DIY kits delivered anywhere in Coffs Harbour & Northern Rivers
Single door from $330 | Double door from $660
Professional installation via our authorised distributors
Coffs Harbour | Grafton | Lismore | Ballina | and more
Est. 2012
Australia's Original
Independently Tested
AS/NZS 4859.2:2018
Australian Made
Licence 7177
Composite Technology
Purpose Built for Garage Doors
Verified R1.43 – independently tested by a qualified thermal engineer. Full test report available to view
From the humid coastal stretches of Coffs Harbour to the intense summer sun of the Tweed Valley, ThermaDoor dramatically reduces radiant heat transfer, keeping your garage significantly cooler during long, sticky summers.
The Northern Rivers is known for heavy seasonal rainfall and high humidity. ThermaDoor's laminated vinyl finish is water-resistant and won't absorb moisture, unlike open-cell foam or polyester batts that can sag, degrade, and hold dampness over time.
Inland areas like Lismore, Casino, and the hinterland experience sharp overnight temperature drops in winter. ThermaDoor slows heat loss overnight, so stepping into your garage on a winter morning is no longer a shock — and your stored gear stays protected year-round.
ThermaDoor gives builders, homeowners and energy assessors verified garage-door assembly R-values, backed by an independent engineering report, to review when the garage affects comfort, heat transfer or adjoining living areas — whether for a new build, renovation or existing home. Ask any supplier for their engineering report.
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.
Are you a builder, architect, or energy assessor? View our Trade & Industry Hub for full NatHERS and NCC compliance data.
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.
Want to insulate your 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 Coffs Harbour, Lismore, Byron Bay, Ballina or anywhere across the Northern Rivers? 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.
Not sure if garage door insulation is right for you? Read why garage door insulation is worth it in Australia.
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.
WE DO IT FOR YOU
Rather let us insulate your garage for you? ThermaDoor is supplied and installed by authorised distributors across Coffs Harbour & Northern Rivers. Find your nearest distributor below.
ThermaDoor services Coffs Harbour and the Northern Rivers, with nearby NSW service areas including the Mid North Coast and New England & Snowy Mountains. For Sydney and Greater Metro installation options, visit our Sydney garage door insulation page, or view all NSW locations on our New South Wales garage door insulation page.
Looking for other areas? See our list of professional distributors Australia wide.
Use the calculator below to estimate the possible payback and long-term value of insulating a suitable Sydney garage door with ThermaDoor.
These estimates apply to ThermaDoor only and cannot be assumed for other products used as garage door insulation.
Your climate affects how much thermal load your garage door creates and how much insulation can help.
Larger doors have more surface area, so insulation has a greater impact on thermal load.
These factors determine how much the garage door's thermal performance affects your living spaces and energy use.
Your electricity rate
Your results are ready
Based on your inputs
Thermal performance — before & after
Without ThermaDoor
R0.0
Uninsulated steel door
No thermal resistance
ThermaDoor
R1.43
Winter assembly R-value
R1.39 summer
AS/NZS 4859.1 & 4859.2:2018
What ThermaDoor does for your door
Estimated annual energy saving
$250 – $450
Typical estimate · per year
Kit cost (DIY)
—
Typical payback
—
10-yr return
—
Calculated for ThermaDoor only — Australia's original purpose-made, independently tested garage door insulation
Conservative
$120 – $250
per year
Typical
$250 – $450
per year
High Usage
$450 – $700+
per year
Return on investment — based on your DIY kit price
| Scenario | Annual saving | Payback | 10-yr saving |
|---|
Kit from $330 inc. GST. Freight additional — calculated at checkout.
Your inputs
Peter Harding shares his experience with ThermaDoor garage door insulation after having it installed three times over 12 years.
Real results for real Coffs Harbour & Northern Rivers 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, Coffs Harbour & Northern Rivers 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. As the primary insulator in the composite system, it works in tandem with the foil and air cavity to deliver the verified assembly R-value.
Laminated to the back of every panel, this construction-grade foil reflects radiant heat back across the internal air cavity — the gap maintained by ThermaDoor's purpose-made foam packers. The foil only works because the gap is engineered. Together they form the reflective half of ThermaDoor's composite technology. The foil also acts as a Class 2 vapour barrier and achieves Group 1 fire performance classification — it's the same foil used to wrap Australian homes.
The composite system only performs if the materials stay intact. This durable, flame retardant, UV-resistant 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.
Coffs Harbour, Sawtell, Woolgoolga, Toormina, Moonee Beach, Coramba, Bellingen, Urunga, Nambucca Heads, Macksville.
Lismore, Ballina, Byron Bay, Tweed Heads, Casino, Kyogle, Murwillumbah, Kingscliff, Lennox Head, Alstonville, Mullumbimby, Ocean Shores.
DIY kits ship to all Coffs Harbour & Northern Rivers postcodes.
Also servicing Mid North Coast NSW
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. ThermaDoor DIY kits ship directly to any residential or commercial address across Coffs Harbour, Lismore, Ballina, Byron Bay, Tweed Heads and all surrounding Northern NSW postcodes. Delivery is handled via standard courier and most orders arrive within a few business days.
Yes. Professional installation is available through our network of authorised ThermaDoor distributors operating across Northern NSW. They can supply and install the panels directly into your existing garage door.
Absolutely. ThermaDoor panels feature a high-density EPS core backed by construction-grade sisalation foil, which acts as a Class 2 vapour barrier. The vinyl facing is water-resistant and won’t absorb moisture or humidity, making it ideal for the coastal Northern NSW climate.
ThermaDoor is designed to fit standard sectional and tilt garage doors from all major Australian manufacturers, including B&D, Steel-Line, Gliderol, Centurion, and Taurean.
Most homeowners can install a ThermaDoor DIY kit on a standard double garage door in 2 to 3 hours. The kit includes pre-cut panels, a specialised cutting tool, and comprehensive instructions.
Yes. ThermaDoor is independently tested to AS/NZS 4859.1 and AS/NZS 4859.2:2018. It is the only garage door insulation kit in Australia with verified dual-season assembly R-values of R1.43 (winter) and R1.39 (summer).
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 or send an enquiry below to see if we have an installer in your area.
