DIY kits delivered anywhere on the Central Coast
Single door from $330 | Double door from $660
Professional installation via our authorised distributors
Gosford | Wyong | Terrigal | Tuggerah | 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 beaches of Terrigal and Avoca to the warmer inland suburbs around Gosford and Somersby, Central Coast summers are intense. ThermaDoor dramatically reduces radiant heat transfer, keeping your garage significantly cooler through the hottest months.
The Central Coast's proximity to the ocean means garages are exposed to moisture-laden 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.
Winter nights across the Central Coast can drop sharply, particularly in the valleys behind 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.
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 Central Coast 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 Gosford, Wyong, Terrigal, Woy Woy or anywhere across the Central Coast? 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
Rather let us insulate your garage for you? ThermaDoor is supplied and installed by authorised distributors on the Central Coast Find your nearest distributor below.
ThermaDoor provides garage door insulation across the Central Coast, with nearby NSW service areas including Sydney, Newcastle, and the Hunter Valley. 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.
Use the calculator below to estimate the possible payback and long-term value of insulating a suitable Central Coast 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 Central Coast 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, the Central Coast’s 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.
Gosford, Terrigal, Woy Woy, Umina Beach, Erina, Kariong, Somersby, Kincumber, Avoca Beach, Copacabana, Ettalong Beach, Wyoming, East Gosford, Point Clare, Narara, Niagara Park.
Wyong, Tuggerah, The Entrance, Bateau Bay, Killarney Vale, Toukley, Lake Haven, Ourimbah, Berkeley Vale, Chittaway Bay, Warnervale, Gorokan, Budgewoi, Norah Head, Long Jetty, Shelly Beach.
DIY kits ship to all Central Coast 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 Central Coast combines coastal humidity with strong summer sun, which means uninsulated garage doors heat up fast and stay hot. 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 four authorised distributors serving the Central Coast and Lake Macquarie region. Affordable Openings in Tuggerah and Novacoast Doors & Gates in Morisset cover the Central Coast directly, while Macquarie Garage Doors in Gateshead and Newcastle Garage Door Service in Beresfield also service the northern Central Coast and Lake Macquarie fringe. 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 or send an enquiry below to see if we have an installer in your area.
