Learn how to install DIY garage door insulation with ThermaDoor panels using our straightforward DIY installation guide. ThermaDoor is a lightweight, purpose-made garage door insulation system designed for sectional and tilt garage doors.
Engineered composite insulation. Independently verified R-values. Built specifically for the mechanics of your garage door.
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
ThermaDoor panels friction-fit into the frame of each garage door panel — no glue, screws, drilling or specialist tools required.
Measure the length and height of each panel on your door. Panels on the same door are often different sizes, so measure every one. You need the largest measurement across all panels to select the right kit.
Browse the ThermaDoor shop to check prices and find the right kit for your door — no obligation to purchase. Select your panel size and quantity when you are ready to order.
ThermaDoor panels arrive slightly larger than your door panels. Use a straight edge and utility knife to trim each panel to fit. Our cutting video below shows the correct technique.
Slide each ThermaDoor panel into the frame of the corresponding door panel. Foam packers hold the panels firmly in place. The door operates exactly as normal once installed.
Your garage is now insulated. ThermaDoor's independently verified dual-season R-value (R1.43 winter / R1.39 summer under AS/NZS 4859.1:2:2018) means your garage stays cooler in summer and warmer in winter.
Learn more about ThermaDoor’s purpose-made spacer system
You only need a few basic household tools to install ThermaDoor panels:
Download our complete DIY garage door insulation installation instructions for a printable step-by-step guide you can take to the garage with you.
Read our guide to choosing a garage door insulation kit
Watch our step-by-step DIY garage door insulation videos, from measuring your garage door panels to trimming, fitting and checking your finished ThermaDoor installation.
Learn how to correctly measure the length and height of each panel, including why panels on the same door are often different sizes.
The correct cutting technique using a straight edge and utility knife for a clean, accurate fit.
How to work out how many foam packers your door needs to hold the panels firmly in position.
The full fitting process from sliding the panel in to confirming the door operates correctly.
A quick overview of the basic household tools you need. No power tools or adhesives required.
Watch a complete installation from start to finish in under two minutes.
Ready to Install DIY Garage Door Insulation?
Measure your garage door panels, choose the right ThermaDoor kit and get your exact DIY price online.
DIY kits ship Australia-wide. Professional installation is available through authorised distributors in selected areas.
The prices below are a guide only. For your exact price including freight to your door, grab a tape measure and use our shop — it takes two minutes, no account needed, and you’ll know exactly what you’re up for before you commit to a thing.
| Door Size | Panels | Price (from) |
|---|---|---|
| Single Door | 8 panels | From $330 |
| Single Door (Large) | 10 panels | From $380 |
| Double Door | 16 panels | From $660 |
| Double Door (Large) | 20 panels | From $760 |
* Prices include GST. Freight not included — calculated at checkout based on your postcode. No obligation to buy.
Most DIYers grab a tape measure and have their exact price in just a couple of minutes
Not ready to measure up just yet? Fill in our enquiry form — allow a few days during busy periods.
Call or send an enquiry below to see if we have an installer in your area.
