin, not science. The only reliable performance measure is the R-value, which is verified through standardised testing.
An R-value measures thermal resistance – how well a material slows the transfer of heat. The higher the R-value, the better the insulation performs. In Australia, R-values are recognised by the National Construction Code (NCC) and NatHERS energy rating system, making them the trusted benchmark for builders, designers, and energy assessors. Unlike temperature claims, R-values are tested, repeatable, and directly comparable.
ThermaDoor Premium is calculated to AS/NZS 4859.1 & 4859.2:2018 standards, with results calculated for the full garage door assembly (not just the material). That’s why we can publish dual-season results:
R1.48 in Winter (15 °C)
R1.43 in Summer (30 °C)
This ensures the numbers reflect how the product performs in real Australian conditions in the garage door
Yes. An uninsulated garage door has an R-value of R0.0, meaning it offers no resistance to heat flow. By insulating with ThermaDoor Premium, you reduce heat gain in summer and heat loss in winter. This makes your garage more comfortable and can also lower your home’s overall heating and cooling costs. It’s why ThermaDoor supports NCC 2022 7-Star ratings outcomes for new home builds and signficiant renovations.
ThermaDoor Premium is purpose-designed for sectional and tilt doors – the most common types in Australian homes. Unlike products adapted from wall insulation or reflective foil, ThermaDoor is engineered to fit securely, maintain necessary air gaps, and align with AS 3999 installation standards, ensuring both safety and performance.
ThermaDoor is:
Australian-made and designed for Australian climate extremes.
Backed by compliance – AS/NZS 4859.1 & 4859.2:2018 (materials), AS 3999 (installation).
Purpose-built for garage doors, not adapted from walls or ceilings.
Proven with verified assembly R-values, not temperature guesses.
It’s Australia’s original and still the only truly purpose-made garage door insulation.
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