What Base Does a Garden Shed Need?
A plain-English guide to shed bases: concrete, paving slabs or a timber frame, why the base must be level before delivery, and how to prepare your site.
By KDH Timber Buildings, 2026-10-23
Do you build the base for me?
The base needs to be ready before delivery day. Our site requirements page explains each option, and we're happy to talk it through on the phone before you start.
Which shed base is best?
A reinforced concrete base is the most durable and gives a perfectly level surface. Paving slabs on a compacted hardcore and sharp sand bed are a good-value alternative. A timber frame base is the budget option for smaller buildings.
How level does the base need to be?
Perfectly level — within 5mm (about a fifth of an inch) across the whole base. Check it with a spirit level before we arrive.
How long should a concrete base cure?
Allow at least 7 days for concrete to cure before installation day.