How to lay a base for your shed

And other important considerations

Base Considerations

How to choose a base for your shed

Once you have chosen your steel shed and decided where it will go in your garden, you need to prepare a solid and level site if not already in place. It is crucial that you provide a level and dry foundation. If your shed base is not level, or subsides over time, the screw holes connecting the wall panels will not line up. The structural integrity of your metal garden shed will suffer. Slowly, but surely you will find leaks at the base frame, panels breaking, and doors sticking.

We also recommend that you lay a damp-proof membrane under your solid, level base. This will decrease the chances of your shed being affected by condensation in the Winter Months.

So choosing a base for your Steel Shed is very important. The two of the main types of base suitable for a metal garden shed are:

  • A Concrete Base
  • A Paving Slab Base

Whichever method you decide to choose, we advise you allow a 2-inch (5 cm) lip around the base of your garden shed. To calculate the size of base required for the particular shed you wish to build, add 4 inch to the overall base dimensions to ensure an adequate base size. All of our shed dimensions can be found in the images of each product. 



Concrete Base Method

Click the title above to see how to lay a concrete base. In the link you’ll also find a list of the tools you need. 

Patio Slab Base Method

If you’re setting a Slab Base, click the title above to download our guide and see how to best go about doing so. You can also see how one of our staff members got on with laying a slab base here.

For our heavy duty cladded sheds and garages we recommend that you fit them on a rebate slab.

Instructions for laying a rebated slab base for a Cladded Shed & Garages are linked below

Rebated Slab Guidelines for Cladded Sheds

  • 2m x 2m (Base should be 220cm x 214cm)
  • 2m x 3m (Base should be 220cm x 314cm)
  • 3m x 3m (Base should be 320cm x 314cm)
  • 3m x 4m (Base should be 320cm x 414cm)

Rebated Slab details for Sheds


Rebated Slab Guidelines for Cladded Garages

Rebated Slab details for Garages


Any questions? Call us at 018644247, message us on Facebook, or visit us in our Finglas Showroom!