The table below shows indicative DIY pricing for a standard double door (16 panels) across the main product types currently available in Australia. All prices are before freight. Freight can add significantly to the total depending on your location, so always confirm the delivered price before purchasing.
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| Product Type | Approx. DIY Price (Standard Double Door, Before Freight) | Notes |
|---|---|---|
| Foil-only sheeting (e.g. hardware store rolls) | ~$100–$215 | On their own R-values are as low as R0.1. Requires an air gap to function; when glued directly to steel with no air gap, provides negligible thermal resistance. R-values quoted are based on wall and roof testing environments — a vastly different application to a garage door — and may be overstated for this use. |
| EPS panel kits (basic, via trade suppliers) | From ~$350–$460 | R-values are typically based on wall or roof testing, not garage door assembly. No independent assembly R-value for the garage door application. |
| ThermaDoor Premium (purpose-built EPS system) | ~$640 | Independently verified assembly R-value R1.43 (winter) / R1.39 (summer) under AS/NZS 4859.1/.2:2018 — tested as a complete garage door assembly, not a wall or roof. |
| Rubber peel-and-stick sheets | ~$669 | Pipe lagging material adapted for garage doors. R-values based on pipe lagging application, not garage door assembly. No independent assembly R-value for the garage door application. See note below. |
| PIR foam panels | ~$700 | Construction-grade material designed for roofing and walls. R-values quoted are material R-values from those applications — not independently verified as a garage door assembly R-value. See note below. |
For a standard double door (16 panels), DIY garage door insulation in Australia currently ranges from approximately $460 to $700 before freight, depending on the product type. Professional installation typically ranges from approximately $700 to $1,200 or more for a standard double sectional door, depending on location and product. Always confirm the delivered price directly with suppliers, as freight can add significantly to the total.
For most homeowners, yes — provided the product is purpose-built for a moving steel garage door and has an independently verified assembly R-value. A DIY kit that glues directly to the door with no air gap, or one that uses construction materials not designed for the application, may cost less upfront but deliver little real-world thermal benefit. See our guide to comparing garage door insulation options before purchasing.
The best value is not always the cheapest or the most expensive. Look for a product with an independently verified assembly R-value (not just a material R-value), an engineering report you can actually read, and a design that accounts for the mechanical demands of a moving door. ThermaDoor is independently tested to R1.43 (winter) / R1.39 (summer) under AS/NZS 4859.1/.2:2018.
Because the market includes products ranging from purpose-built systems with independent engineering data to construction materials repurposed for an application they were never designed for. A PIR foam panel, a rubber peel-and-stick sheet, and a purpose-built EPS panel system can all sit at similar price points while delivering very different results. The only reliable comparison is verified performance data — specifically, an independently tested assembly R-value for the garage door application.
Yes, in many cases. NDIS participants with thermoregulation difficulties related to conditions such as Multiple Sclerosis or Spinal Cord Injury may be eligible for funding under NDIS Capital Supports as a Minor Home Modification. An occupational therapist assessment is required. Visit our NDIS page for full details.
Garage door insulation improves the thermal comfort and usability of the garage and adjoining rooms, which is increasingly valued by buyers. It also contributes to the overall thermal envelope of the home, which is relevant to NatHERS energy ratings under the National Construction Code.
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.
ThermaDoor is the manufacturer of the products discussed in this article and has a commercial interest in their sale. While every effort has been made to ensure the accuracy of the information presented, readers are encouraged to conduct their own research and consult qualified professionals before making purchasing decisions. All R-values cited are independently verified assembly R-values under AS/NZS 4859.1/.2:2018.
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