Australian-made garage door insulation panels designed to fit new and existing sectional and tilt garage doors across Melbourne and Victoria.
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 Melbourne and Victoria authorised distributors.
Garage door insulation is one of the most effective upgrades a Melbourne or Victorian homeowner can make. Melbourne’s changeable climate brings hot summer afternoons, cool winters and significant temperature swings, which can make a steel garage door a major source of heat gain and heat loss. Garage door insulation helps create a more stable and usable space, supporting comfort in the garage and adjoining rooms throughout the year. ThermaDoor provides a purpose-made thermal barrier for new and existing sectional and tilt garage doors across Melbourne and Victoria.
Want to insulate your Melbourne or Victoria garage door? You have two options — insulate your own garage with our DIY kit or arrange supply and installation through an authorised Victorian distributors.
DO IT YOURSELF
Want to insulate your own garage in Melbourne, Geelong, Ballarat, Bendigo, the Mornington Peninsula, Latrobe Valley or anywhere across Victoria? 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 Victoria. Find your nearest distributor below.
We also service Echuca & Moama. 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.
47.6°C
UNINSULATED PANEL SURFACE TEMPERATURE
17.4°C
THERMADOOR PANEL SURFACE TEMPERATURE
30.0°C
SURFACE TEMP REDUCTION
Melbourne's summers are unpredictable but the heat is real. Northerly winds push garage temperatures well past 50°C in an uninsulated space, and west-facing doors cop it hardest. ThermaDoor's EPS core and reflective foil backing work together to block radiant heat and keep the garage usable, whether your door faces north, west, or straight into the afternoon sun.
Victoria's weather swings are hard on uninsulated spaces. Summer heat, autumn rain, cold snaps and everything in between puts pressure on your garage environment year-round. ThermaDoor's laminated vinyl finish is water resistant and impact resistant, unlike open-cell foam, polyester batts, or fibreglass insulation that absorb moisture and deteriorate over time. Built to handle whatever Victoria throws at it.
Melbourne winters are genuinely cold, with overnight temperatures regularly dropping to single digits. 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, Melbourne and Victoria 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.
Matthew converted his garage into a home gym and spent time researching every insulation option on the market before choosing ThermaDoor. Melbourne’s summer northerlies push uninsulated garage temperatures well past 50°C — a home gym becomes unusable without proper insulation. ThermaDoor’s three-layer panel system delivers independently tested R-values that alternatives simply cannot match.
“I took the time to do my research and was able to find ThermaDoor. I can honestly say it was the only product on the market that I felt was actually going to perform to the highest possible standard. It felt like a consultation based on data and not a sales pitch — but it was very interesting to hear about some of the traps of other products who actually will have a significantly inferior performance.”
— Matthew Taylor, Melbourne ⭐⭐⭐⭐⭐ Google Review
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 in Victoria. Professional installation is available through our authorised distributor network across the state. Whether you are in Melbourne’s suburbs, on the Mornington Peninsula, or in regional Victoria, ThermaDoor is available to you.
Brighton, St Kilda, Richmond, Hawthorn, Box Hill, Ringwood, Frankston, Dandenong, Pakenham, Narre Warren, Berwick, Cranbourne, Moorabbin, Glen Waverley, Werribee, Sunshine, Essendon, Brunswick, Coburg, Preston, Thomastown, Epping, Craigieburn, Sunbury
Geelong, Ballarat, Bendigo, Shepparton, Wodonga, Wangaratta, Warrnambool, Mildura, Sale, Traralgon, Mornington, Rosebud, Torquay, Lorne, Echuca, Swan Hill, Horsham, Ararat, Hamilton
DIY kits ship to all Victorian postcodes.
Use the calculator below to estimate the possible payback and long-term value of insulating a suitable Melbourne & Victorian 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 — and Melbourne’s climate is one of the strongest arguments for it. Summer northerlies push uninsulated garage temperatures past 50°C, while winter overnight lows regularly drop to single digits. ThermaDoor’s EPS core and reflective foil backing work in both directions, blocking radiant heat in summer and slowing heat loss in winter. The result is a garage that stays 10 to 15 degrees closer to ambient temperature year-round, which makes a measurable difference to both comfort and energy bills in a home with an attached garage.
Yes. ThermaDoor has a network of authorised distributors across Melbourne and regional Victoria who can supply and install the system professionally.
Yes. ThermaDoor’s laminated vinyl finish is water resistant and impact resistant, which means it handles rain, humidity and temperature swings without absorbing moisture or deteriorating. Unlike fibreglass batts or open-cell foam products that can sag or absorb moisture over time, ThermaDoor panels are purpose-built to maintain performance through the full range of Victorian weather conditions.
Yes — ThermaDoor DIY kits ship to any Victorian postcode, including Geelong, Ballarat, Bendigo, Shepparton, Wodonga, Warrnambool, Mildura, the Mornington Peninsula, Latrobe Valley and all regional areas. Orders are dispatched from our Queensland factory and delivered via standard freight. Most Victorian deliveries arrive within 3 to 5 business days.
ThermaDoor is designed specifically for sectional panel doors and tilt doors, which are the most common garage door types in Victorian homes. It is not suitable for roller doors. If you are unsure whether your door is compatible, check our door compatibility guide or contact us before ordering — we would rather help you confirm fit than have you order the wrong product.
The simplest way to insulate your Melbourne garage is with a ThermaDoor DIY kit, delivered directly to your door. Each kit comes with purpose-built EPS panels sized for your door, a reflective foil backing, and everything you need to complete the job yourself in a few hours — no trades, no adhesives, no special tools. If you prefer to have it done for you, contact us and we will connect you with an authorised ThermaDoor distributor in your area.
Yes. Since May 2024, all new homes and major renovations in Victoria must achieve a 7-star NatHERS energy rating. An uninsulated garage door is a thermal bridge that leaks heat in winter and absorbs it in summer, dragging down your home’s overall efficiency. By installing ThermaDoor, you add a verified assembly R-value of R1.43 (winter) to the largest opening in your home, significantly improving its thermal envelope and helping you align with the new 7-star standards.
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.
