If you are a builder, designer, architect or homeowner building a new home, don’t leave the garage door out of your NatHERS 7-star strategy. Under NCC 2022, building fabric insulation must comply with AS/NZS 4859.1:2018 and total/system R-values must be determined in accordance with AS/NZS 4859.2:2018 – the exact framework your energy assessor uses to model performance. Incorporating a tested, purpose-built garage door R-value can be the difference between meeting or missing your target.
From 1 October 2023, most states began implementing the uplift to NatHERS 7-star minimums for new homes, with NatHERS the predominant compliance pathway. Planning for compliant, tested garage‑door insulation helps de‑risk certification.
ThermaDoor is (based on our August 2025 market review) the only Australian garage door insulation brand that publishes dual-season, door assembly R-values, which is a requirement under AS/NZS 4859.2:2018 – R1.48 (winter) / R1.43 (summer).
Australia’s original, and still the only purpose-built garage door insulation, designed for sectional and tilt doors and tested specifically for garage door conditions provides the best R-value for garage door insulation in Australia.
R- values determined in line with AS/NZS 2859.1:2018 (materials, test methods) and AS/NZS 4859.2:2018 (design and total/system R-value determination).
Purpose built panels that fit garage door geometries, support an air cavity and are moisture resistant for Australian conditions.
Due to our extensive construction experienced, designed to integrate with professional installation practices consistent with AS 3999 for bulk insulation (installation standard).
At ThermaDoor we want you to do your own research and come back to us with the hard questions, and we have developed a Garage Door Insulation – Quick Buyer’s Checklist (Australia) to help you ask the correct questions when considering investing in garage door insulation.
Read Best R-Value for Garage Door Insulation Australia (Explained) to understand the context of these questions.
If you require a copy of our official thermal test data we invite you to contact us.
No. NCC 2022 and NatHERS require standard‑aligned inputs. Use garage‑door specific, tested values determined under AS/NZS 4859.1 & 4859.2 to avoid rating errors.
From thermal calculations performed by an independent thermal engineer in accordance with AS/NZS 4859.1 and R‑value determination per AS/NZS 4859.2, expressly for garage‑door conditions (reports available on request).
It can. The 7‑Star uplift places tighter budgets on heating/cooling loads; improving a large, conductive surface like the garage door often helps projects meet targets.
Yes. NCC 2022 Volume Two Part 13.2 requires insulation to comply with AS/NZS 4859.1 and uses AS/NZS 4859.2 for total/system R‑value calculations in relevant building‑fabric elements.
The material R-value only tells you the products R-value. It doesn’t give you the big picture of how well it insulates in a certain application for example a garage door. Due to the nature of a garage door – metal, air leakage, thermal bridging a garage door will more often reduce the material value quoted.
Got more questions? Read our Garage Door Insulation FAQ’s to learn about the original, and still the only purpose made garage door insulation in Australia
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