GARAGE DOOR INSULATION that works - proudly australian, purpose built
Welcome To ThermaDoor: Australia's Original and Best Garage Door Insulation Solution
Looking to insulate your garage and improve your home’s energy efficiency? Since 2012, ThermaDoor has been Australia’s leading manufacturer and supplier of Australia’s original, and still the only purpose made garage door insulation – designed specifically for sectional and tilt style garage doors.
Whether you’re a homeowner wanting to keep your home cooler in summer and warmer in winter, or a building professional designing for 7-Star NatHERS compliance, ThermaDoor delivers proven thermal performance with style and ease.
The smart choice for garage door insulation in Australia
ThermaDoor Premium range is a high-quality garage door insulation panel, manufactured in Australia using construction grade, flame-retardant expanded polystyrene (EPS). Each panel is finished with a durable, easy to clean vinyl laminate and backed with construction grade reflective foil laminate for added thermal protection.
- Designed for sectional and tilt doors
- Clean, fast installation – no glue, no mess
- Independently calculated R-values (to the most up to date Australian Standards) of R1.48 (winter), R1.43 (summer) – the best R-value for garage door insulation in Australia.
- Ideal for new builds or retrofitting existing doors
- Suits homeowners, builders, energy assessors and architects
ThermaDoor Premium range is made specifically for garage doors. This ensures it performs where you need it most – the garage door.
Improve comfort, energy ratings and cost savings
Adding ThermaDoor garage door insulation to your home or project can:
- Reduce heat gain and loss through the garage door
- Improve thermal comfort in adjacent rooms
- Lower energy bills year round
- Contribute to higher energy ratings under NCC 2022 and NatHERS
From DIY garage door insulation kits to professionally installed solutions, ThermaDoor gives you better performance, better value, and long-lasting results.
ThermaDoor. The garage door insulation construction industry professionals use and trust.
"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
Explore our range, request a quote or shop online for DIY garage insulation kits today.
Dual Season R-Values for Garage Door Insulation (AS/NZS 4859.2:2018)
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). By declaring real-world performance for the whole door (not just the material) and backing it with independent engineering and a purpose-built design for sectional and tilt doors, we make it easy to choose with confidence – clear numbers, comfort all year round and no guesswork.
Your Installation Options
Ready to get started?
ThermaDoor are your leading Australian made garage door insulation specialists.
Option 1
DIY Installation
Choose & install the panels yourself by following our easy how-to videos guides.
Option 2
Supply & Installation
Call, text, or send an enquiry today to see if we have an installer in your area.
*T&C’s apply, not available in all areas.
ThermaDoor Garage Door Insulation DIY Kits
ThermaDoor garage door insulation DIY kits are supplied in our Premium or budge Plain ranges, making it easy to upgrade your sectional garage door with high performance insulation – no special tools or experience required.
Our DIY garage door insulation kits are available in a wide range of sizes to suit all major brands and models of sectional garage doors.
With a few simple measurements we can assist you in determining the right size DIY kits required to insulate your garage door. Cutting your panels to size is easy with no special tools required.
Each kit includes everything you need to install premium quality insulation panels at home. Just fit the included foam packers to each panel section prior to Fitting your insulation panels. It’s that simple.
Your complete kit is delivered straight to your door, anywhere in Australia.
DIY install to a standard 16 panel door is approximately 2-3 hours.
Testimonials
Comments from our DIY’ers
Hear feedback and comments from our DIY customers.
ThermaDoor Supply & Install
If you’re thinking I’d like a hassle-free way to insulate my garage with high performance thermal panels, you’ve come to the right place. ThermaDoor are your leading Australian made garage door insulation specialists.
As Australia’s original, purpose made garage door insulation specialists, ThermaDoor delivers industry leading performance, trusted by homeowners and construction industry professionals alike. Whether you’re retrofitting an existing door or planning for a new build, our team can guide you from quote to completion.
Get in touch today and we can provide you with a free, no obligation quote on installing your panels.
We also have a skilled network of professional, fully trained and authorised distributors right around Australia to assist you. Our guarantee is to provide you with professional service and quality workmanship every time.
Lead times may vary by region and season, so we recommend contacting us early, especially during peak demand months.
ThermaDoor Garage Door Seals & Thresholds
Cobra seal – Bottom of door protection
A heavy bottom of door seal designed to protect your garage from the elements, even on uneven floors. Effectively blocks rain and wind, dust and debris, smoke and fumes, and even coastal salt and corrosion.
External garage door seals – Top and Side Protection
Our external garage door seals reduce airflow into the garage by up to 96% and will provide excellent service and an extremely effective solution to eliminating all those annoying undesirable intrusions, dust, draughts, flying, crawling, slithering pests and of course seal out hot and cold winds. Available in fire retardant for bush fire zoned areas.
Seal smart. Live better. Upgrade with ThermaDoor.
Testimonials
Customer Reviews
It is our guarantee to provide you with professional service and quality workmanship every time, here is some feedback from our clients.
Made In Australia
Why Choose ThermaDoor?
ThermaDoor is a premium range garage door insulation, invented and manufactured by an Aussie builder specifically for the harsh Australian climate. It is the ORIGINAL PURPOSE MADE garage door insulation available on the Australian market. Our ‘Premium Range’ offers:
Durability
Your garage door is a constant moving part. Insulation installed into your door is susceptible to deterioration whether it be pets scratching it, rodents eating it or just getting knocked around by everyday living. ThermaDoor garage door insulation is a construction grade 35mm thick, flame-retardant polystyrene core. The face of our panel is laminated with a durable, easy-clean white vinyl face that adds protection, and looks great too!
Additional thermal protection
The back of the panel is laminated with a builder’s grade sisalation foil – the same foil that most homes are wrapped with for your thermal protection. This foil backing faces the garage door, providing additional thermal protection to your garage space. Some customers have reported up to a 15-degree internal air temperature difference in their garage.
Energy efficiency
ThermaDoor garage door insulation helps maintain a stable internal temperature in your home during winter and summer, enhancing energy efficiency and potentially reducing costs. According to the Australian Government’s YourHome Website, a well-insulated home may cut cooling and heating bills by up to half. With a tested thermal value of R1.48, ThermaDoor garage door insulation minimizes the effects of our harsh Australian climate, by reducing heat loss and heat gain transferring through your sectional garage door.
Noise reduction
ThermaDoor garage door insulation adds an additional layer of thickness to your garage door, reducing sound transfer in and out of your garage. Our customers often also report that the door itself is much quieter after installation.
Increased comfort
ThermaDoor garage door insulation creates a more stable, constant temperature, making a more comfortable environment to utilise this space all year round.
Light weight
ThermaDoor garage door insulation adds approximately 7 – 8 kg of weight to a standard double garage door. This additional weight is easily accommodated by adjusting the springs after installation.
Fire resistant
ThermaDoor garage door insulation is made with a flame-retardant polystyrene panel. This means our panel will self-extinguish if exposed to a flame.
DIY and supply & install options available
If you’re ready to dive into the DIY world, we’ve got tons of resources just for you. But if you’re still feeling a bit ‘iffy’ about it, don’t worry! We have a network of professional distributors across Australia ready to lend a hand.