Shed Insulation Options
Most people think insulation is just about keeping a shed cooler in summer or warmer in winter.
But here’s what we’ve learned from thousands of projects: the right insulation solution can transform how you use your new steel building year-round.
Without insulation, a shed can often become unbearable by 10 am in an Aussie summer and dripping with condensation in winter.
Add proper insulation, and you’ve got a comfortable year-round workshop, drip-proof storage area, or reliable man cave that works in any season – like “an esky in summer and a thermos in winter.”
Want help working out what you need? Get in touch, and we’ll talk through your specific shed use, climate zone, bushfire rating requirements, and the level of insulation that makes sense for your situation.
We recommend shed insulation for four main reasons:
Temperature control: Quality reflective insulation like Polyair or ThermalFlex reflects up to 95% of radiant heat, making your shed genuinely comfortable to work in during summer. In winter, it prevents heat loss, saving on heating costs.
Condensation protection: This is the hidden benefit most people don’t consider. Insulation systems like Anticon or ThermalFlex minimise moisture buildup and dripping ceilings that can damage stored equipment, vehicles, and the shed structure itself. If you’re storing anything valuable, this matters.
Bushfire compliance: If your property is in a bushfire-prone area, your shed may nee to meet specific Bushfire Attack Level (BAL) requirements. Several of our insulation products – including Bradford Anticon (suitable up to BAL-40), ThermalFlex systems (BAL LOW-FZ), and Thermoseal wraps (BAL 12.5-FZ) – are specifically designed to meet AS 3959 standards for ember attack protection. This isn’t optional in bushfire zones – it’s about protecting your investment and meeting building code requirements.
Safety: When adding skylights to a commercial or residential building, safety mesh must be installed while trades are working on your roof. This is a mandatory fall protection system that becomes a permanent safety feature.
Our Most Popular Shed Insulation Types
| Polyair Performa XHD | Reflective Insulation (Extra Heavy Duty) | Boosts thermal performance, acts as a secondary protective skin for walls and roofs, and incorporates a foam core for enhanced thermal properties. | Reflects up to 95% of radiant heat. Available in nominal thicknesses of 4.0 mm and 8.8 mm. |
| Polyair Unicell | Reflective Insulation & Sarking (Extra Heavy Duty) | High-grade, commercial-grade reflective insulation designed specifically for Australian sheds, maximizing year-round comfort. | Reflects up to 95% of the sun’s radiant heat. Keeps your shed “cooler on the hottest days and warmer on the coldest nights.” |
| ThermalFlex™ 4 | Reflective Insulation, Vapour Barrier, and Radiant Barrier (Extra Heavy Duty) | Provides high thermal performance, helps prevent condensation, and acts as a Water Barrier. Suitable for bushfire-prone areas. | Material Thermal Resistance R0.11. Low flammability; suitable for BALs up to LOW–FZ. Nominal thickness 4.0 mm. |
| ThermalFlex™ 8 | Thermal Break Insulation (Extra Heavy Duty) | Meets National Construction Code (NCC) requirements for an R0.2 thermal break, minimizing condensation and reducing thermal bridging in steel construction. | Material Thermal Resistance R0.2 includes a 150mm overlap piece to minimise wastage and reduce the need for taping joins. |
| Bradford Anticon | Combined Insulation Blanket and Foil | Used primarily under metal roofs to control heat transfer, reduce annoying rain noise (damping effect), and mitigate the risk of condensation formation. | Glasswool composition allows use in BAL roofing systems up to BAL-40. Foil facing meets BCA flammability index. Available in R1.3 (Anticon 60) and R1.8 (Anticon 80) variants. |
| Thermoseal ResiWrap | Wall Wrap & Vapour Barrier (Extra Heavy Duty) | An extra tough weather barrier that defends against rain-related water damage, ideal for high wind and harsh weather climate zones. | Classified as a Class 1 Vapour Barrier and Water Barrier. Extra Heavy Duty classification. Suitable for bushfire-prone regions (BAL 12.5–FZ). |
| Kingspan Ausmesh | Roof Safety Mesh | Serves as the primary means for fall protection when working at heights and supports roof underlays/insulation, becoming a permanent safety feature. | Constructed of 2mm tensile galvanised steel wire. Longitudinal wire tensile strength is minimum 500 MPa. Complies with AS/NZS 4389:2015. Warranted for a period of 10 years. |
| 493 Reinforced Foil Tape | Accessory | Recommended for sealing overlaps, discontinuities, and penetrations in reflective insulation products to maintain weather barrier properties and improve performance. | Available in 48mm and 72mm widths. |