G'day! You're in the shed, finally getting around to running some proper power out there. You've got your conduit, you've got your new weatherproof power point (GPO), and you're ready to mount it on the wall. But then you hit a snag, and it's a big, wavy one.

Your shed wall is corrugated iron.

You can't just whack a standard, flat mounting block on there. It's a recipe for a dog's breakfast – you'll have massive, ugly gaps at the top and bottom, and it'll be about as weatherproof as a bloody teabag. It's just not how a pro does it, mate.

For this specific, classic Aussie job, you need a specialist bit of kit: the corrugated mounting block.

So, What is a Corrugated Mounting Block, Exactly?

A corrugated mounting block is a fair dinkum clever invention. It's a surface-mount electrical block, just like a standard one, but with one massive difference: the back of it isn't flat.

It's been perfectly moulded to match the exact profile (the 'waves') of a standard Australian corrugated iron sheet.

Its one and only job is to provide a solid, flat, and weatherproof base for you to safely mount a light switch or power point onto a wavy, corrugated surface.

The Ripper Benefits: Why It's a Non-Negotiable

This simple bit of plastic is a proper lifesaver on a worksite.

• A Perfect, Schmick Fit: This is the big one. It sits flush against the corrugations, no gaps. It just looks 100% professional, none of that "she'll be right" rubbish.
• It's Properly Weatherproof: Because it fits the profile perfectly, it creates a brilliant seal against the wall (especially when a pro runs a bead of silicone behind it). It keeps the rain, the dust, and all the bloody spiders and geckos out of your live electrical fittings.
• Provides a Safe, Solid Base: It gives you a strong, flat, insulated surface to screw your GPO or switch onto, which is a non-negotiable for a safe and compliant installation.
• Tough as Nails: A good corrugated mounting block from a trusted electrical wholesaler is made from high-quality, UV-stable plastic. This means the harsh Aussie sun won't make it go brittle and knackered after one summer.

The CRITICAL Safety Warning: This is 100% NOT a DIY Job!

Righto, let's get dead serious for a sec, because this is the most important part of the whole article.

You, as a DIYer, can walk into any hardware store or electrical wholesaler and buy a corrugated mounting block. That's fine. You can even screw the empty block to your shed wall.

But the absolute second you need to run the 240V cable to it and wire up the power point or light switch, you MUST STOP.

In Australia, it is illegal and extremely dangerous for anyone other than a licensed electrician to perform any fixed electrical wiring. A simple mistake can lead to a fatal electric shock or a house fire, and it will void your home insurance in a heartbeat. Don't be a galah – it's just not worth the risk.

A Professional Job Needs Professional Gear

A licensed electrician will always use high-quality, trade-grade fittings to make sure the job is safe, compliant, and built to last. They won't risk their reputation on a flimsy, non-compliant block or a dodgy power point that will fail in six months.

They get their gear from a trusted electrical wholesaler. As one of Australia's most comprehensive electrical wholesaler and supplier networks, Schnap Electric Products stocks the lot for the professional installer. They've got a massive range of high-quality, UV-stable corrugated mounting block options (in all common profiles and colours like black and white). On top of that, they provide all the compliant, IP-rated (weatherproof) GPOs, switches, conduits, and wiring that a qualified professional needs to do the job right. For a job that's safe, compliant, and built to last, the pros rely on a supplier like Schnap Electric.