Before installing a new garden shed, it is vital to ensure that the base on which the shed will stand is completely level. This is particularly important anywhere with unpredictable weather that can erode the terrain.
It can be tempting to site your new shed directly onto grass, soil or a less than perfectly level surface, but doing so can lead to a variety of problems.
A level base gives structural integrity to a shed
A base that is level will support your shed’s frame and floor evenly, which will prevent the shed from becoming unstable over time. This instability can manifest in doors and windows which stick, and walls that warp. Gaps could also appear which will compromise not only the look of the shed, but also its durability. Even the smallest inclines could put uneven stress on the structure, leading to joints loosening and floors sagging.
These issues particularly affect wooden garden structures such as pent roof sheds, apex sheds and workshops as wood can twist and move if not properly supported. Shed foundations that are perfectly level will help the shed to maintain its shape over the years.
Level foundations help with weatherproofing and drainage
Here in the UK, where we experience heavy rain and damp conditions, a level shed base can help with effective water drainage, and reduce the risk of moisture pooling around or under the shed. If the ground is uneven, water could collect on one side, which could ultimately lead to rot, rust, or mould growth inside your shed.
Although you can install a damp-proof membrane beneath the base to help guard against rising moisture, this will only be effective if the base is flat and properly aligned.
Level foundations help with shed installation
At Sutton Sheds, our wooden garden structures are designed to be assembled on a flat surface. If a base isn’t level, it can be difficult for our installers to align panels, floors, and roofing correctly, which can be frustrating and time-consuming. Having a solid, level base makes the process much easier and ensures that all components of the structure fit together as intended.
At Sutton Sheds, we do not install shed foundations but we are always happy to recommend trusted contractors we have worked with, who can help with this.
Level foundations extend the life of a shed
A level base can extend the life of your shed significantly as uneven foundations provide uneven support, which leads to premature wear on materials and fixings. Whatever your shed is being used for, it needs a solid, stable and level base if it is to stand the test of time.
What happens if a shed is not level?
When a shed has not been installed on a level base, doors and windows may stick and will not open or close correctly. Joints could fail, leading to walls cracking, which will weaken the overall structure. In extreme cases, your shed could ultimately collapse, necessitating a new one which will cost far more than the price of good foundations in the first place!
Types of suitable shed bases
There are several base options available, including:
Concrete bases – these are extremely durable and are ideal for larger sheds.
Paving slabs - a popular choice for smaller sheds, paving slabs can provide good drainage and stability.
Timber frame foundations – these are quick to build and suitable for level ground, though they require treatment against damp.
For more detailed information, read What foundations do I need for my shed? but, whichever base you choose, the key is ensuring it is both level and appropriate for your garden's terrain and the size of your shed.
Wooden sheds from Sutton Sheds
At Sutton Sheds, we have been manufacturing, delivering and installing wooden garden sheds and other garden structure across the whole of Lincolnshire, for over 40 years. We understand that a level base isn’t just about looks — it’s the basis of a shed that will go on to perform well, and last for years. Taking the time to prepare a solid, level foundation will save you money, effort, and frustration in the long run.
If you are considering a new garden shed and would like to discuss its foundations, email us or call on 01526 342777.
