Best Base Foundations for Outdoor Shower Sheds

An outdoor shower shed can be a great addition to your backyard setup. One of the most important things to consider when installing an outdoor shower shed is the base foundation. A structure is only ever as good as its foundation. Keep reading to learn about a few different foundation options for your outdoor shed.

Wood Decking

Wood or timber can be built into a deck structure to be used as a base for the outdoor shower shed. It is important to use strong, pressure-treated wood as it will need to support the weight of the shed and the person or people inside it. Also, keep in mind that there will need to be space around the foundation in order to do any work or maintenance on the structure. Decking usually has added height and will stand much taller than the ground. Stairs may need to be added if using a wood decking as a base.

Slabs of Pavement

Paving slabs are a popular choice because of their strength and durability. However, they can be more difficult to install. Concrete slabs are heavy and challenging to move. In addition, a lot of preparation must be done on the ground where the slabs will go. The ground must be leveled, which requires removal and addition of turf. Course sand must then be added. The ground must be compacted extremely well to avoid shifts when settling. It is also important to keep a good distance from trees when choosing where to build as roots can crack and come through the foundation.

Plastic Grid

Using a plastic grid system is a fantastic substitute for paving slabs. The plastic grids are lightweight, durable, and moisture resistant. It is a great choice for a base foundation of an outdoor shower shed. The ground will need to be prepared the same as if laying slabs of pavement. However, the structure will need to have flooring on top of the plastic grid as it cannot act as both the base and the flooring the way a wood deck might.


Concrete is the strongest, yet most difficult to install. Concrete requires a lot of labor and can sometimes be quite expensive. The ground must be leveled out and the area must be properly framed. Its strength and durability are major positive qualities of choosing concrete. However, there are a few drawbacks to this type of structure as well. If done incorrectly, it is very difficult to resolve any issues with the concrete foundation. It is also a very permanent structure, therefore may require clearance if you have a Home Owner’s Association.

Existing Foundations

If you have an existing foundation in your yard that you’d like to use this may be a viable option. Assess the area and determine the structural integrity of the foundation, make sure it is not sloping in any way, and ensure that it doesn’t block any existing drainage. Additional drainage may need to be added, so it is important to take that into consideration.

There are several options for types of base foundation for an outdoor shower shed. Think about the space you have available, your available funds, needs, and the amount of labor you’re willing to do. Each option has its positives and negatives. Choosing the best base foundation for your outdoor shower shed or hot tub will put you one step closer to achieving a durable and lasting structure!