DIY kits delivered anywhere in Sydney North
Professional installation via our authorised distributors.
Australia's Original
AS/NZS 4859.2:2018
Licence 7177
For Garage Door Systems
ThermaDoor is designed and manufactured in Queensland, with our factory at Chevallum on the Sunshine Coast. When you order a ThermaDoor DIY kit for delivery to Sydney North, you are buying Australian made insulation from a business that has engineered its product specifically for the Australian climate — not an imported generic kit adapted for local conditions.
From the humid coastal suburbs of Manly and Dee Why to the hotter western pockets of Hornsby and Pennant Hills, ThermaDoor dramatically reduces radiant heat transfer, keeping your garage significantly cooler in summer.
Sydney's North Shore and Northern Beaches face a double challenge: intense summer heat combined with coastal humidity and salt-laden air year-round. ThermaDoor's laminated vinyl finish is water resistant and impact resistant, unlike open-cell foam or polyester batts that absorb moisture and deteriorate over time.
Even in Sydney's mild winters, overnight temperatures on the Northern Beaches and upper North Shore can drop sharply. ThermaDoor slows heat loss overnight, so stepping into your garage on a winter morning is no longer a shock — and your stored gear, tools, and vehicles stay protected from the cold year-round.
With a stable, comfortable temperature year-round, Sydney North’s homeowners are reclaiming their garages as usable living spaces.
Here is how ThermaDoor changes what you can do with your garage.
Train comfortably year-round — no more sweltering summers or chilly winters.
Quieter, more stable temperatures for better focus and lower energy bills.
A retreat that stays cool in summer and warm in winter for real downtime.
Consistent conditions that protect materials and make projects more enjoyable.
A safer, more comfortable space for children’s play – fewer drafts and hot/cold spots.
A calmer climate for pets, reducing heat stress in summer and chills in winter.
ThermaDoor has been on the Australian market since 2012 — and in that time, no other brand has matched what we offer:
Our article on thermal bridging and garage doors explains why tested assembly values matter.
Are you a builder, architect, or energy assessor? View our Trade & Industry Hub for full NatHERS and NCC 2022 compliance data.
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, year after year.
Durable, flame retardant, UV-resistant vinyl facing protects the panel from Australia's harsh climate. It resists fading, cracking, and weathering — delivering a clean, professional finish that holds its appearance and structural integrity for the life of the door.
Bonded to the back of every panel, this construction-grade foil reflects radiant heat, acts as a Class 2 vapour barrier, and achieves Group 1 fire performance classification. It's the same foil used to wrap Australian homes — completing the three-layer system.
Registered Australian Design. Protected under the Designs Act 2003 (Cth). Unauthorised reproduction prohibited.
Want to insulate your Sydney North garage door? You have two options — insulate your own garage with our DIY kit, or let us insulate your garage through an authorised local distributor. Same product, same quality, same result.
DO IT YOURSELF
Want to insulate your own garage in Chatswood, Manly, Hornsby, Dee Why or anywhere across the North Shore and Northern Beaches? ThermaDoor DIY kits ship direct to your door. Each kit is purpose-built for sectional and tilt doors and comes with everything you need to complete the job yourself in a few hours. No trades required.
Not sure if garage door insulation is right for you? Read why garage door insulation is worth it in Australia.
Our DIY kits come with everything you need for a straightforward installation. Pricing is based on the number of panels required for your door, does not include freight.
| Door Size | Panels | Price (from) |
|---|---|---|
| Single Door | 8 panels | From $290 |
| Single Door (Large) | 10 panels | From $340 |
| Double Door | 16 panels | From $580 |
| Double Door (Large) | 20 panels | From $680 |
WE DO IT FOR YOU
Rather let us insulate your garage for you? ThermaDoor is supplied and installed by authorised distributors across Sydney North. Find your nearest distributor below.
Looking for other areas? See our list of professional distributors Australia wide.
Chatswood, Hornsby, Gordon, Pymble, Turramurra, St Ives, Wahroonga, Waitara, Berowra, Asquith, Mount Colah, Pennant Hills, Thornleigh, Normanhurst, Epping, Ryde, Lane Cove, Willoughby, Artarmon, Crows Nest, North Sydney.
Manly, Dee Why, Brookvale, Narrabeen, Mona Vale, Avalon, Newport, Warriewood, Frenchs Forest, Belrose, Terrey Hills, Curl Curl, Freshwater, Collaroy, Cromer, Allambie Heights.
DIY kits ship to all North Sydney postcodes.
BEFORE YOU BUY
Most garage door insulation products are marketed using terminology borrowed from walls and ceilings. This free checklist gives you the five questions that cut through the noise — and that most suppliers cannot answer.
See why over 20,000 Australian homeowners choose the only purpose-built garage door insulation made in Australia.
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Karen and the crew were fantastic to deal with from start to finish. The product is amazing and has decreased the temperature in our garage by 10–15 degrees C and also decreased the temp in our house. It was super easy to self install. Massive thumbs up!”
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“Our garage was very hot and a suggestion from a friend meant that we contact ThermaDoor. From the initial contact to the completion, the company was very professional. The product is very good and I would definitely get their team to install. Today Don arrived on time and got the job done very quickly. The addition of the door seals was a good decision as they remove any dust and breeze that used to come through the sides and top.”
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“Garage temps have dropped 4–6°C since installation and so glad we installed the ThermaDoor panels. We built a new house in 2023/2024 and the garage door gets full western sun every afternoon. I made sure to take note of our garage temps before installation and noticed immediately after installation the temp dropped 4–6°C in summer and in winter it’s not as cold. I also noticed the noise is reduced.”
⭐⭐⭐⭐⭐
“Everything about ThermaDoor was fantastic. Easy online ordering, fast interstate delivery and DIY installation was straightforward and a breeze. I would recommend the business and the product.”
Ready to transform your garage?
Yes. Sydney’s summer heat, combined with coastal humidity on the Northern Beaches and the urban heat effect across the North Shore, can push garage temperatures well above 40°C. ThermaDoor’s independently tested panels reduce radiant heat transfer by up to 90%, keeping your garage significantly cooler in summer and warmer on cool winter mornings.
ThermaDoor is the only garage door insulation in Australia with independently calculated dual-season door assembly R-values: R1.43 (winter) and R1.39 (summer), tested to AS/NZS 4859.2:2018. These are full assembly values — not just the raw material — so they reflect real-world performance once installed in your door.
Both options are available in Sydney North. You can order a complete DIY kit delivered directly to your door and install it yourself in a few hours using basic tools. Alternatively, our authorised distributors Bax Garage Doors in Hornsby and Gem Garage Doors in Brookvale can supply and professionally install your insulation for you.
ThermaDoor’s laminated vinyl facing is UV-stable, water resistant, and impact resistant. Unlike open-cell foam or polyester batts that absorb moisture and deteriorate in humid coastal conditions, ThermaDoor panels are designed to perform in exactly these environments — including the salt air and humidity common across the Northern Beaches.
Yes. ThermaDoor is proudly Australian owned and manufactured. Every panel is produced locally and independently tested to Australian Standards, making it the only purpose-built garage door insulation designed and made in Australia.
Need more details? See our full Garage Door Insulation FAQs for compliance, R-values and warranty.
Below is our step by step video guide on how to insulate your garage door with ThermaDoor Garage Door Insulation – Australia’s ONLY PURPOSE MADE garage door insulation!
Call, text, or send an enquiry below to see if we have an installer in your area.
