Asgard metal shed extensions

Grow Your Asgard Shed with Modular Extensions

Asgard’s heavy-duty steel sheds already have a huge capacity, but what if you need even more space? Good news: our Centurion and Gladiator ranges are infinitely extendable. You can slip additional panels between your existing sheds to make an extra-large shed tailored to your needs. Extensions come in 1.1 m (3 ft 7) increments – choose from 500 mm half-height ventilated panels or full-height ventilated or solid panels. All are made of the same galvanised steel as the main shed and carry Asgard’s industry-leading 10-year anti-perforation warranty. In short, you can build a walk-in workshop, a workshop, or an entire garage – all still Made in Britain and built to resist theft, weather, and wear.

How the Modular Extension System Works

• Front/Middle/Rear Base: Every Asgard XL shed is built on an integrated steel base. The front and rear bases anchor your shed, while the middle base is where extensions slot in.
• Extension Panels: We offer 500mm ventilated half-panels and 1100mm full panels (both ventilated and solid) to add length. Ventilated panels help exhaust fumes and cut condensation – great if you’re storing bikes or tools. You can mix and match panel sizes and vented/non-vented designs to suit your gear.
• Unlimited Expansion: Standard “Plus” packs (Centurion Plus 1, Gladiator Plus 1, etc.) add one or two modules. But if that’s not enough, we can make any size you need. Just call our team for a quote – there’s truly no limit on how long your shed can grow.

Half ventilated side panel	Full non-ventilated side panel	Full ventilated side panel

Ordering Your Extension Pack

It’s easy to order. On our site, you’ll find preconfigured Plus Packs (e.g., “Gladiator Plus 2” with two extensions) which bundle panels at a discount. If you need more than “Plus 2” or “Plus 3,” just call us – our sales team will quote a custom price for any number of extra modules. All extension kits include everything you need to bolt the new panels to your existing shed and base.

Note: Each 1.1m extension adds length to your base, so make sure your base (concrete or wooden) is long enough before ordering. See our base-size guide for details.

Extending an Already-Built Shed

Adding an extension to a shed you’ve already assembled requires a bit of care. You will need to dismantle the shed (unbolt panels) to insert the new sections. Because the panels are sealed with silicone, this can be tricky. Take great care when separating the shed sections so you don’t bend any panels. (If you do damage a panel, we can supply an identical spare.) Once apart, position the extension panels and bolt everything back together, re-sealing joints with silicone. Important: Our installation teams cannot take down an existing shed on-site to extend it – any extension to an installed shed is a DIY job.

Quick Tips: Lay down the shed flat if possible, or unscrew the roof, then separate panels. Scrape away old silicone carefully, or cut it with a sharp blade. Keep track of all bolts and sealant. With patience, you’ll have your larger shed assembled in no time – still fully covered by Asgard’s 10-year warranty.

Getting Started

Ready to go bigger? Browse our site for Centurion, Gladiator, Flexistore or Garrison models (standard and XL sizes), then call our friendly UK team to discuss custom sizing. We’re happy to walk you through options for shed extension kits and installation tips. With Asgard’s modular sheds, the sky’s the limit – it’s Made in Britain to fit your space.