Australian-made garage door insulation panels designed to fit new and existing sectional and tilt garage doors across the South Coast & Shoalhaven.
SUNNY 28°C AUTUMN AFTERNOON
44.7°C uninsulated | 30.8°C with ThermaDoor installed
13.9°C COOLER DOOR SURFACE
Independently verified installed-assembly R-values: R1.43 winter / R1.39 summer — backed by an engineering report.
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
Product Warranty
Core: life of door · Vinyl & Foil: 7 years
Designed for sectional and tilt garage doors in new builds, renovations and existing homes.
Include garage door insulation in a new build or renovation to support a more comfortable, energy-conscious home.
Purpose-made panels are sized and fitted to work with the movement and operation of sectional and tilt garage doors.
Choose a DIY garage door insulation kit or arrange professional supply and installation through our South Coast & Shoalhaven authorised distributor network.
Garage door insulation is a practical upgrade for South Coast and Shoalhaven homes. Humid coastal summers and strong afternoon sun can heat sun-exposed steel garage doors, while cooler winter mornings—particularly in inland and elevated areas—can make garages uncomfortable. ThermaDoor provides a purpose-made thermal barrier for new and existing sectional and tilt garage doors, supporting a more stable, comfortable and usable garage throughout the year.
Want to insulate your South Coast & Shoalhaven garage door? You have two options — insulate your own garage with our DIY kit, or arrange supply and installation through an authorised South Coast & Shoalhaven distributor.
DO IT YOURSELF
Want to insulate your own garage in Nowra, Ulladulla, Batemans Bay, Kiama or anywhere across the South Coast and Shoalhaven? 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.
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
ThermaDoor is supplied and installed by authorised distributors across the South Coast and Shoalhaven. Find your nearest distributor below.
ThermaDoor provides garage door insulation across the South Coast and Shoalhaven, with nearby NSW service areas including Wollongong and the Illawarra, the Southern Highlands and Sydney. You can also 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.
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.
QUEENSLAND HOMEOWNER CASE STUDY
44.7°C
DOOR SURFACE TEMPERATURE
Before ThermaDoor
28°C
OUTSIDE AIR TEMPERATURE
30.8°C
DOOR SURFACE WITH THERMADOOR
After ThermaDoor
The South Coast is famous for its beaches, but coastal exposure brings intense summer sun and corrosive salt air. An uninsulated garage door acts as a giant radiator, absorbing heat and pushing it straight into your home. ThermaDoor's EPS core and reflective foil backing work together to block radiant heat and keep the garage usable, while our durable, wipe-clean vinyl finish stands up to coastal conditions far better than exposed materials.
Inland areas across the Shoalhaven, like Nowra and Bomaderry, often miss out on the cooling coastal breezes, experiencing sweltering summer afternoons. ThermaDoor's insulation panels create a thermal barrier that stops the heat transfer. The laminated vinyl finish is water resistant and impact resistant, unlike open-cell insulation materials that absorb moisture and deteriorate over time. Built to handle whatever the South Coast throws at it.
South Coast winters are generally mild, but overnight temperatures can still drop, leaving garages cold and damp in the mornings. ThermaDoor slows heat loss overnight, so stepping into your garage on a winter morning is not the shock to the system it used to be — and your stored gear, tools, and vehicles stay protected from the cold 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 →
With a stable, comfortable temperature year-round, South Coast & Shoalhaven 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.
Our article on thermal bridging and garage doors explains why tested assembly values matter.
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.
Peter Harding shares his experience with ThermaDoor garage door insulation after having it installed three times over 12 years.
ThermaDoor DIY kits deliver to any address on the NSW South Coast and Shoalhaven. Professional installation is available through our authorised distributor network across the region. Whether you are in Nowra, Ulladulla, Kiama or the surrounding coastal and rural areas, ThermaDoor is available to you.
Nowra, Bomaderry, Berry, Kangaroo Valley, Ulladulla, Milton, Mollymook, Sussex Inlet
Kiama, Gerringong, Shellharbour, Batemans Bay, Moruya, Nowra South, Culburra Beach, Huskisson, Vincentia, Sanctuary Point, Jervis Bay, Broulee, Narooma.
DIY kits ship to all South Coast & Shoalhaven postcodes.
Also servicing Wollongong and the Illawarra
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
Yes. ThermaDoor significantly reduces radiant heat transfer during hot summer days in areas like Nowra and Batemans Bay, and helps retain warmth during cool winter nights. Customers regularly report temperature reductions of up to 20°C inside their garage.
No. ThermaDoor panels feature a durable, wipe-clean vinyl finish that is water resistant and built to withstand coastal environments. Unlike some other insulation materials, it will not absorb moisture or degrade from salt air exposure.
Yes. We offer DIY kits that are delivered directly to your home anywhere on the South Coast or Shoalhaven. The panels come pre-cut to standard heights and include clear instructions for a simple installation.
Yes. If you prefer professional installation, we have an authorised distributor, JM Garage Doors, servicing the Shoalhaven region. They can supply and install ThermaDoor for a flawless finish.
ThermaDoor provides an Overall Total R-value of R1.43 in winter and R1.39 in summer. These figures are independently calculated by a qualified engineer in accordance with AS/NZS 4859 Parts 1 & 2.
No. ThermaDoor panels are extremely lightweight. While they do add a small amount of weight to the door, standard garage door springs can easily be adjusted by a professional to accommodate the slight difference.
Yes. The EPS insulation core helps dampen vibrations and reduce noise transmission, making your garage quieter and reducing the amount of street noise that enters your home.
Need more details? See our full Garage Door Insulation FAQs for compliance, R-values and warranty.
BEFORE YOU BUY
Most garage door insulation is marketed using terminology borrowed from walls and ceilings — R-values from raw materials, fixing methods designed for static walls, and compliance claims with no documentation behind them. This free checklist gives you six clear questions to ask before you buy, so you can compare any product — including ours — on the factors that actually matter.
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!
Get exact DIY pricing online or find professional installation near you.
DIY kits ship Australia-wide · Professional installation available through authorised distributors
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.
