DIY kits delivered anywhere in Wollongong & Illawarra
Professional installation via our authorised distributors.
Australia's Original
AS/NZS 4859.2:2018
Licence 7177
For Garage Door Systems
Building to 7 stars? ThermaDoor is the only garage door insulation with the engineering documentation your energy assessor needs.
ThermaDoor delivers tested, purpose-built results.
ThermaDoor is designed and manufactured in Queensland, with our factory at Chevallum on the Sunshine Coast. When you order a ThermaDoor kit to Wollongong and Illawarra, you are buying Australian made insulation from a business that has engineered its product specifically for the Australian climate.
From the humid beachside suburbs of Wollongong and Shellharbour to the warmer inland areas around Dapto and Albion Park, Illawarra summers are intense. ThermaDoor dramatically reduces radiant heat transfer, keeping your garage significantly cooler through the hottest months.
The Illawarra coastline means garages are exposed to moisture-laden, salt-heavy air year-round. An uninsulated metal door absorbs heat and allows condensation to build up inside. 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.
Cold air rolls down from the Illawarra Escarpment overnight in winter, making garages in suburbs like Figtree, Keiraville and Helensburgh significantly colder than the coast. 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.
NSW's NCC 7-star energy requirements now apply to all new homes and major renovations. An uninsulated garage door performs at approximately R0.0 — one of the biggest thermal liabilities in any home. ThermaDoor is the only garage door insulation in Australia with independently calculated assembly R-values to AS/NZS 4859.2:2018. When your builder or energy assessor asks about garage door insulation, ask for ThermaDoor by name.
Read more about why winter is one of the strongest arguments for garage door insulation →
For Deborah’s son, an NDIS participant, the garage is “The Cave” — a vital space for his independence and his support team. They had already invested in an epoxy floor and replastering to create something special. But the heat made it almost unusable.
28°C
OUTSIDE AIR TEMPERATURE
44.7°C
DOOR SURFACE TEMPERATURE
30.8°C
DOOR SURFACE WITH THERMADOOR INSTALLED
Australia’s original purpose-built garage door insulation — independently tested, made to fit, built to last.
Surface temperature readings: 37.6°C at the steel hinge (thermal bridge) / 32.6°C at the ThermaDoor panel
What you are seeing: The blue areas show ThermaDoor panels doing their job — blocking radiant heat. The red and orange areas are the steel hinges and panel joins conducting heat straight through the door. This is thermal bridging, and it happens in every sectional garage door. It is why material R-values alone do not tell the full story — and why ThermaDoor’s R-values are calculated on the complete installed door assembly, steel and all.
Our article on thermal bridging and garage doors explains why tested assembly values matter.
In Wollongong and the Illawarra, the difference between a material R-value and a tested door assembly R-value is the difference between a product that looks good on paper and one that actually keeps your garage cooler. ThermaDoor’s R1.43 is tested on a complete installed door — steel, hinges, and all.
Are you a builder, architect, or energy assessor? View our Trade & Industry Hub for full NatHERS and NCC 2022 compliance data.
Want to insulate your Wollongong or Illawarra 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 Wollongong, Shellharbour, Kiama, Dapto or anywhere across the Illawarra? 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.
These are indicative prices only. For your exact price including freight, take a few measurements and use the shop — no account required. Prefer to send us your door details? We’ll send you a DIY quote within a few days.
| 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 |
* Prices include GST. Freight not included — calculated at checkout based on your postcode. No obligation to buy.
WE DO IT FOR YOU
Rather let us insulate your garage for you? ThermaDoor is supplied and installed by authorised distributors in the Wollongong and Illawarra region. Find your nearest distributor below.
ThermaDoor services Wollongong and the Illawarra, with nearby NSW garage door insulation areas including Sydney, the Southern Highlands and the South Coast and Shoalhaven. For the full state-wide service overview, visit our New South Wales garage door insulation page.
Looking for other areas? See our list of professional distributors Australia wide.
Peter Harding shares his experience with ThermaDoor garage door insulation after having it installed three times over 12 years.
Real results for real Wollongong homeowners
I had my west facing garage door insulated and sealing brushes added to stop dust, some of the best money I have ever spent on a house improvement. Great service, efficient and reasonably priced. I would recommend in a flash.
We’re super impressed with our newly-installed Thermadoor insulation, it works a treat on our north-facing garage door and looks very sharp. Top marks for customer service and Caleb’s very neat and tidy job on the install. Highly recommend this outfit
This is a great product and service. Installed them myself and they work amazingly well. Great price compared to other companies who quoted me and Peter was super helpful in getting the sizing just right. Thoroughly recommend this product and company.
Australia’s original purpose-built garage door insulation — independently tested, made to fit, built to last.
With a stable, comfortable temperature year-round, Wollongong and Illawarra 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:
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.
Wollongong, Figtree, Keiraville, Fairy Meadow, Thirroul, Bulli, Corrimal, Towradgi, Balgownie, Mount Keira, Unanderra, Coniston, Port Kembla, Warrawong, Lake Illawarra.
Shellharbour, Albion Park, Dapto, Oak Flats, Kiama, Gerringong, Berry, Jamberoo, Minnamurra, Dunmore, Flinders, Haywards Bay, Barrack Heights, Blackbutt.
DIY kits ship to all Wollongong and Illawarra postcodes.
View all New South Wales regions
Australia’s original purpose-built garage door insulation — independently tested, made to fit, built to last.
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.
Yes, and it works particularly well here. The Illawarra combines coastal humidity with strong summer sun and cold escarpment air in winter, which means uninsulated garage doors heat up fast in summer and lose warmth quickly overnight. ThermaDoor’s EPS core dramatically reduces heat transfer through the door panels, keeping your garage cooler in summer and warmer in winter. It is independently tested to Australian Standards with an R-value of R1.43 (winter) and R1.39 (summer).
You can absolutely do it yourself. ThermaDoor DIY kits are designed for homeowners with no trade experience. Most people complete a standard double garage door in two to three hours using only basic tools — a tape measure, straight edge and a sharp utility knife. Full installation instructions are included, and video guides are available on our website.
ThermaDoor panels are designed to fit the vast majority of sectional garage doors sold in Australia, including B&D, Steel-Line, Gliderol, Centurion and most other common brands. The panels are trimmed to fit the exact dimensions of your door’s indentations, so they work across a wide range of door sizes and styles.
No. ThermaDoor’s laminated vinyl facing is moisture resistant and will not absorb humidity or salt air. Unlike open-cell foam or polyester batts, our panels will not swell, rot or deteriorate in coastal conditions. They wipe clean easily and are built to last in the Australian environment.
ThermaDoor has an authorised distributor in Wollongong — Impact Garage Doors at 1/56 Swans Street, Wollongong. They can supply and professionally install ThermaDoor insulation across the Wollongong and Illawarra region. Their contact details are listed on this page.
Yes. ThermaDoor is 100% Australian made and owned, manufactured to withstand the full range of Australian climates. Our insulation has been independently tested to the most current Australian Standards and has been protecting Australian garages since 2012.
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.
