DIY kits delivered anywhere on South Coast & Shoalhaven NSW
Professional installation via our authorised distributors.
Australia's Original
AS/NZS 4859.2:2018
Licence 7177
For Garage Door Systems
Building to 7 stars? ThermaDoor is the only garage door insulation with the engineering documentation your energy assessor needs.
ThermaDoor is designed and manufactured in Queensland, with our factory at Chevallum on the Sunshine Coast. When you order ThermaDoor for South Coast & Shoalhaven, you are buying Australian made insulation from a business that has engineered its product specifically for the Australian climate.
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.
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.
ThermaDoor has been on the Australian market since 2012 — and in that time, no other brand has matched what we offer:
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.
| What We Test | ThermaDoor Standard |
|---|---|
| R-Value Type | Full door assembly value — not just the insulation material |
| Testing Standard | AS/NZS 4859.1 & AS/NZS 4859.2:2018 |
| Season Specificity | Dual-season: R1.43 (winter) / R1.39 (summer) |
| Independent Verification | Qualified thermal engineer report — download link below |
| Air Gap | Purpose-built thermal break between panel and door |
| Includes Steel & Hinges | Yes — tested on the complete installed door assembly |
On the South Coast & Shoalhaven, the difference between a material R-value and a tested door assembly R-value is the difference between a product that looks good on paper and one that actually keeps your garage cooler. ThermaDoor’s R1.43 is tested on a complete installed door — steel, hinges, and all.
Our article on thermal bridging and garage doors explains why tested assembly values matter.
Are you a builder, architect, or energy assessor? View our Trade & Industry Hub for full NatHERS and NCC 2022 compliance data.
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.
Durable, flame retardant, UV-resistant vinyl facing protects the panel from Australia's harsh climate. It resists fading, cracking, and weathering — delivering a clean, professional finish that holds its appearance and structural integrity for the life of the door.
Bonded to the back of every panel, this construction-grade foil reflects radiant heat, acts as a Class 2 vapour barrier, and achieves Group 1 fire performance classification. It's the same foil used to wrap Australian homes — completing the three-layer system.
Registered Australian Design. Protected under the Designs Act 2003 (Cth). Unauthorised reproduction prohibited.
Want to insulate your South Coast & Shoalhaven 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 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.
Answer 4 quick questions — we'll tell you exactly which kit fits your door and what it costs.
Your door brand determines the panel thickness required.
What is your panel thickness?
Count the individual panel sections across the full width of your door.
Measure every panel, then enter the largest measurement below.
⚠ Measure every panel before entering anything
Panels on the same door are often different sizes. If you only measure one panel and it turns out not to be the largest, your kit will be too small. Measure all panels first, then enter the longest length and largest height below.
Your price is ready
Based on your measurement
Kit price
—
Order details
ThermaDoor panels are trimmed to fit. Always cut panels to size during installation — never force an oversized panel.
Before you order — confirm your shop selections
The shop dropdown defaults to a random size. Tick each item below to confirm you have changed it to the correct value.
WE DO IT FOR YOU
Rather let us insulate your garage for you? ThermaDoor is supplied and installed by authorised distributors across South Coast & Shoalhaven. Find your nearest distributor below.
Looking for other areas? See our list of professional distributors Australia wide.
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
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.
See why tens of thousands of Australian homeowners choose the only purpose-built garage door insulation made in Australia.
Peter Harding shares his experience with ThermaDoor garage door insulation after having it installed three times over 12 years.
Ready to transform your garage?
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.
Below is our step by step video guide on how to insulate your garage door with ThermaDoor Garage Door Insulation – Australia’s original purpose made garage door insulation!
Call, text, or send an enquiry below to see if we have an installer in your area.
