Garage Door Insulation Panels — Australian Made
Purpose-made for sectional and tilt doors, with independently verified installed-assembly R-values: R1.43 winter / R1.39 summer — backed by an engineering report.
SUNNY 28°C AUTUMN AFTERNOON
44.7°C uninsulated | 30.8°C with ThermaDoor installed
13.9°C COOLER DOOR SURFACE
Australia's Only Purpose-Made Garage Door Insulation
Est. 2012
Australia's Original System
Verified R-Values
R1.43 Winter / R1.39 Summer
Australian Made
Licence 7177
Lightweight
About 7kg - Double Door
Composite Technology
Purpose Built for Garage Doors
15 Year Warranty
Complete ThermaDoor Panel System
Why Insulate Your Garage Door?
Garage door insulation helps reduce heat transfer through one of the largest uninsulated surfaces in many Australian homes. In summer, a bare steel garage door can radiate heat into the garage and adjoining rooms; in winter, it can contribute to a colder, less usable garage.
ThermaDoor garage door insulation panels are Australian Made and purpose-built for sectional and tilt garage doors. The composite system is engineered for the complete installed door assembly, with independently verified R1.43 winter / R1.39 summer values backed by an engineering report.
Garage Door Insulation Benefits for Your Home
A More Comfortable Garage
ThermaDoor helps reduce heat transfer through your garage door in summer and winter, making the garage more comfortable to use throughout the year.
Less Heat Into Adjoining Rooms
Adding thermal resistance to the garage door helps reduce the heat and cold that can affect rooms beside or above the garage.
Protect What You Store
More stable garage conditions help protect tools, paint, sports equipment, electronics and vehicles from extreme temperature swings.
Quieter, More Usable Space
The 35mm EPS core helps dampen sound through the door, making the garage better suited to work, hobbies and family use.
Transform Your Garage into a Year-Round Usable Space
Home Gyms
Train comfortably year-round - no more sweltering summers or chilly winters.
Home Offices
Quieter, more stable temperatures for better focus and lower energy bills.
Man Caves
A retreat that stays cool in summer and warm in winter for real downtime.
Hobby Studios
Consistent conditions that protect materials and make projects more enjoyable.
Playrooms
A safer, more comfortable space for play - fewer drafts and hot/cold spots.
Pet Rooms
A calmer climate for pets, reducing heat stress in summer and chills in winter.
Looking for inspiration? Read our blog on how to transform your garage into a usable space year-round.
What Makes ThermaDoor Garage Door Insulation Different
Together, these three components form a true composite insulation system — the only one purpose-made for a garage door in Australia.
High-Density EPS Core
35mm EPS core provides the primary thermal resistance in the ThermaDoor composite panel.
READ TECHNICAL DETAIL
Flame-retardant, construction-grade expanded polystyrene foam is the primary insulator in every ThermaDoor panel. It slows conducted heat transfer through the door, keeping your garage significantly cooler in summer and warmer in winter. As the primary insulator in the composite system, it works with the laminated Sisalation foil backing and engineered air cavity to deliver the verified installed-assembly R-value.
Sisalation Foil Backing
Laminated Sisalation foil reflects radiant heat across ThermaDoor’s engineered internal air cavity.
READ TECHNICAL DETAIL
Laminated to the rear of each panel, construction-grade Sisalation foil forms the reflective layer in the ThermaDoor composite system. Its low-emissivity surface works across the engineered internal air cavity, maintained by purpose-made foam packers. The foil also functions as a Class 2 vapour barrier and achieves Group 1 fire performance classification — it’s the same foil used to wrap Australian homes.
UV-Stable Vinyl Facing
UV-stable laminated vinyl facing helps protect the EPS core and lamination bond, maintaining a clean, durable interior finish.
READ TECHNICAL DETAIL
The composite system only performs if the materials stay intact. This durable, flame retardant, vinyl facing protects the EPS core and lamination bond from Australia’s harsh climate, resisting fading, cracking and weathering year after year. The result is a clean, professional finish that holds its appearance and structural integrity for the life of the door.
Why Lamination Matters
ThermaDoor panels are factory laminated so the EPS core, UV-stable vinyl face and Sisalation foil backing form one stable composite panel. The layers are designed to move together with the garage door, without loose materials shifting or separating.
Three Layers. One Garage Door Insulation System
Registered Australian Design. Protected under the Designs Act 2003 (Cth). Unauthorised reproduction prohibited.
Allows the natural movement of your garage door.
Won’t break during installation
To understand how garage door insulation works and what to look for, read our garage door insulation guide before you buy.
Built for a Moving Garage Door
Built to Last
A 35mm flame-retardant polystyrene core with a durable vinyl face. Handles the daily movement of a garage door — no sagging, no crumbling, no falling apart.
15 Year Warranty
Every ThermaDoor panel is backed by a 15-year product warranty, covering the EPS core, laminated vinyl facing and Sisalation foil backing. Clear product cover for the original purchaser, subject to the warranty terms.
Fire Resistant
Made with a flame-retardant polystyrene core. Self-extinguishes on contact with flame in accordance with Australian standards for flammability testing.
Lightweight Design
Adds around 7kg to a standard double door. Spring tension is easily adjusted — no structural concerns, no door damage.
Make your garage a more comfortable space all year round.
Get exact DIY pricing online or find professional installation near you.
DIY kits ship Australia-wide · Professional installation available through authorised distributors
Verified Garage Door Insulation R-Values
Calculated on the Complete Installed Door – Not Just the Insulation Material
Surface temperature readings: 37.6°C at the steel hinge (thermal bridge) / 32.6°C at the ThermaDoor panel
What you are seeing: Blue areas show ThermaDoor panels reducing radiant heat transfer; red and orange show heat conducted through steel hinges and panel joins. This is thermal bridging—which is why ThermaDoor’s R-values are calculated for the complete installed door assembly.
Garage Door Insulation for New Homes and Renovations
“
“I’ve been in the garage door industry for 30 years and the ThermaDoor product is the best I’ve seen. The workmanship and quality of the product is excellent, and I have recommended them to many, many people during my time.”
— Ashley, Garage Door Technician
Don't Just Take Our Word For It
See why tens of thousands of Australian homeowners choose the only purpose-built garage door insulation made in Australia.
Ready to make your garage more comfortable?
Get exact DIY pricing online or find professional installation near you.
DIY kits ship Australia-wide · Professional installation available through authorised distributors
Custom Garage Door Insulation Solutions
Have a custom or specialty garage door? We’ve got you covered. Whether it’s a tilt door, RV garage door, airplane hangar door or even acrylic panel doors, ThermaDoor can provide the right insulation solution.
We specialise in tailored garage door insulation for non-standard and oversized openings. Contact us today to discuss your unique door and get expert advice on the best insulation fit.
BUYER’S CHECKLIST
What to Check Before Buying Garage Door Insulation
Before you buy, check that the sytem:
- Publishes clear R-values so you can compare insulation performance with confidence
- States the R-value for an installed garage door assembly, rather than a raw material or wall-insulation figure.
- Supports comfort in summer and winter, with thermal performance suited to changing conditions.
- Maintains an effective air cavity so the insulation system can perform as intended.
- Preserves door movement and spring balance through a fixing method suited to a moving garage door.
- Provides relevant compliance documentation for building, renovation or energy-assessment requirements.
Frequently Asked Questions
Is ThermaDoor the same as wall or ceiling insulation?
No. ThermaDoor is engineered specifically for garage doors — not repurposed wall batts, PIR foam, or foil wraps. Most products sold as garage door insulation are generic building materials adapted to a use they were never designed for. ThermaDoor is purpose-built for the daily movement, weight tolerances, and thermal demands of a sectional or tilt garage door system.
What R-value does ThermaDoor achieve?
ThermaDoor delivers independently calculated R-values of R1.43 (winter) and R1.39 (summer) for the complete installed door assembly — not just the raw material. These values are calculated by a qualified thermal engineer to AS/NZS 4859.1 & 2:2018, the same standard used for NCC and NatHERS compliance.
Will the panels fall out or separate over time?
No. Each panel is factory heat-laminated under pressure — the EPS core, vinyl facing, and Sisalation foil backing are fused into a single rigid unit. There is no glue to fail, no layers to shift, and no assembly required at home. The panels move with the door as one piece for the life of the door.
Will ThermaDoor add too much weight to my garage door motor?
No. A full 16-panel kit adds approximately 7kg to the door — well within the tolerance of any standard garage door motor and spring system. The panels are specifically engineered to be lightweight, avoiding additional strain on springs, hinges, or motors.
Can I install ThermaDoor myself?
Yes. DIY installation on a standard 16-panel sectional door takes approximately 2–3 hours with basic hand tools. No drilling, no glue, no trade skills required. Full step-by-step video guides are included with every kit.
Is ThermaDoor suitable for tilt doors?
Yes. ThermaDoor panels are available in sizes compatible with both sectional and tilt garage doors. Contact us to confirm the correct kit for your door type and dimensions.
Does ThermaDoor reduce noise as well as heat?
Yes. The 35mm high-density EPS core significantly dampens acoustic transfer through the door, reducing street noise, wind noise, and the vibration of the metal door panels — particularly beneficial if you use your garage as a home gym, office, or studio.
Our Videos
Videos & Guides
Below is our step by step video guide on how to insulate your garage door with ThermaDoor Garage Door Insulation – Australia’s original, purpose made garage door insulation.
How to measure your ThermaDoor Garage Door Insulation panels
How to cut your ThermaDoor Garage Door Insulation panels
How to determine ThermaDoor Foam packers required
How to fit your ThermaDoor Garage Door Insulation panels
Tools Required for Installing ThermaDoor Garage Door Insulation
ThermaDoor Time Lapse Installation
Make your garage a more comfortable space all year round.
Get exact DIY pricing online or find professional installation near you.
DIY kits ship Australia-wide · Professional installation available through authorised distributors