Australian-made garage door insulation panels designed to fit new and existing sectional and tilt garage doors across the Southern Highlands including Bowral, Mittagong, Moss Vale, Goulburn and more.
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 Southern Highlands authorised distributor network.
Garage door insulation is a practical upgrade for Southern Highlands homes. Cold winter nights, frosty mornings and elevated conditions can make garages uncomfortable, while strong summer sun can heat exposed steel garage doors during the day. 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 Southern Highlands garage door? You have two options — insulate your own garage with our DIY kit, or arrange supply and installation through an authorised Southern Highlands distributor.
DO IT YOURSELF
Want to insulate your own garage in Bowral, Mittagong, Moss Vale, Berrima, Bundanoon, Robertson or anywhere across the Southern Highlands? ThermaDoor DIY kits ship direct to your door. Each kit is purpose-built for sectional and tilt garage 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 Southern Highlands. Find your nearest distributor below.
Goulburn
Locked Up Garage Doors
Unit 1A/114 Maud Street, Goulburn NSW 2580
ThermaDoor services the Southern Highlands, with nearby NSW garage door insulation areas including Sydney, Wollongong and the Illawarra, the South Coast and Shoalhaven and Dubbo and Bathurst. 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.
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.
MELBOURNE BUILDER CASE STUDY
47.6°C
UNINSULATED PANEL SURFACE TEMPERATURE
17.4°C
THERMADOOR PANEL SURFACE TEMPERATURE
30.0°C
SURFACE TEMP REDUCTION
From Bowral and Mittagong to Moss Vale, Berrima, Bundanoon and Robertson, Southern Highlands garages can get noticeably cold through winter, especially overnight and early in the morning. An uninsulated garage door allows heat to escape from the garage and can make adjoining rooms, workshops and storage areas less comfortable. ThermaDoor helps slow heat loss and improve garage comfort, so the space feels more usable throughout the colder months.
While the Southern Highlands is known for its cooler climate, summer heat can still build quickly inside garages, especially when the door faces afternoon sun. A bare metal garage door absorbs and radiates heat into the space, making workshops, gyms, storage areas and home offices uncomfortable. ThermaDoor dramatically reduces radiant heat transfer, helping keep your garage more stable through warmer weather.
Many Southern Highlands homes use the garage for more than parking. Whether it is a workshop, home gym, hobby space, storage area or internal access point, temperature swings can affect how comfortable and practical the space feels. ThermaDoor’s purpose-built EPS insulation panels are designed specifically for sectional and tilt garage doors, helping to reduce heat transfer, improve appearance and create a cleaner, more finished garage interior.
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, Southern Highlands 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.
Bowral, Mittagong, Moss Vale, Burradoo, East Bowral, Welby, Braemar, Renwick, Colo Vale, Hill Top, Alpine, Aylmerton, Yerrinbool.
Berrima, New Berrima, Bundanoon, Robertson, Exeter, Sutton Forest, Burrawang, Avoca, Kangaloon, Glenquarry, Wildes Meadow, Fitzroy Falls, Penrose, Wingello.
DIY kits ship to all Wollongong and Illawarra postcodes.
View all New South Wales regions
Use the calculator below to estimate the possible payback and long-term value of insulating a suitable Southern Highlands 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 DIY garage door insulation kits are designed for homeowners who want to insulate their own sectional or tilt garage door without needing a trade. Kits can be delivered to homes across the Southern Highlands, including Bowral, Mittagong, Moss Vale, Berrima, Bundanoon and Robertson. Each kit is made for garage doors and includes the materials needed to complete the installation yourself.
Yes. Southern Highlands homes often experience cold winter mornings, cool overnight temperatures and warm summer afternoons, especially where the garage door faces direct sun. A DIY ThermaDoor kit helps reduce heat transfer through the garage door, making the garage more comfortable and practical for parking, storage, workshops, home gyms and internal access areas.
ThermaDoor DIY kits are suitable for most sectional garage doors and many tilt garage doors. The insulation panels are purpose-built for garage doors, rather than being general building foam or hardware-store insulation adapted for the job. If you are unsure whether your door is suitable, check the door style, panel layout and available clearance before ordering.
Most homeowners can install a ThermaDoor DIY kit in a few hours, depending on the size and style of the garage door. A single garage door is usually quicker, while a double sectional door may take longer because there are more panels to measure, cut and fit. No specialist trade is normally required.
Yes. In cooler Southern Highlands areas such as Bowral, Mittagong and Moss Vale, an uninsulated metal garage door can allow cold air and radiant temperature loss to affect the garage. Insulating the door helps slow heat transfer, reducing the sharp temperature swings that make garages uncomfortable during winter mornings and evenings.
Yes. Even though the Southern Highlands is known for cooler winters, summer sun can still heat a steel garage door very quickly. A west-facing or north-facing garage door can radiate heat into the garage for hours. ThermaDoor insulation helps reduce radiant heat transfer, making the garage more usable during hot afternoons.
Garage door insulation can make these spaces more comfortable, especially when the garage is used as a workshop, gym, hobby area, storage room or home office. It will not turn a garage into a fully conditioned room by itself, but it can significantly reduce one of the largest sources of heat gain and heat loss: the garage door.
Yes. ThermaDoor DIY garage door insulation kits can be delivered throughout the Southern Highlands, including Berrima, Bundanoon, Robertson and surrounding villages. If your property is outside the main towns, delivery may still be available to your postcode.
Professional installation may be available through authorised garage door specialists in the Southern Highlands region. If you prefer not to install the kit yourself, you can enquire about local installation options for Bowral, Mittagong, Moss Vale and nearby areas.
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.
