Insulation Choices for Your Big Shed

Planning a Big Shed and thinking about insulation? That’s a smart move!

Sheds cop the full force of the weather; blistering summer heat, cool overnight temps, and everything in between. Without insulation, a steel shed heats up fast during the day and loses that heat just as quickly once the sun goes down. That swing in temperature doesn't just make the space uncomfortable; it leads to condensation, moisture build-up, and over time it can wear down whatever you've got stored inside.

Insulation helps stabilise those conditions, keeping the temperature more consistent, protecting your gear, and making the shed far more usable year-round.

Reflective Foil Insulation

This is a popular choice for Aussie sheds, especially in hotter areas. Reflective foil insulation works by bouncing radiant heat away, keeping your shed cooler during those blazing summer days. It’s lightweight, easy to install between steel frames, and helps reduce heat buildup without adding bulk.

Best For ☀️: Hot sunny climates that take on direct sun most of the day. Ideal if your main concern is heat buildup and keeping interior temps cooler in places like Darwin, Broome, Alice Springs, or Perth. Great for garages, storage sheds, or spaces you don’t occupy full-time but still want to keep cooler.

We recommend using Fletcher Insulation Sisalation® Foam Cell Multipurpose. It reflects 95% of radiant heat due to advanced thermal performance and allows for easy installation.

If you’re interested in including it in your Big Shed plans, do let your Big Shed expert know.

Polyester or Glass Wool Batts

For those in cooler climates or places with big temperature swings, bulk insulation like polyester or glass wool batts are excellent. They trap air to slow heat transfer, keeping warmth inside during winter and the heat out in summer. They fit neatly between wall studs or roof rafters and are often used in shed kits.

Best For ❄️: Cooler regions or areas with big day-night temp changes. Perfect if you want your shed usable all year, like in Canberra, Hobart, Launceston, or the Southern Highlands. Works well for workshops and hobby spaces you’re bound to spend long periods in.

Easyshed Big Shed offers Fletcher Insulation Permastop® Building Blanket. It’s made out of FBS-1 Glasswool Bio-Soluble Insulation® and manufactured from up to 80% recycled content, guaranteeing a sustainable, eco-friendly insulation choice that’s safe for use.

Ask your Big Shed expert about it!

Closed-Cell Spray Foam Insulation

If you want top-notch protection, closed-cell spray foam ticks all the boxes. It’s great at sealing gaps, preventing moisture, and provides a high thermal resistance (R-value, for those in the know). Its dense structure stops moisture and condensation, making it ideal for humid or coastal areas. Plus, it’s rigid and dense once it cures. This extra rigidity reduces flexing or vibration in the panels and makes the shed feel more solid.

‍Info Tidbit💡: R-value measures how well insulation keeps heat in or out. The higher the value, the better your shed stays cool in summer and warm in winter.

‍Best For 💦: High-moisture environments or sheds where condensation is a major issue. Great for coastal areas and tropical or humid climates, such as Cairns, Townsville, Brisbane, and Sydney’s northern beaches. A top choice for fully enclosed sheds used to store gear, machinery, or workshop tools.

Foam Board Insulation

Foam board insulation is another solid choice. Also known as “rigid panels”, these are stiff, lightweight panels made from various types of foam used for walls and floors. It’s moisture-resistant and easy to cut to size. These panels provide good thermal insulation and are especially useful if you want a clean, finished look inside your shed.

Best for 💼: Sheds where you want insulation plus a clean internal finish. Looks great in offices, studios, or upgraded sheds in any moderate climate similar to Melbourne, Adelaide, and Gold Coast.

Making the Right Choice

Choosing the right insulation for your Big Shed is about balancing comfort, durability, and cost. Easyshed’s Australian-made custom steel buildings will provide top quality protection and get the job done.

Ask your Big Shed expert about available options and make your Big Shed a comfortable, energy-efficient space all year round!